Compress PDF
Reduce PDF file size in your browser. Files never leave your device.
Drop a PDF here
or click to browse
How to use
- 1
Drop your PDF or click to browse.
- 2
Pick a compression level — low, medium or high.
- 3
Download your smaller PDF instantly.
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Free PDF Compressor — Reduce PDF File Size Online
Skycally's PDF Compressor reduces the file size of your PDF documents while maintaining acceptable quality. Choose from three compression levels: Low (best quality), Medium (balanced), or High (smallest size). The compression runs entirely in your browser using pdf-lib — your files never leave your device. Free, private, and instant.
Frequently Asked Questions
How much can the file size be reduced?
Depending on the PDF content, you can reduce file size by 20% to 70%.
Will compression affect text quality?
Text remains sharp at all compression levels. Only embedded images are compressed.
What is the maximum file size supported?
For best performance, we recommend PDFs under 50MB.
Is my PDF uploaded to a server?
No. Compression runs entirely in your browser using pdf-lib.
Can I compress password-protected PDFs?
Password-protected PDFs are not currently supported.