Flip Caps is a free online text case converter. You paste any text into the tool, click a button, and it instantly converts your text into the case style you choose, all inside your browser with no sign-up required.

What is a text case converter?

A text case converter is a tool that changes the capitalization style of any text. Instead of manually retyping content, you paste it in and choose a style like UPPER CASE, lower case, or Title Case, and the tool transforms it for you in a single click.

What case styles does Flip Caps support?

Flip Caps supports seven case styles: Sentence case (capitalizes the first letter of each sentence), lower case (all lowercase), UPPER CASE (all capitals), Capitalized Case (first letter of every word), aLtErNaTiNg cAsE (alternates each letter), Title Case (proper title capitalization), and InVeRsE CaSe (flips existing capitalization).

Is Flip Caps free to use?

Yes. Flip Caps is completely free. There is no subscription, no sign-up, no trial, and no paywall. You can convert as much text as you want at no cost.

Is my text private when I use Flip Caps?

Yes, 100%. Flip Caps runs entirely in your browser using JavaScript. Your text is never sent to any server, never stored, and never seen by anyone. Everything happens locally on your device.

Is there a character limit?

No. Flip Caps has no character limit. You can paste an entire essay, article, email, or document and it will convert the full text without any restrictions.

Can I download the converted text?

Yes. After converting your text, click the Download button in the toolbar to save the result as a plain .txt file directly to your device.

Can I use Flip Caps as a capital text generator?

Yes. Flip Caps is a great capital text generator. Click UPPER CASE to convert every letter to a capital, or click Capitalized Case to capitalize only the first letter of each word. Both options work instantly with no character limit.

What is the difference between UPPER CASE and Capitalized Case?

UPPER CASE converts every single letter to a capital (e.g. 'hello world' becomes 'HELLO WORLD'). Capitalized Case only capitalizes the first letter of each word (e.g. 'hello world' becomes 'Hello World'). Choose UPPER CASE for emphasis or headings; choose Capitalized Case for names and branded terms.

What is Sentence case and when should I use it?

Sentence case capitalizes only the first letter of each sentence and lowercases everything else, just like normal written English. Use it to fix text that was pasted in the wrong format, or to quickly normalize inconsistently capitalized content.

What is Title Case and when should I use it?

Title Case capitalizes major words in a title while keeping short connecting words (a, an, the, and, but, or, for, in, of, etc.) in lowercase. It follows standard English title-writing conventions. Use it for article headlines, blog post titles, book chapters, and page headings.

What is alternating case?

Alternating case (aLtErNaTiNg cAsE) switches every letter between lowercase and uppercase, the first letter is lowercase, the second uppercase, the third lowercase, and so on. It is mostly used for memes, social media humor, and informal creative text.

What is Inverse case?

Inverse case (also called toggle case or flip case) swaps the capitalization of every letter, uppercase letters become lowercase and lowercase letters become uppercase. For example, 'Hello World' becomes 'hELLO wORLD'. It is useful for quickly reversing the case of text that was typed with Caps Lock accidentally on.

How do I fix text that was accidentally typed in ALL CAPS?

Paste the all-caps text into Flip Caps and click Sentence case to convert it to normal capitalization, or click lower case to make everything lowercase first. This is much faster than retyping the entire text.

Does Flip Caps work on iPhone and Android?

Yes. Flip Caps is fully responsive and works on any device, iPhone, Android, tablet, desktop, or laptop. The interface adapts to smaller screens and all case conversion buttons are touch-friendly.

Does Flip Caps require an account or sign-up?

No. Flip Caps requires no account, no sign-up, no email address, and no password. You open the website and the tool is immediately ready to use.

What browsers does Flip Caps work in?

Flip Caps works in all modern browsers including Google Chrome, Safari, Firefox, Microsoft Edge, Opera, and Brave. It requires JavaScript to be enabled, which it is by default in all browsers.

How do I copy the converted text?

After converting your text, click the Copy button in the toolbar above the text area. A confirmation checkmark appears to confirm the text has been copied to your clipboard. You can then paste it anywhere.

What is the difference between Title Case and Sentence Case?

Title Case capitalizes the first letter of every major word (used for headings and titles). Sentence Case only capitalizes the first letter of the first word in each sentence (used for normal written text). For example, 'the quick brown fox' becomes 'The Quick Brown Fox' in Title Case but 'The quick brown fox' in Sentence Case.

What is a duplicate line remover?

A duplicate line remover is a free online tool that scans text and deletes any lines that appear more than once. The first occurrence of each line is kept and all repeated copies are removed, preserving the original order of the text.

How do I use the duplicate line remover?

Paste or type your text in the left input field. The tool instantly detects and removes all duplicate lines, showing the deduplicated result in the right output field. You can then copy or download the result.

Does it preserve the original order of lines?

Yes. The first occurrence of each line is always kept in its original position. Only the repeated copies that come after it are removed. The order of unique lines is never changed.

Is the duplicate detection case-sensitive?

You can choose. In case-sensitive mode (default), 'Apple' and 'apple' are treated as different lines and both are kept. In case-insensitive mode, they are treated as duplicates and only the first one is kept.

What counts as a duplicate line?

Any line that is identical to a line that appeared earlier in the text is considered a duplicate. Empty lines are also treated as lines, if you have multiple blank lines, only the first blank line is kept in case-sensitive mode.

Can I use this to deduplicate lists?

Yes. This is one of the most common uses. Paste a list of items (one per line), click the tool, and get back a clean list with all duplicates removed. Works great for email lists, keyword lists, product names, and more.

Is there a limit on how many lines I can process?

No. The tool handles text of any length, thousands of lines with no restriction. All processing happens in your browser so there is no server-side limit.

Is my text private when I use this tool?

Yes, 100%. All processing runs entirely in your browser. Your text is never uploaded to any server, never stored anywhere, and never seen by anyone else.

Yes. The duplicate line remover is completely free with no subscription, no sign-up, no trial, and no paywall. Use it as many times as you want at no cost.

Can I download the deduplicated text?

Yes. Click the Download button to save the result as a plain .txt file directly to your device.

Does it remove blank/empty lines?

In case-sensitive mode, only duplicate blank lines are removed, the first empty line is kept. If you want to remove all blank lines, that is a separate option available in the tool settings.

Can I use this on mobile?

Yes. The tool is fully responsive and works on iPhone, Android, tablet, and any desktop or laptop browser. All buttons and inputs are touch-friendly.

Do I need an account?

No. No account, no sign-up, no email, no password required. Open the page and start using it immediately.

What happens to whitespace around lines?

By default, lines are compared exactly as they appear including any leading or trailing spaces. Enable the 'trim whitespace' option if you want lines like ' Apple ' and 'Apple' to be treated as the same line.

Remove Duplicates·Clean Your Lists·Unique Lines Only·Order Preserved·Real-time Preview·Free & Private·No Sign-up·

Text Tool

Duplicate Line Remover

Paste any text and repeated lines are removed instantly, order preserved, first occurrence kept.

Input Text0 lines

Output0 lines

Case-sensitive

Trim whitespace

Remove empty lines

Features

Everything you need.

Smart deduplication with full control over how duplicates are detected.

Remove duplicate lines

Every repeated line is detected and deleted automatically. Only the first occurrence of each line is kept.

Preserves original order

The order of unique lines is never shuffled or sorted. Your text comes out in the exact order you pasted it.

Case-sensitive control

Choose whether 'Apple' and 'apple' count as duplicates. Toggle case-sensitive mode on or off with one click.

Trim whitespace option

Optionally treat lines with leading or trailing spaces as identical to the same line without them.

Remove empty lines

Toggle the option to strip all blank lines from your text along with duplicates in one pass.

Live duplicate counter

See exactly how many duplicate lines were removed and how many unique lines remain, updated in real time.

One-click copy

Copy the cleaned text to your clipboard instantly with a clear visual confirmation checkmark.

Download as .txt

Save the deduplicated result as a plain-text file directly to your device in one click.

100% private

All processing runs in your browser. Your text is never uploaded to any server or seen by anyone else.

How it works

Three steps, done.

Paste your text

Drop any text into the input, a list, email, document, or any multiline content.

Choose your options

Toggle case-sensitive, trim whitespace, or remove empty lines to control what counts as a duplicate.

Copy and done

Click Copy Output or Download. Your deduplicated text is ready in seconds.

FAQ

Common questions.

About

Why use this tool?

Whether you are cleaning up a keyword list, deduplicating a CSV export, removing repeated log entries, or tidying up any multiline text, this tool removes every duplicate in one click while keeping your original order intact.

No sign-up. No character limit. No servers reading your text. Just a fast, free duplicate line remover that works in any browser.

Text Case Converter →

Duplicate Line Remover

Everything you need.

Three steps, done.

Paste your text

Choose your options

Copy and done

Common questions.

Why use this tool?

Every tool, in one place.

Text Case Converter

Letter & Character Removal

Duplicate Word Finder

Em Dash Remover

Dash Remover

Find and Replace Text

Sentence Counter

Remove Line Breaks

Remove Text Formatting

Remove Underscores

Reverse Text Generator

Alphabetical Order

Merge PDF

Split PDF

Extract PDF Pages

PDF to JPG

PDF to PNG

Add Watermark

Add Page Numbers

Header & Footer

Table of Contents

Remove Blank Pages