🗜️ Compress PDF
Shrink PDF file size while keeping text sharp and readable — entirely in your browser.
Upload a PDF to compress
Drag and drop a PDF, or click to browse
PDF only • up to 300MB • 100% processed in your browser
🔒 Privacy
Your files are automatically deleted after processing. Everything runs 100% in your browser — nothing is ever uploaded to a server.
✨ Features
❓ Frequently Asked Questions
Will compressing reduce my PDF quality?
Text, fonts, links and page layout are never touched — only embedded photos/scans are recompressed, and only if the result is actually smaller. Low compression keeps images near-original quality; High trades more image quality for maximum size reduction.
Is my file uploaded to a server?
No. Compression runs entirely in your browser using JavaScript — your PDF is never sent anywhere. That also means there's no upload wait, and nothing to clean up on our end afterward.
What's the maximum file size supported?
Files up to 300MB, limited by your browser's available memory rather than a server-side cap.
Why didn't my PDF get much smaller?
If your PDF is mostly text (a resume, invoice, or report with no photos), it's likely already close to its minimal size — compression mainly reduces size by recompressing embedded images, so text-only PDFs see smaller gains.
What happens to scanned documents?
A scanned PDF is usually one large photo per page, which is exactly what this tool targets — scanned documents typically see the largest size reductions.
How PDF compression works
Most oversized PDFs are large because of embedded photos or scanned pages, not text. This tool finds every embedded JPEG image in your document — including ones reused across multiple pages — and re-encodes each one at a lower quality and resolution based on the level you choose. Vector text, fonts, and links are part of the PDF's structure rather than an image, so they're left completely untouched, keeping your document sharp and readable after compression.
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