Free PDF Compressor – Reduce File Size Instantly in Your Browser
Shrink PDF files by 60-80% without visible quality loss. Perfect for email, web uploads, and saving storage. Works locally – no uploads, 100% private, no size limits.
Drop PDF here to compress
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Supports all PDF versions • No file size limit
document.pdf
Original size: 0 MB • 0 pages
Why Compress PDF Files?
Large PDFs are slow to share and take up valuable storage. Compression makes them email‑ready and upload‑friendly without sacrificing readability.
Email Ready
Most email services limit attachments to 25MB. Compression brings even large reports under the cap.
Faster Uploads
Smaller files upload 3‑5x faster to websites, cloud drives, and online forms.
Save Storage
Reduce storage costs by 60‑80% for document archives and cloud backups.
How PDF Compression Works
PDF compression intelligently optimizes images and removes redundant data. Our tool analyzes each image in your document and applies the best compression for that content type. Text remains sharp, vectors stay crisp, and fonts are preserved.
Choose Low for photography portfolios where quality is critical. Medium is ideal for business documents – excellent balance of size and quality. High gives maximum reduction for text‑heavy files or archival purposes.
Everything happens in your browser. Your PDF never leaves your device, ensuring absolute privacy.
Frequently Asked Questions About PDF Compression
Our compressor typically reduces PDFs by 60-80%. The exact reduction depends on content – image-heavy documents benefit most.
No visible loss with Standard compression. Text and vector graphics remain perfect. Only images are optimized, and you control the level.
Never. Compression happens entirely in your browser. Your file stays on your device – we cannot see or access it.
No artificial limit. You can compress PDFs as large as your device's memory allows, typically 2GB or more on modern computers.
Yes, the tool supports batch compression. Select multiple files to compress them all in one session.
Absolutely. Scanned PDFs (image-based) often see the biggest reductions because we optimize the embedded images intelligently.
Yes. Text layers are untouched and remain fully searchable. Only image data is compressed.
Yes, you'll be prompted for the password. The password is processed locally and never transmitted.
Yes, after the initial page load. The compressor works without internet – perfect for travel or secure environments.
Completely free. No limits, no watermarks, no premium tiers. Compress as many PDFs as you want.