Compress PDF Files
Free, instant, no sign-up
100% client-side processing · No data sent to any server · Unlimited compressions
Want to process PDFs via API?
Integrate AI-powered document extraction into your workflow. Build automations, batch-process hundreds of documents, and get structured JSON output with custom schemas.
Need more PDF tools? Merge PDFs, Split PDFs, or Rotate PDF pages. Or extract data with PDF to Excel.
Why use this PDF compressor
Private & secure
Your PDF is processed entirely in your browser. Files never leave your device.
No sign-up required
Use it instantly in your browser. No account, no email, no nonsense.
Free & unlimited
No limits, no watermarks, no paywalls. Compress as many PDFs as you want.
How it works
Upload your PDF
Drag and drop your PDF file or click to browse. Up to 50 MB.
Compress
The tool optimizes object streams and strips metadata to reduce file size automatically.
Download
See before and after sizes, then download your smaller PDF file.
Note: This tool uses lossless compression — it optimizes PDF structure without reducing image quality. Already-optimized PDFs may not see significant size reduction. For advanced document processing, try Parsli AI.
Works great with
Compress your PDFs before merging, splitting, or sharing them. Combine this tool with our PDF Merger to combine compressed files, or use our PDF Splitter to extract specific pages from a compressed document.
Try Parsli AI for document extraction
Need to extract data from your PDFs — not just compress them? Parsli uses Google's Gemini AI to pull structured data from invoices, receipts, contracts, and any document type. Define a custom schema, and the AI extracts exactly the fields you need.
Extracted data flows automatically to Google Sheets, Zapier, Make, webhooks, or your own API. No coding required.
Perfect for
Business Users
Optimize PDF reports and proposals for faster sharing, archival, and portal uploads.
Students
Compress lecture notes, assignments, and research papers to save storage and meet upload limits.
Email Senders
Reduce PDF size to stay under email attachment limits and send documents faster.
Admin Teams
Batch-compress documents for internal distribution, compliance archives, and shared drives.
Frequently asked questions
Is this PDF compressor really free?
Yes, completely free with no limits. There are no hidden charges, no watermarks, and no sign-up required. We built this as a free utility for the community.
Do you store or upload my PDF files?
No. Your PDF is processed entirely in your browser using JavaScript. The file never leaves your device and is never sent to any server. Your data stays 100% private.
How much can this tool reduce file size?
Results vary depending on the PDF. Files with unnecessary metadata, redundant objects, or unoptimized structures see the best results. Already-optimized PDFs may not shrink much.
Will compression affect the quality of my PDF?
No. This tool uses lossless optimization — it reorganizes internal structures and removes unnecessary metadata. Text, images, and layout remain unchanged.
Why didn't my PDF get smaller?
Some PDFs are already well-optimized. If the file was created by modern software and doesn't have excess metadata, there may be little room for further compression.
Does this work with scanned PDFs?
Yes, but the compression primarily targets PDF structure, not embedded images. Scanned PDFs with large images may not see significant size reduction with this tool.
What's the difference between this and Parsli?
This free tool compresses PDF files. Parsli is a full AI-powered document extraction platform — it extracts structured data from documents and connects to Google Sheets, Zapier, Make, and 5,000+ apps.
Can I compress a PDF on my phone?
Yes. This tool works on iPhone, iPad, and Android devices. Open the page in your mobile browser, upload your PDF, and download the compressed file directly.
How to Compress a PDF for Free
Compressing PDF files is essential for sharing documents via email, uploading to portals with size limits, or simply saving disk space. A good PDF compressor reduces file size without sacrificing document quality.
Most online compressors upload your files to remote servers. This tool is different — it runs entirely in your browser. Your PDF is processed on your device and never sent anywhere. It's completely free, with no limits on the number of compressions.
PDF Compressor: Free Tool vs AI Extraction
| Feature | Free Tool | Parsli AI |
|---|---|---|
| Compress PDF files | Yes | N/A |
| Extract data from PDFs | No | Yes |
| Scanned PDFs / images | No | Yes |
| Custom extraction schema | No | Yes |
| Automated workflows | No | Yes |
| Google Sheets integration | No | Yes |
| API access | No | Yes |
| Price | Free | Free tier + paid plans |
Works everywhere — no install needed
Desktop
Chrome, Firefox, Safari, Edge
Mobile
iOS, Android
Tablet
iPad, Android tablets
Stop fighting with PDF file size limits.
Parsli extracts structured data from any document — PDFs, images, scans, emails. Define custom schemas and automate with integrations. Free forever up to 30 pages/month.
No credit card required · 30 free pages/month