Compress PDF
Compress PDF files free online: reduce PDF size by recompressing images and streams right in your browser. No upload, no sign-up, no watermark.
Processed locally in your browserHow?
This tool runs in this browser tab. The files, text and values you enter are not uploaded to clkr.work servers — closing the tab clears them. Anonymous usage events (such as which button was pressed) are counted, never your content. Privacy policy
What next?
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How to use Compress PDF
- 1Drop a PDF onto the page or click to choose one
- 2Pick a compression level: Light, Recommended or Strong
- 3Click Compress PDF, check the new size and download the smaller file
Frequently asked questions
Is my PDF uploaded to a server?▾
No. The PDF is read and compressed entirely in your browser, so the file never leaves your device.
How much smaller will my PDF get?▾
It depends on the content. Scanned documents and PDFs full of photos often shrink by 50–90%, while text-only PDFs are usually already compact and shrink much less.
Does compression lower the quality?▾
Text and vector graphics stay sharp. Only embedded photos are re-encoded; Light keeps them close to the original, Strong trades more image detail for the smallest file.
Can I compress a password-protected PDF?▾
Encrypted PDFs cannot be opened without the password, so remove the protection first and then compress the file.
Embed Compress PDF on your website▾
Paste this snippet into your page. The embedded tool runs in your visitor's browser and shows a small “Powered by clkr.work” link.