Free browser tool
Compress PDF Online
Re-pack PDFs in your browser to shave off wasted bytes. Private, free, no upload.
Drop a PDF here
or click to choose — it's re-packed on your device
100% client-side — your PDFs never leave this device. Large PDFs use more memory — very big files may be slow or fail on phones.
About this PDF compressor
This tool loads your PDF with pdf-lib and saves it again using compact cross-reference object streams. Files produced by some scanners, exporters, or repeated edits often carry structural overhead that a re-pack removes.
We're upfront about the limits: images inside the PDF are not resampled, so this is lighter than Ghostscript or Acrobat's "Reduce file size". If the result isn't smaller, you'll see that clearly and can keep the original.
Need to shrink the images first? Use the image compressor before building your PDF, or split out only the pages you need.
Why compress here
No upload, ever
pdf-lib runs inside your browser tab. Contracts, invoices, and IDs never touch a server.
Free, no signup
No account, no watermark added by us, no daily limit.
Works on mobile
Responsive layout for phone, tablet, and desktop — no app install.
Part of a PDF toolkit
Jump to merge, split, compress, delete, insert, or stamp — each with its own page.
How to compress a PDF
- 1
Choose your PDF
Drop or select one PDF file.
- 2
Pick a mode
Re-pack keeps everything; Deep clean rebuilds from pages for a bit more savings.
- 3
Download
Compare sizes and download the smaller file.
FAQ
More from Okay OK
Okay OK is the official home of the OK product family — OK Tools, OK Video, OK Images, and more.
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