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MP4 to WebM Converter
Convert MP4 videos to WebM (VP9 video, Opus audio) - smaller files that play natively in every modern browser.
Drop your MP4 video here
Multiple files supported
VP9 VideoOpus Audio 128kyuv420pCRF 32 (high quality)
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Why Use Our MP4 to WebM Converter?
VP9 Video, Opus Audio
Encodes with the same codecs YouTube and most modern browsers use natively for WebM, for smaller files at comparable quality.
Batch Convert Multiple Files
Drop in as many MP4s as you need and convert them one after another, downloading each finished WebM individually.
100% Private
Your videos are never uploaded anywhere. Conversion runs locally in your browser using a WebAssembly build of FFmpeg.
No Sign-up Required
Open the page and start converting immediately. No account, no install, no fees.
Frequently Asked Questions
Is my video uploaded to a server?
No. Conversion runs entirely in your browser. Your video is never uploaded anywhere.
Why convert to WebM?
WebM with VP9/Opus typically produces smaller files than MP4 at similar quality, and plays natively in every modern browser without a plugin.
Will this re-encode my video?
Yes. MP4 and WebM use different video codecs, so there's no fast shortcut - every file is re-encoded with VP9 and Opus.
Is this tool free?
Yes. It's free to use with no sign-up.
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Text Tools (24)
View allText Case ConverterConvert any text between 7 case styles instantly: UPPER CASE, lower case, Title Case, Sentence case, Capitalized Case, alternating case, and Inverse case.Letter & Character RemovalRemove any specific letter, character, or symbol from text in one click. Strip numbers, punctuation, spaces, or any custom character you define.Duplicate Line RemoverRemove every duplicate line from a list instantly. Keep only unique lines with optional case-insensitive matching and automatic sorting.Duplicate Word FinderFind and highlight every word that appears more than once in your text. Quickly spot and clean up repetitive writing.Em Dash RemoverRemove or replace em dashes instantly. Swap them for a comma, hyphen, space, or delete them entirely. Great for cleaning up AI-generated text.Dash RemoverRemove or replace any type of dash: em dash, en dash, or hyphen. Choose your replacement character or strip them completely in one click.Find and Replace TextFind any word or phrase and replace every occurrence across your entire text in one click. Supports plain text and case-insensitive matching.Sentence CounterCount sentences, words, characters, paragraphs, and lines in any text. Get an estimated reading time based on average adult reading speed.Remove Line BreaksStrip unwanted line breaks to produce a clean, flowing paragraph. Perfect for fixing copied PDF or email content with hard returns.Remove Text FormattingStrip bold, italic, and all rich text formatting from pasted content. Convert any formatted text to clean plain text instantly.Remove UnderscoresReplace underscores in text with a space, hyphen, or remove them entirely. Convert snake_case identifiers to human-readable words.Reverse Text GeneratorReverse any text backwards: flip character order, reverse word order, or reverse entire line order. Results appear instantly in your browser.Alphabetical OrderSort words or lines into A-Z or Z-A alphabetical order instantly. Supports duplicate removal and case-insensitive sorting.Email ExtractorExtract and scrape all email addresses from any text, HTML, or document. Supports deduplication, sorting, and multiple separators.URL ExtractorExtract and scrape all URLs and links from any text or HTML source. Deduplicates, sorts, and normalizes www. links.Upside Down TextFlip text upside down and backwards using Unicode characters. Copy and paste anywhere — works on all platforms.Add Commas to NumbersAutomatically add thousands separators to every number in your text. Supports US/UK comma format and European period format.Remove EmojisStrip all emoji symbols and Unicode characters from any text instantly. Choose to remove only emojis or all non-ASCII characters.Bold Text GeneratorConvert normal text to bold using Unicode Mathematical Bold characters. Paste bold text anywhere — social media, bios, messages.Italic Text GeneratorConvert normal text to italic using Unicode Mathematical Italic characters. Works in Instagram, Twitter, Discord, and any plain-text field.Slug GeneratorConvert any title or phrase into a clean URL slug. Choose your separator, remove stop words, and set a max length. Perfect for blog posts, pages, and SEO-friendly URLs.Lorem Ipsum GeneratorGenerate placeholder lorem ipsum text by paragraphs, sentences, or words. Choose how much you need and copy it instantly. The classic tool for designers and developers.Text RepeaterRepeat any word, phrase, or block of text as many times as you need. Choose your separator and get the output instantly.Remove AI FormattingPaste ChatGPT or AI-generated text and strip all markdown formatting - bold headers, bullet points, dividers, and numbered lists - leaving clean, plain content.
