Compress PDF online, free

Shrink a PDF for email or an upload form. Pick a level, or a size it has to fit under.

Compress PDF: common questions

Can I make a PDF smaller than 200 KB?

Yes. Choose "Fit under a size" and pick 100, 200 or 500 KB, or type your own limit. ScalePDF lowers image quality step by step until the file fits.

Is there a limit on how many PDFs I can compress?

No. There is no daily or monthly limit and no account, and it stays free for life: use it as often as you like. Files up to 50 MB in all are processed on ScalePDF’s server; bigger ones are processed right on your device, which can take a little longer.

Will my text stay selectable?

With Balanced and Strong it does: only the pictures inside the PDF are re-saved. "Fit under a size" tries that first too, and only turns pages into images when the file still doesn’t fit; then text can no longer be selected.

Is my file uploaded?

Only while it is being processed. Your file goes to ScalePDF’s server over an encrypted connection, is worked on in memory, and is deleted the moment the result comes back. Nothing is stored, logged or shared.