FREEPROCESSED LOCALLY
Your data stays in your browser.
PDF compressor
Reduce how large your PDF is before email, uploads, or sharing. The tool rewrites the PDF structure locally — your file never leaves your device. Best for documents with redundant objects or heavy metadata, not for scanned photo books.
How to use
- Choose a PDF from your device.
- Click Compress and wait for local optimization.
- Compare file sizes and download the smaller PDF.
What the tool does
Optimizes the PDF bytes in your browser to remove unnecessary overhead and produce a smaller downloadable file when possible.
What the tool does not do
Does not run aggressive image recompression like desktop tools, OCR scans, or unlock encrypted PDFs.
Tips
- Scanned PDFs are mostly images — size reduction may be modest compared to text-heavy files.
- Keep the original if you need maximum quality for print.
- Try merging or splitting first if you only need part of a large document.
FAQ
- How do I compress a PDF online for free?
- Select your PDF and run Compress. When optimization helps, download the smaller file from your browser.
- Is my PDF uploaded?
- No. Compression runs entirely on your device.
- Will compression always make the file smaller?
- Not always — already-optimized PDFs may see little change. The tool shows before and after sizes.
- Does it reduce image quality?
- This tool focuses on structural optimization, not heavy image downsampling.
- Is the PDF compressor free?
- Yes — free, no account required.
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