PDF Tools (16)
View allMerge PDFCombine multiple PDF files into one document. Drag, drop, reorder, and merge — free and private.Split PDFSplit a PDF into individual pages or custom page ranges. Download as individual files or a ZIP archive.Compress PDFReduce the file size of a PDF so it is easy to email, upload, and share. Choose a compression level, done privately in your browser.Extract PDF PagesPick specific pages from any PDF and save them as a new document. Enter any combination of pages and ranges.JPG to PDFTurn JPG and JPEG photos into a single PDF. Add many at once, reorder them, and download one document.PNG to PDFTurn PNG images into a single PDF. Add many at once, reorder them, and download one document.PDF to JPGConvert every PDF page into a high-quality JPEG image. Download all pages at once as a ZIP archive.PDF to PNGConvert PDF pages to lossless PNG images. Perfect for presentations, web use, and image editing.Add WatermarkStamp any PDF with custom text. Control opacity, font size, color, position, and which pages to mark.Add Page NumbersNumber every page of your PDF with full control over position, starting number, prefix, and suffix.Header & FooterAdd custom headers and footers to every PDF page. Supports dynamic {page} and {total} variables.Table of ContentsCreate a professional table of contents page and prepend it to your PDF document.Remove Blank PagesAuto-detect and remove blank pages from scanned documents and digital PDFs.Password Protect PDFAdd a password to any PDF so it can only be opened by people who have it. Real encryption, done privately in your browser.PDF to DXFConvert PDF drawings into editable DXF CAD files. Real vector geometry for AutoCAD, CNC and laser cutting, plus tracing for scans.Unlock PDFRemove the password from a PDF you can already open, so it opens without a prompt. Private and instant in your browser.
Image Tools (20)
View allPNG to JPG ConverterConvert PNG images to JPG format instantly in your browser. No upload to any server.JPG to PNG ConverterConvert JPG images to PNG format with lossless output. 100% private, runs in your browser.WebP to JPG ConverterConvert WebP images to JPG format for maximum compatibility. Client-side, instant results.WebP to PNG ConverterConvert WebP images to PNG with full transparency support. No server, no sign-up.PNG to WebP ConverterConvert PNG images to WebP for smaller file sizes. Works entirely in your browser.JPG to WebP ConverterConvert JPG images to WebP format for better web performance. Fast and private.Image ResizerResize any image to exact pixel dimensions. Supports PNG, JPG, and WebP. Client-side only.Image CompressorCompress images by adjusting quality to reduce file size. Works in your browser, no uploads.Crop ImageCrop any image to the exact area you need. Draw a selection and apply in one click. No upload required.Rotate ImageRotate or flip any image instantly. Supports 90, 180, 270 degree rotation and horizontal or vertical flip.Watermark ImageAdd a custom text watermark to any image. Control position, size, opacity, and color. Runs in your browser.Meme GeneratorAdd top and bottom text to any image in classic meme style. Customize font size, text color, and outline color.Photo EditorAdjust brightness, contrast, saturation, blur, and grayscale on any photo. Free, private, and instant.Favicon GeneratorUpload your logo and get favicon.ico plus all standard PNG sizes (16 to 512px) ready to drop into your website.Add Logo to ImageStamp your logo onto any photo in seconds. Pick any of 9 positions, control size and opacity, and optionally add your website URL. Runs entirely in your browser.Remove EXIF DataStrip GPS location, camera model, timestamps, and other hidden EXIF, IPTC, and XMP metadata from your photos before sharing them. Batch process multiple photos at once, entirely in your browser.HEIC to JPG ConverterConvert iPhone HEIC and HEIF photos to universal JPG images. Convert many at once and download them all as a ZIP, entirely in your browser.Circle CropCrop any image into a centered circle and export a transparent PNG, ideal for profile pictures and avatars. Batch process many at once in your browser.Blur and Pixelate ImageHide faces, names, license plates, and sensitive details by blurring or pixelating any part of an image. Apply it across a whole batch in your browser.JPG to DXF ConverterTurn JPG, PNG and WebP images into editable DXF vector drawings for AutoCAD, laser cutters and CNC machines. Trace a whole batch at once, right in your browser.
