Batch compress PDFs online, free
Add several PDFs and run a safe, lossless re-save on each one. Download them individually or as a ZIP. Everything runs in your browser.
Files are processed locally in your browser and are not uploaded to a server. No account, no watermark, no tracking.
How to use it
- Open the Batch Compress tool and add your PDFs.
- Click Compress all to optimize each file.
- Download individual files, a ZIP, or a summary.
Good to know
- Safe optimization only — no rasterization or image recompression.
- Not every PDF can be reduced; already-optimized files may not shrink.
- Large batches depend on your device's memory.
Privacy & honesty
Your documents stay on your device — LocalSign has no servers that receive your files. Signatures, stamps, highlights, shapes, and other annotations are visual changes created by you. LocalSign does not verify, certify, notarize, or legally validate documents.