Fast & effective
Upload your PDF and get a compressed result in seconds. No manual tuning required for everyday documents.
Nén PDF
Giảm dung lượng. Tự xóa trong 1 giờ.
Xử lý trên máy chủ — tự động xóa trong 1 giờ
Thả tệp vào đây hoặc nhấp để duyệt
Mức nén
Tối đa 50 MB mỗi lô
Compress PDFs online for quick sharing, fast uploads, and optimal storage — quality intact. Free to use, files auto-deleted within one hour.
- Reduce PDF size for email & uploads
- HTTPS encrypted transfer
- Auto-deleted within 1 hour
Shrink PDF Size, Preserve Quality
Compress PDF reduces file size while keeping documents readable — ideal for email attachments, portals, and cloud storage.
Large PDFs hit attachment limits and slow down uploads. Our compressor analyzes your document, optimizes images, and removes redundant data to deliver a smaller file you can share immediately.
Compression runs on secure PDF900 servers over HTTPS. We never sell your data, and uploaded files are automatically deleted within one hour — privacy built in, not bolted on.
Why compress with PDF900
Smaller files, readable output
We balance size reduction with legible text and acceptable image quality — not a blurry mess.
Secure compression
TLS encryption in transit, automatic deletion after processing, and a privacy-first product philosophy.
How to compress a PDF online for free
- 1
Drag & drop your PDF into the compressor above (or click to browse).
- 2
Click “Compress PDF” and wait while we optimize your file.
- 3
Download the compressed PDF when processing completes.
- 4
Need more? Edit, merge, or protect the result with other PDF900 tools.
Everything you need in a PDF compressor
Start immediately
No install or signup — upload, compress, download.
Any device
Compress from desktop or mobile via any modern browser.
Email-ready
Smaller files fit attachment limits more easily.
Auto-deletion
Server files removed within one hour.
Free to use
No Pro paywall — PDF900 is free to use.
Contract Pack ready
Compress before watermark and sign in one flow.
Câu hỏi thường gặp
- Is PDF900's compressor free?
- Yes — completely free, no signup required.
- Will compression affect fonts or quality?
- Text and fonts stay consistent; images are optimized for size.
- How long are files kept?
- Uploaded files are automatically deleted within one hour.
- Why is compression server-side?
- Advanced compression needs more CPU than browsers reliably provide.
- Is the tool safe to use?
- Yes — HTTPS encryption and automatic deletion protect your documents.
- How does PDF compression work?
- We analyze the file, optimize images, and remove redundant PDF data streams.