Unit Converters (111)
View allLength ConverterConvert between all common length and distance units. Meters, feet, inches, miles, kilometers, and more.Weight and Mass ConverterConvert between kilograms, pounds, ounces, grams, tons, and all other weight and mass units.Volume ConverterConvert between liters, gallons, cups, fluid ounces, cubic meters, and all volume units.Temperature ConverterConvert between Celsius, Fahrenheit, Kelvin, and Rankine temperature scales.Area ConverterConvert between square meters, acres, hectares, square feet, square miles, and all area units.Pressure ConverterConvert between Pascal, bar, PSI, atmosphere, torr, mmHg, and all pressure units.Energy ConverterConvert between joules, calories, BTU, kilowatt-hours, electronvolts, and all energy units.Volume - Dry ConverterConvert between US dry volume units including bushels, pecks, dry gallons, dry quarts, and dry pints.Power ConverterConvert between watts, kilowatts, horsepower, BTU/hour, and all power units.Force ConverterConvert between newtons, pound-force, kilogram-force, dyne, and all force units.Time ConverterConvert between seconds, minutes, hours, days, weeks, months, years, and all time units.Speed ConverterConvert between meters per second, km/h, mph, knots, Mach, and all speed units.Angle ConverterConvert between degrees, radians, gradians, arcminutes, arcseconds, and all angle units.Fuel Consumption ConverterConvert between liters per 100km, miles per gallon (US/UK), km per liter, and all fuel economy units.Data Storage ConverterConvert between bits, bytes, kilobytes, megabytes, gigabytes, terabytes (decimal and binary).Velocity - Angular ConverterConvert between radians per second, RPM, degrees per second, and all angular velocity units.Acceleration ConverterConvert between m/s², ft/s², g-force, Gal, and all linear acceleration units.Acceleration - Angular ConverterConvert between radians per second squared, RPM per second, degrees per second squared.Density ConverterConvert between kg/m³, g/cm³, lb/ft³, lb/in³, g/L, and all density units.Specific Volume ConverterConvert between cubic meters per kilogram, cubic feet per pound, and all specific volume units.Moment of Inertia ConverterConvert between kg·m², g·cm², lb·ft², lb·in², and all moment of inertia units.Moment of Force ConverterConvert between newton-meters, pound-feet, kilogram-force meters, and all moment of force units.Torque ConverterConvert between newton-meters, pound-feet, kilogram-force meters, and all torque units.Fuel Efficiency - Mass ConverterConvert between J/kg, kJ/kg, BTU/lb, cal/g, and all specific energy (fuel efficiency by mass) units.Fuel Efficiency - Volume ConverterConvert between J/L, BTU/gallon, kcal/L, and all specific energy by volume units.Temperature Interval ConverterConvert temperature differences (intervals) between Celsius, Fahrenheit, Kelvin, and Rankine.Thermal Expansion ConverterConvert coefficients of thermal expansion between 1/K, 1/°C, 1/°F, and 1/°R.Thermal Resistance ConverterConvert between K/W, °C/W, h·°F/BTU, and all thermal resistance units.Thermal Conductivity ConverterConvert between W/(m·K), BTU/(h·ft·°F), cal/(cm·s·°C), and all thermal conductivity units.Specific Heat Capacity ConverterConvert between J/(kg·K), cal/(g·°C), BTU/(lb·°F), and all specific heat capacity units.Heat Density ConverterConvert between J/m³, BTU/ft³, cal/cm³, and all volumetric heat density units.Heat Flux Density ConverterConvert between W/m², BTU/(h·ft²), cal/(s·cm²), and all heat flux density units.Heat Transfer Coefficient ConverterConvert between W/(m²·K), BTU/(h·ft²·°F), kcal/(h·m²·°C), and all heat transfer coefficient units.Flow ConverterConvert volumetric flow rates between m³/s, L/min, gal/min, ft³/s, and all flow units.Flow - Mass ConverterConvert mass flow rates between kg/s, lb/s, kg/h, t/h, and all mass flow units.Flow - Molar ConverterConvert molar flow rates between mol/s, mol/min, kmol/h, and all molar flow units.Mass Flux Density ConverterConvert mass flux density between kg/(m²·s), g/(cm²·s), lb/(ft²·s), and all mass flux density units.Concentration - Molar ConverterConvert molar concentration between mol/L (M), mmol/L (mM), mol/m³, and all molarity units.Concentration - Solution ConverterConvert solution concentration between g/L, mg/L, g/dL, lb/gal, and all mass concentration units.Viscosity - Dynamic ConverterConvert dynamic viscosity between Pa·s, mPa·s (cP), poise, lb/(ft·s), and all dynamic viscosity units.Viscosity - Kinematic ConverterConvert kinematic viscosity between m²/s, mm²/s (cSt), Stokes, ft²/s, and all kinematic viscosity units.Surface Tension ConverterConvert surface tension between N/m, mN/m, dyne/cm, lbf/in, and all surface tension units.Permeability ConverterConvert permeability between darcy, millidarcy, m², cm², and all permeability units.Luminance ConverterConvert luminance between cd/m² (nit), cd/ft², foot-lambert, lambert, stilb, and all luminance units.Luminous Intensity ConverterConvert between candela, millicandela, kilacandela, and all luminous intensity units.Illumination ConverterConvert illuminance between lux, foot-candle, lumen/m², phot, nox, and all illuminance units.Digital Image Resolution ConverterConvert image resolution between DPI, DPC, DPCM, pixels per meter, and all resolution units.Frequency Wavelength ConverterConvert between Hz, kHz, MHz, GHz, THz, RPM, rad/s, and all frequency units.Charge ConverterConvert electric charge between coulombs, millicoulombs, ampere-hours, faradays, and all charge units.Linear Charge Density ConverterConvert linear charge density between C/m, µC/m, C/cm, and all linear charge density units.Surface Charge Density ConverterConvert surface charge density between C/m², µC/m², C/cm², and all surface charge density units.Volume Charge Density ConverterConvert volume charge density between C/m³, µC/m³, C/L, C/cm³, and all volume charge density units.Current ConverterConvert electric current between amperes, milliamperes, kiloamperes, abamperes, and all current units.Linear Current Density ConverterConvert linear current density between A/m, mA/m, A/cm, A/in, and all linear current density units.Surface Current Density ConverterConvert surface current density between A/m², mA/m², A/cm², and all surface current density units.Electric Field Strength ConverterConvert electric field strength between V/m, kV/m, V/cm, V/in, and all electric field units.Electric Potential ConverterConvert electric potential (voltage) between volts, millivolts, kilovolts, and all voltage units.Electric Resistance ConverterConvert electrical resistance between ohms, kilohms, megaohms, milliohms, and all resistance units.Electric Resistivity ConverterConvert electrical resistivity between Ω·m, Ω·cm, µΩ·m, and all resistivity units.Electric Conductance ConverterConvert electrical conductance between siemens, millisiemens, microsiemens, mho, and all conductance units.Electric Conductivity ConverterConvert electrical conductivity between S/m, mS/m, S/cm, µS/cm, and all conductivity units.Electrostatic Capacitance ConverterConvert capacitance between farads, microfarads, nanofarads, picofarads, and all capacitance units.Inductance ConverterConvert inductance between henries, millihenries, microhenries, nanohenries, and all inductance units.Magnetomotive Force ConverterConvert magnetomotive force between ampere-turns, kiloampere-turns, milliampere-turns, gilberts.Magnetic Field Strength ConverterConvert magnetic field strength between A/m, Oersted, kA/m, and all magnetic field strength units.Magnetic Flux ConverterConvert magnetic flux between webers, milliwebers, maxwells, and all magnetic flux units.Magnetic Flux Density ConverterConvert magnetic flux density between tesla, gauss, millitesla, and all magnetic flux density units.Radiation ConverterConvert radiation dose equivalent between sieverts, millisieverts, rem, millirem, and all dose equivalent units.Radiation-Activity ConverterConvert radioactivity between becquerels, curies, millicuries, rutherford, and all activity units.Radiation-Exposure ConverterConvert radiation exposure between coulombs per kilogram, roentgens, and all exposure units.Radiation-Absorbed Dose ConverterConvert absorbed radiation dose between grays, rads, milligrays, and all absorbed dose units.Prefixes ConverterConvert between SI metric prefixes: yotta, zetta, exa, peta, tera, giga, mega, kilo, milli, micro, nano, pico.Data Transfer ConverterConvert