Compress PDF files in your browser.
Reduce PDF file size without uploading. Strip metadata, optimise object streams, and rebuild with cleaner structure, all happens locally.
Open compress tool →How to compress a PDF
- 1
Open the compress tool
Click the button above to load the tool instantly.
- 2
Drop your PDF
Drag a file in or browse. The tool shows current size and a preview.
- 3
Pick compression level
Low (best quality), Medium (balanced), or High (smallest size). Click compress and download.
How much smaller will it be?
Compression results depend on what's in your PDF. Typical reductions:
- Text-heavy PDFs: 10–25% smaller (already efficient)
- PDFs with metadata bloat: 30–50% smaller
- PDFs with redundant objects: 40–60% smaller (use High mode)
- Image-heavy PDFs: 5–15% smaller, for big savings, convert images first
SnapaPdf uses object stream compression and metadata stripping. We don't re-encode embedded images (that requires lossy compression that risks quality), so for scan-heavy documents your gains will be modest.
Why compress with SnapaPdf?
No upload step. A 100MB PDF that takes 4 minutes to upload to other compressors finishes here in seconds, your CPU does the work directly.
No file size limit. Compress 500MB PDFs as easily as 5MB ones.
Privacy. Sensitive contracts, medical records, financials, none of it leaves your device.
Free. No daily cap, no premium tier upsell, no watermark on output.
FAQ
Will compression ruin quality?
Low mode strips metadata only, quality identical. Medium and High rebuild the file structure without re-encoding images. Text and images look identical to the original.
Why didn't my PDF shrink much?
If most of the size is from embedded images, our compressor (which doesn't re-encode images) won't reduce much. For image-heavy PDFs, try converting pages to JPG with our PDF-to-images tool, then back to PDF.
Is the compressed file the same as the original?
Visually identical. Internally, redundant objects are removed and metadata is stripped. The file remains valid PDF/A-friendly.
Can I batch-compress multiple PDFs?
Yes. Drop multiple files into the compress tool, the batch banner appears and processes all in sequence.