Compress PDF files — free, private, instant.
Reduce your PDF file size without uploading to any server. Choose from 4 compression levels — all processing happens in your browser. No account required.
Frequently asked questions
How do I compress a PDF for free?
Drop your PDF into the tool above, choose a compression level (Screen for smallest size, eBook for a good balance, Print or High for better quality), then click Compress PDF. Your compressed file downloads instantly — no account needed.
Are my PDF files uploaded to a server?
No. All compression happens entirely in your browser using JavaScript. Your PDF never leaves your device and is never sent to any server.
What compression levels are available?
Four levels: Screen (72 DPI, smallest file), eBook (96 DPI, good balance), Print (120 DPI, higher quality), and High (150 DPI, best quality). Lower settings produce smaller files but reduce visual quality.
Will compressing a PDF affect text quality?
Squish Files compresses PDFs by re-rendering each page as an image at a lower resolution. Text won't be selectable in the output. Print and High settings preserve more visual detail than Screen or eBook.
What is the maximum PDF file size?
You can compress PDFs up to 200MB. Processing happens in your browser, so speed depends on your device and the number of pages.