data transfer rates between Mbps, Gbps, MB/s, GB/s, and all bandwidth units.Sound ConverterConvert sound level units between decibels, bels, nepers, and power/amplitude ratios.Typography ConverterConvert typographic units between points, picas, pixels, millimeters, inches, and all typography units.Volume - Lumber ConverterConvert lumber volume between board feet, cubic feet, cubic meters, cords, and all lumber volume units.Fitness ConverterConvert weight (kg/lbs/stone), height (cm/ft), distance (km/miles), running pace, calories, and body measurements - all in one place.CM to InchesConvert centimeters to inches instantly. Enter any value and get the exact result in decimal inches.MM to InchesConvert millimeters to inches quickly and accurately. Ideal for engineering, woodworking, and crafts.Meters to FeetConvert meters to feet instantly. Useful for height, room dimensions, and construction measurements.KM to MilesConvert kilometers to miles instantly. Great for travel distances, running routes, and road trips.CM to FeetConvert centimeters to feet in one click. Perfect for converting height measurements.Inches to FeetConvert inches to feet quickly. Useful for construction, interior design, and measurements.Meters to YardsConvert meters to yards instantly. Commonly used in sports fields, fabric, and landscaping.Inches to CMConvert inches to centimeters instantly. Essential for international sizing and measurements.Inches to MMConvert inches to millimeters precisely. Ideal for engineering drawings and technical specs.Feet to MetersConvert feet to meters instantly. Useful for construction, aviation, and scientific measurements.Miles to KMConvert miles to kilometers instantly. Great for travel planning and fitness tracking.Feet to CMConvert feet to centimeters quickly. Commonly used for height conversions and measurements.Feet to InchesConvert feet to inches instantly. Essential for carpentry, construction, and everyday measurements.Yards to MetersConvert yards to meters instantly. Useful for fabric measurements, sports, and landscaping.KG to LBSConvert kilograms to pounds instantly. Perfect for fitness, cooking, and shipping calculations.Grams to OuncesConvert grams to ounces quickly. Ideal for cooking recipes and ingredient measurements.Pounds to OuncesConvert pounds to ounces instantly. Useful for cooking, shipping, and package weights.LBS to KGConvert pounds to kilograms instantly. Essential for international weight measurements and fitness.Ounces to GramsConvert ounces to grams precisely. Great for cooking, nutrition tracking, and food labels.Ounces to PoundsConvert ounces to pounds instantly. Useful for weight tracking, shipping, and package sizes.Celsius to FahrenheitConvert Celsius to Fahrenheit instantly. Essential for weather, cooking, and science.Fahrenheit to CelsiusConvert Fahrenheit to Celsius instantly. Perfect for understanding international weather and recipes.Liters to GallonsConvert liters to US gallons quickly. Great for fuel economy, cooking, and tank sizes.mL to CupsConvert milliliters to cups instantly. Essential for cooking recipes and kitchen measurements.Gallons to LitersConvert US gallons to liters instantly. Useful for fuel, water tanks, and cooking.Cups to mLConvert cups to milliliters instantly. Essential for baking and international recipes.MPH to KPHConvert miles per hour to kilometers per hour instantly. Perfect for travel and speed limits.KPH to MPHConvert kilometers per hour to miles per hour instantly. Useful for international driving and travel.Acres to Square FeetConvert acres to square feet instantly. Ideal for real estate, land surveying, and property measurements.Square Feet to AcresConvert square feet to acres instantly. Perfect for real estate listings and land area calculations.Radians to DegreesConvert radians to degrees instantly. Essential for mathematics, physics, and engineering.Degrees to RadiansConvert degrees to radians instantly. Essential for trigonometry, programming, and math calculations.HP to KWConvert horsepower to kilowatts instantly. Useful for comparing engine power and electric motors.KW to HPConvert kilowatts to horsepower instantly. Essential for comparing electric vehicle and engine ratings.
