Reduce PDF file size for email attachments and faster uploads. Choose your compression level to balance quality and size. Works with any PDF — no software installation required.
Encrypted in transit · Auto-deleted after 60 min
Drag & drop your files
or click to browse from your device
Settings
Upload a file above to enable processing
How it works
How to compress a PDF online
- 1Upload your PDF file.
- 2Choose a compression level: maximum, balanced, or best quality.
- 3Click Process file to reduce the file size.
- 4Download the compressed PDF and compare the size reduction.
Why use this tool
- Upload PDFs up to 25 MB
- HTTPS encrypted file transfer
- 100% free — no signup, account, or watermarks
- Files automatically deleted after processing
- Works on desktop, tablet, and mobile browsers
Common use cases
- Shrink PDFs for email attachments
- Reduce upload size for online forms
- Save storage on shared drives
Privacy and file safety
Files uploaded to Compress PDF are transferred over HTTPS, processed on our servers, and automatically deleted after 60 minutes. We never share your files with third parties or use them for training. No account is required.
Supported formats and limits
.PDF files up to 25 MB
Maximum file size: 25 MB per file · Retention: files deleted after 60 minutes · No signup or watermarks · Free to use — supported by ads
Help
Frequently Asked Questions
Is this tool free to use?
Yes, all tools are completely free with no signup required. The site is supported by ads.
Are my files safe?
Yes. Files are processed securely and automatically deleted after a short retention period. We never share your files with third parties.
What is the maximum file size?
You can upload files up to 25MB per file.
How much can I compress a PDF?
Compression depends on the original content. PDFs with many images see the biggest size reduction.
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