Reduce PDF file size without losing quality. Compress in your browser — free, private, no signup, no watermark.
Drop a PDF here or click to browse
Processed locally — nothing is uploaded.
Click the drop zone or drag in your file. It is read locally in your browser — nothing leaves your device.
Press "Compress PDF". The tool rebuilds the file with redundant data removed and objects stored efficiently.
See the before/after sizes side by side, then download the smaller file. Quality is unchanged.
Honesty first: there are two kinds of PDF compression. This tool does structural (lossless) compression — it removes duplicate objects, strips redundant metadata, and packs the file's internal data more tightly. Text and images are not re-encoded, so what you see is pixel-for-pixel identical to the original.
The other kind — image downsampling — re-encodes pictures at lower quality. That shrinks scans dramatically but visibly degrades them, and most free tools do it silently. We chose not to: a smaller file is useless if your scanned contract becomes unreadable.
Structural compression typically saves 5–30%. If your PDF is mostly full-page scans, the images themselves are the weight — no structural trick can shrink pixels. In that case:
Published by WorkIQ. Last reviewed: 13 October 2026. Files are processed locally in your browser and never uploaded.
It depends on the file. PDFs with redundant objects, uncompressed metadata, or duplicate resources typically shrink by 5–30%. Scanned image-heavy PDFs shrink less with structural compression; for those, reducing image size before creating the PDF works better.
No. This tool only reorganizes the file's internal structure — it removes redundant data and stores objects more efficiently. Text and images are not re-encoded, so visual quality stays exactly the same.
Yes. Compression happens entirely in your browser with JavaScript. Your file is never uploaded to a server, so private documents stay on your device.
The usual cause is large embedded images, especially full-page scans. Structural compression cannot shrink image pixels. For image-heavy PDFs, compress the images first and rebuild the PDF, or convert pages to JPG at a chosen quality.
No. Encrypted PDFs cannot be opened in the browser without the password. Remove the protection first (with the owner's permission), then compress.
Everything runs in your browser's memory, so very large files can slow things down. Files up to about 50 MB work reliably on most devices.
Yes, in any modern mobile browser. Pick the PDF from your device, compress, and download the smaller file.