Calculators (34)
View allAge CalculatorCalculate your exact age in years, months, and days. See total days lived, hours, your zodiac sign, and days until your next birthday.Percentage CalculatorCalculate percentages instantly. Find what percent X is of Y, calculate percent change, and work out percentage increases or decreases.Discount CalculatorCalculate the final price after a discount. Enter the original price and discount percentage to see your savings instantly.Tip CalculatorCalculate the tip on any bill. Split between multiple people and choose your tip percentage. Instant results, no sign-up needed.CalculatorA simple, fast online calculator for everyday math. Add, subtract, multiply, divide, with percent, sign change, and full keyboard support.Scientific CalculatorFull scientific calculator with trigonometry, logarithms, powers, roots, and memory functions. Works entirely in your browser.Compound Interest CalculatorCalculate how your investment grows with compound interest. See the final balance, total interest earned, and year-by-year breakdown.Loan CalculatorCalculate your monthly loan payment, total interest, and total repayment amount for any loan amount, rate, and term.Mortgage CalculatorCalculate your monthly mortgage payment including principal and interest. Enter home price, down payment, rate, and loan term.Savings Goal CalculatorFind out how much you need to save each month to reach your financial goal. Includes interest rate and existing savings.BMI CalculatorCalculate your Body Mass Index (BMI) using height and weight in metric or imperial units. See your BMI category and healthy range.Calorie CalculatorCalculate your daily calorie needs (TDEE) based on age, gender, height, weight, and activity level. Includes weight loss and gain targets.Pregnancy Due Date CalculatorCalculate your estimated pregnancy due date from your last menstrual period. See key milestones and trimester dates.Ideal Weight CalculatorCalculate your ideal body weight based on height and gender using four established medical formulas including Devine and Robinson.GPA CalculatorCalculate your GPA by adding courses with grades and credit hours. Supports both letter grades and 4.0 scale inputs.Grade CalculatorFind out what grade you need on your final exam to reach your target grade. Enter your current grade and the weight of the final.Hours Worked CalculatorCalculate total hours worked from start and end times. Add break time, multiple shifts, and an optional hourly rate for pay.Date Difference CalculatorCalculate the exact number of days, weeks, months, and years between any two dates.Days Until CalculatorFind how many days until any event - Christmas, New Year, a birthday, or any custom date.Roman Numeral ConverterConvert numbers to Roman numerals and Roman numerals back to numbers. Supports 1 to 3,999.Fraction CalculatorAdd, subtract, multiply, and divide fractions. Results are automatically simplified to lowest terms.Ratio CalculatorSimplify ratios, scale them up or down, and find a missing value in a proportion.Average CalculatorCalculate mean, median, mode, range, sum, and count for any set of numbers.Retirement CalculatorCalculate how much you need to save for retirement and whether your current savings are on track.Debt Payoff CalculatorSee how long it takes to pay off a debt and how much interest you pay at different monthly amounts.Body Fat CalculatorEstimate your body fat percentage using the US Navy method. Supports metric and imperial units.Ovulation CalculatorCalculate your estimated ovulation date and fertile window based on your cycle length and last period.Blood Alcohol CalculatorEstimate your blood alcohol content (BAC) based on drinks, weight, gender, and time elapsed.Fuel Cost CalculatorCalculate the fuel cost for any trip based on distance, fuel efficiency, and gas price.Unit Price CalculatorCompare two or more products by price per unit to find the best value. Great for grocery shopping.Budget Planner (50/30/20)Enter your income and see it split by the 50/30/20 rule into needs, wants, and savings. Adjust percentages, track actual spending, and see where you stand.Monthly Expense CalculatorAdd up what you spend daily and monthly, enter your income, and instantly see your total monthly spending, savings, and savings rate.Paycheck CalculatorEstimate your take-home pay after federal tax, FICA, and deductions. See per-paycheck and annual breakdowns.Tax Refund EstimatorEstimate your federal tax refund or amount owed based on income, withholding, and filing status.
Media Tools (29)
View allGIF EditorCombine, trim, speed up, slow down, and add fade transitions to animated GIFs on a timeline, then export as a single GIF. Runs entirely in your browser.MOV to MP4 ConverterConvert MOV, MKV, AVI, and WebM videos to MP4. Uses a fast lossless remux when possible and falls back to H.264/AAC re-encoding otherwise. Runs entirely in your browser.Audio ToolsA hub for the audio tools: extract audio from a video, replace a video's audio track, or trim audio to a range. Each opens its own tool.Video to MP3Extract the audio from any video and save it as an MP3. Works with MP4, MOV, MKV, and WebM, entirely in your browser.Replace Audio in VideoSwap a video's audio track for a voiceover, song, or any other audio. The video stream is kept exactly as-is, in your browser.Trim AudioCut an audio file down to the exact section you need using a waveform, and download it as MP3 or WAV, entirely in your