Compress PDF
Shrink the size of a PDF without changing what it looks like. We rewrite the file structure and drop redundant data so your document is lighter to email, upload or archive.
Your files are processed in memory and deleted when finished. We don't store them unless you have a Pro account.
How Compress PDF works
- 1
Upload the PDF
Drop the file you want to compress.
- 2
We optimise it
We rewrite the structure and strip unused metadata.
- 3
Download the smaller file
Same visible content, smaller size — often 20–60% less.
Features of the Compress PDF tool
Visually identical
Text stays crisp, images keep their resolution.
Fast
Most files complete in under 3 seconds.
Safe with signed PDFs
Digital signatures stay valid where the tool can preserve them.
No install
Runs in the browser — no plug-ins, no queues.
Compress PDF — Frequently asked questions
How much smaller will my PDF be?
It depends on the source. Scanned PDFs shrink most; text-only PDFs least.
Will quality drop?
This tool does lossless structural optimisation only — no image re-encoding by default.
Are password-protected PDFs supported?
Not yet. Unlock the file first, then compress.
Can I compress many PDFs at once?
Currently one file per run. Batch mode is on our roadmap.