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Compress PDF

Shrink a PDF by recompressing its embedded images — text and layout stay untouched. No sign-up, no upload, no file size limit.

Drop a PDF here, or click to browse

Your files never leave your device. Everything runs locally in your browser — nothing is uploaded to a server, so there's no file size limit, no subscription, and no one but you ever sees what's in your file.

How it works

Upload a PDF and pick a compression level. The tool scans every page for embedded JPEG images, decodes each one, and re-saves it at your chosen quality — smaller quality settings produce a smaller file. Everything else in the PDF (text, fonts, vector graphics, page layout) is left exactly as it was.

A note on what this tool won't do

It won't shrink a PDF that's already mostly text, and it deliberately skips images with transparency or unusual encodings rather than risk a visually broken result. For PDFs that are essentially scanned photos of pages, expect the biggest savings; for text-heavy documents, expect little to no change.

Frequently asked questions

What actually gets smaller?+

This tool re-encodes the JPEG photos embedded inside your PDF at a lower quality setting, which is usually where most of a PDF's file size comes from. Text, vector graphics, and fonts are left completely untouched — only image data is recompressed.

Why didn't my file get smaller?+

If a PDF is mostly text (a report, an invoice, an exported document) there may be little or no image data to recompress, so the result will be about the same size. This tool also skips images that already have transparency, or aren't stored as standard JPEG data, to avoid any risk of visually corrupting them — those are left as-is rather than forced through a lossy re-encode.

Will this reduce the quality of my images?+

Yes, by design — that's how JPEG recompression saves space. "High quality" keeps changes barely noticeable; "Smallest file" trades more visible quality for a smaller result. Try Balanced first and compare.

Is there a file size limit?+

No — processing happens entirely on your device, not a server, so there's no subscription tier or upload cap. Very large or image-heavy PDFs may just take longer and use more of your device's memory.

Keep a backup of your original file. This tool processes everything locally in your browser, and we've tested it carefully — but no conversion tool handles every PDF perfectly. Always keep your original file and double-check important results before relying on them.