Compress PDF
Shrink the file size of a PDF so it is easier to email, upload, and share. Fast, private, and free.
Click or drag and drop a PDF file
One PDF at a time. Your file never leaves your browser.
Why Flip Caps
Smaller PDFs in seconds
Real Size Reduction
Each page is re-rendered as an optimised image, which dramatically shrinks scanned documents, photo-heavy reports, and exports.
100% Private
Your PDF never leaves your browser. All compression happens locally with JavaScript, so nothing is uploaded to any server.
Choose Your Level
Pick lighter compression for the sharpest pages, or extreme compression when you need the smallest possible file to email or upload.
See the Savings
The result shows the before and after size and the exact percentage saved, so you know what you gained.
Instant and Free
No account, no sign-up, no watermark. Compress a document in seconds and download it right away.
Works on Mobile
Compress a PDF straight from your phone or tablet, with no desktop software to install.
How It Works
Three steps to a smaller PDF
Upload Your PDF
Click the upload area or drag a PDF onto the page. The file is loaded into your browser only, never sent anywhere.
Pick a Level
Choose lighter compression for the best quality, or extreme for the smallest file. Recommended suits most documents.
Download
Click Compress PDF, check the size saved, and download your smaller file.
Frequently Asked Questions
How does the compression work?
Each page is re-rendered as an optimised image and rebuilt into a new PDF. This is very effective on scanned and image-heavy documents, which are usually the largest files.
Are my files uploaded to a server?
No. Everything happens in your browser using JavaScript. Your PDF is never sent anywhere, so the process is completely private.
Will the text still be selectable?
No. Because pages are turned into images, the text in the compressed file is no longer selectable or searchable. If you need selectable text, keep your original.
Which level should I choose?
Recommended is the best balance for most files. Choose the lighter level when you want the sharpest pages, or extreme when you need the smallest possible file.
Why did my PDF barely get smaller?
PDFs that are mostly plain text are already compact, so there is little to save. The biggest reductions come from scans, photos, and graphics. Try the extreme level for more.
Does it work on Mac, Windows, and phones?
Yes. The tool is browser based and works on any operating system and modern browser, including iOS and Android.
About Compress PDF
The Flip Caps Compress PDF tool reduces the file size of a PDF directly in your browser, which makes it far easier to email, upload to a form, or store. It is especially effective on scanned documents and files packed with images.
Because everything runs client side, your document is never uploaded. Choose the level that fits your needs, from light compression that keeps pages crisp to extreme compression for the smallest possible file.
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