Compress a PDF Online — Reduce File Size Free
Shrink a large PDF for easier sharing, entirely in your browser. No uploads, no sign-up.
Is a PDF too big to email? Shrink it by resampling and recompressing its images, with the quality level up to you. Everything happens in your browser, so your documents never leave your device.
Who uses the compress tool
- Sending a document that's over an email attachment size limit.
- Speeding up an upload to a portal that caps file size.
- Saving space when archiving lots of scanned files.
Compress a PDF in 3 steps
- 1. Open the tool and upload your PDF.
- 2. Choose a quality level (balance size against sharpness).
- 3. Compress and download the smaller file.
Frequently asked questions
How much smaller will it get?
It depends on the content — files full of high-resolution images shrink a lot, while text-only files have less to compress.
Will image quality suffer?
Stronger compression lowers image resolution slightly; pick a higher quality level if sharpness matters.
Does text stay selectable after compressing?
Compression mainly targets images; in most cases the text is left as-is.
Is my file uploaded to compress it?
No — all the processing runs in your browser; nothing is uploaded.
Read the full step-by-step guide