PDF Compressor

Drag your PDF onto the upload box above (or tap Browse Files to pick it from your device), choose a compression level, and press Compress PDF. The compressed file is ready to download in a few seconds. It is free, there is no sign-up, and there is no limit on how many files you can compress.

Text is never re-typeset or rasterised, so it stays perfectly sharp and still selectable at every level. Only embedded images are re-encoded. Low compression keeps images at full resolution, