Is my PDF uploaded to a server?

No. Compression happens entirely in your browser using JavaScript. Your file never leaves your device.

How much can I reduce my PDF size?

It depends on the content. PDFs with many images can shrink by 30–70%. Text-only PDFs may see little reduction since they are already compact.

Will compression reduce quality?

Light compression has minimal quality impact. Balanced is a good trade-off. Maximum compression reduces image quality noticeably but produces the smallest file.

compressFree · No account · 100% browser

Compress PDF

Reduce your PDF file size without sending it to any server. Everything runs locally in your browser.

Step 1 — Choose PDF

picture_as_pdf

Drop your PDF here

or click to browse · max 200 MB

Step 2 — Compression Level

lockNever uploaded

devicesWorks offline

no_accountsNo account needed

How it works

Signvert's free PDF compressor reduces your file size entirely in your browser using pdf-lib — no uploads, no accounts, no waiting. Upload your PDF, choose a compression level (Light, Balanced, or Maximum), and click Compress. The tool re-encodes the document with tighter object streams and optimised image data, then shows you the before and after file sizes so you can see exactly how much space was saved.

Frequently asked questions

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