browser.WebM to MP4 ConverterConvert WebM videos to MP4 with H.264 and AAC for the widest playback compatibility. Runs entirely in your browser.MKV to MP4 ConverterConvert MKV videos to MP4. Uses a fast lossless remux when possible and falls back to re-encoding otherwise. Runs entirely in your browser.AVI to MP4 ConverterConvert AVI videos to MP4 for modern playback compatibility. Runs entirely in your browser.MOV to GIF ConverterTurn a MOV video clip into an animated GIF with adjustable frame rate and size. Runs entirely in your browser.MP4 to GIF ConverterTurn an MP4 video clip into an animated GIF with adjustable frame rate and size. Runs entirely in your browser.Video TrimmerCut a video down to the exact clip you need with a simple start and end range. Runs entirely in your browser.Mute VideoRemove the audio track from a video in one click. Runs entirely in your browser.Rotate VideoRotate a sideways or upside-down video 90, 180, or 270 degrees, or flip it horizontally or vertically. Runs entirely in your browser.Video CompressorShrink a video's file size with an adjustable quality slider, with before and after sizes shown. Runs entirely in your browser.Video ResizerResize a video to 1080p, 720p, 480p, Instagram Square, Instagram Story, or any custom dimensions. Runs entirely in your browser.Extract Video FrameGrab a single still frame from any moment in a video and save it as a JPG or PNG. Runs entirely in your browser.Crop VideoCrop a video by dragging a selection over a preview frame, then apply it to the whole clip. Runs entirely in your browser.Watermark VideoAdd a text watermark to a video in any of 9 positions, with adjustable size, color, and opacity. Runs entirely in your browser.Merge VideosCombine multiple video clips into one file, in any order you choose. Runs entirely in your browser.Split VideoSplit a video into equal parts or at custom timestamps, and download all the parts as a ZIP. Runs entirely in your browser.Video Speed ChangerSpeed up or slow down a video from 0.25x to 4x, with audio pitch handled automatically. Runs entirely in your browser.Reverse VideoPlay a video backwards. Best for short clips, since reversing needs to hold the whole video in memory. Runs entirely in your browser.Audio ConverterConvert audio between MP3, WAV, OGG, M4A, and FLAC. Runs entirely in your browser.OGG to MP3Convert OGG audio files to MP3 for playback on any device or player. Batch convert many files at once, entirely in your browser.Audio CompressorShrink an audio file's size with a selectable bitrate, with before and after sizes shown. Runs entirely in your browser.Merge AudioCombine multiple audio files into one track, in any order you choose. Runs entirely in your browser.Audio Speed ChangerSpeed up or slow down an audio track from 0.5x to 3x. Runs entirely in your browser.Audio Volume BoosterBoost or reduce an audio track's volume, or normalize it to a standard loudness level in one click. Runs entirely in your browser.
Games and Puzzles (17)
View allMemory MatchClassic card-matching memory game with three difficulty levels. Tracks your moves and time, and saves your best score so you can try to beat it.Tic-Tac-ToePlay Tic-Tac-Toe against a friend or the computer. Choose an easy opponent or an unbeatable one, and track your win, loss, and draw record.HangmanClassic word-guessing game with Animals, Countries, Food, and Everyday Objects categories. Guess letters before you run out of tries.2048Slide and merge tiles to reach 2048. Play with arrow keys or swipe on mobile, and try to beat your best score.Word Search GeneratorGenerate a word search puzzle from a theme or your own word list, then click the first and last letter of a word to find it.SudokuPlay Sudoku with three difficulty levels. Every puzzle is generated with a guaranteed unique solution, with notes mode and a mistake checker.Daily WordA new 5-letter word puzzle every day. Guess the word in 6 tries, build your streak, and share your result.MinesweeperClassic Minesweeper with three difficulty levels. Your first click is always safe, flag mode works great on mobile, and your best time is saved.Sliding PuzzleThe classic 8-puzzle and 15-puzzle sliding tile games. Every shuffle is guaranteed solvable, with a move counter and best score saved.Lights OutClick a light to toggle it and its neighbors. Turn every light off to win, with three difficulty levels and your best move count saved.Simon SaysWatch the color and sound pattern, then repeat it back. Each round adds one more step. How many rounds can you remember?Reaction Time TestClick as fast as you can the moment the screen turns green. Catches false starts, tracks your average, and saves your best reaction time.Dots and BoxesTake turns drawing lines between dots. Complete the fourth side of a box to claim it and get an extra turn. Most boxes wins against the computer.Connect FourDrop pieces to connect four in a row before the computer does. The AI thinks several moves ahead, so it plays a genuinely strong game.MastermindCrack the hidden 4-color code in 10 guesses or fewer using black and white peg feedback. Tracks your wins, losses, and fewest guesses to solve.SnakeClassic arcade Snake. Steer with arrow keys or swipe on mobile, eat food to grow, and avoid the walls and your own tail. Best score saved.Tower of HanoiMove the whole stack of disks to the last peg in the fewest moves possible. Choose from 3 to 7 disks and compare against the mathematical minimum.
