Free · no account · browser only
Compress PDF without uploading
Shrink one PDF or a batch. Larger preview, pick a preset with live estimates, download when ready. Zero upload.
Stays in your browser · nothing leaves this device
- Batch ZIPMulti-file · one preset
- Four presetsEst. chips when size known
- Larger previewAny page · enlarge
/compress-pdf
How it works
Shrink PDFs with presets, batch ZIP, progress, and download.
- 1
Drop PDFs
One file or many. Multi-file becomes a ZIP after compress.
- 2
Pick a preset
Basic · Balanced · Max · Strong.
- 3
Watch progress
Percent, file name, before/after size. No silent hang.
- 4
Download · Continue
ZIP or single PDF. Hop to Merge, Split, or PDF to Image.
Frequently Asked Questions
Answers about Compress PDF.
Do you upload my PDF?
No. Compression runs in your browser. Your file never leaves this device. The page may load app and worker code like any website. That is not your PDF upload.
What does Strong do?
Strong re-encodes embedded images in place for smaller scanned PDFs. It does not claim full-page raster.
Can I compress many PDFs at once?
Yes. Drop several PDFs and pick one preset. The download is a ZIP of the compressed files.
What if my PDF is password-protected?
This tool cannot process a password-protected PDF. Unlock it on PDF Password, then come back with the unlocked file.
Will quality stay readable?
Basic is a light shrink for files that are already optimized. Balanced keeps clear text. Max cuts size harder for email caps. Strong is for scans with embedded images.
Related tools
Files never leave your device · no account · browser only