How to compress a PDF for free
Make PDFs smaller for email and uploads — without a cloud compression site.
🚫 no upload
🌱 on-device
🆓 free
⚡ browser / Wasm
Steps
- Open Compress PDF.
- Drop the PDF you want to shrink.
- Run compression and wait for the local engine.
- Download and compare file size.
If the file is still large
- Compress embedded images separately when possible.
- Split huge binders with Split PDF.
- For photo-only packs, compress images then JPG to PDF.
Deep dive: compress PDF without uploading.
FAQs
Will text stay sharp?
Text-based PDFs usually fare well; heavy photo scans vary. Always preview.
Free limit?
No daily server quota on GroundPDF.
Safe for private docs?
Yes — no upload architecture.
Works offline?
After first load of assets, the PDF itself is not sent out to compress.