Developer Tools (8)
Password GeneratorGenerate strong, random passwords with custom length and character sets. Includes strength indicator and copy button.Base64 Encoder/DecoderEncode text or files to Base64 and decode Base64 strings back to plain text. Supports URL-safe mode.Number to WordsConvert any number into English words. Supports up to trillions, ordinal mode, and currency format.Screen Resolution CheckerCheck your screen resolution, viewport size, device pixel ratio, color depth, browser, and OS instantly.Aspect Ratio CalculatorCalculate the aspect ratio of any dimensions, or find a missing width or height from a known ratio.Vanishing Note - Self-Destructing NotesSend a secret note that self-destructs after being read. Encrypted in your browser, shared as a single-use link.Script SplitterPaste a long script and split it into copy-ready chunks of any character limit. Copy each part one at a time with a single click.Print PadA multi-page document editor with text formatting, tables, images, margins, and find and replace. Print or save as PDF straight from your browser.
Fun and Random (19)
View allDice RollerRoll any number of dice in any combination - d4, d6, d8, d10, d12, and d20. Instant results.Coin FlipperFlip a virtual coin and get heads or tails instantly. Flip multiple coins at once.Random Quote GeneratorGet a random inspirational quote with one click. Hundreds of famous quotes from history's greatest minds.Random Number GeneratorGenerate random numbers within any range. Generate multiple numbers and optionally keep them unique.Yes or No GeneratorCan't decide? Get a random yes or no answer instantly. Includes a maybe option for tough decisions.Keyboard TesterTest every key on your keyboard online. Choose from Windows full, TKL, 75%, 65%, 60%, Mac, and MacBook layouts.Dead Pixel TesterCheck your monitor for dead or stuck pixels using solid color screens. Red, green, blue, black, white, and more.Camera Shutter Count CheckerUpload a JPEG photo to check your camera's shutter count and view full EXIF camera details. Supports Canon and Nikon shutter count detection.Magic 8-BallAsk the Magic 8-Ball any yes-or-no question and shake it for an answer. All 20 classic responses, just like the original toy.Typing Speed TestTest your typing speed and accuracy with 10 different passages. Live WPM tracking and character-level feedback.Pros and Cons ListBuild a structured pros and cons list for any decision. See the balance at a glance, then copy or print your list.Baby Name GeneratorGenerate baby name ideas by gender, origin, starting letter, and meaning. Find the perfect name for boys, girls, or unisex.Username GeneratorGenerate unique username and gamertag ideas from your name or keywords. Choose a style and get instant results.Fantasy Name GeneratorGenerate fantasy names for characters, races, and places. Perfect for D&D, fiction writing, and worldbuilding.Business Name GeneratorGenerate creative business and brand name ideas from your keywords. Pick a style and get instant suggestions.New Year's Resolution TrackerSet New Year's resolutions, break them into milestones, and track your progress throughout the year.Spin the WheelAdd names, spin the wheel, and let it decide. Great for random picks, giveaways, and classroom activities.Random Team GeneratorPaste a list of names and split them into random, balanced teams instantly. Set the number of teams, add custom team names, and re-shuffle as many times as you like.Chore WheelBuild a weekly chore schedule for your household. Add people and tasks, then randomize assignments fairly or set them manually.
Design and Color (4)
Color ConverterConvert colors between HEX, RGB, HSL, and HSB formats instantly with a live color preview.Random Color GeneratorGenerate random colors with their HEX, RGB, and HSL values. Copy any format instantly.QR Code GeneratorGenerate a QR code from any URL or text. Download as PNG instantly. Free, private, no sign-up.Color Palette GeneratorGenerate harmonious color palettes from any base color. Complementary, analogous, triadic, and more.
Time Tools (6)
Alarm ClockFree online alarm clock. Set an alarm time and get a browser alert and sound when it goes off.Online TimerFree countdown timer. Set hours, minutes, and seconds and get an alert when the time is up.StopwatchFree online stopwatch with lap times. Start, stop, and reset with a single click.Time Zone ConverterConvert time between any two cities or time zones instantly. Great for scheduling across countries.Sleep CalculatorCalculate the best time to go to sleep or wake up based on 90-minute sleep cycles.Holiday CountdownLive countdowns to major holidays - Christmas, New Year, Thanksgiving, Halloween, and more.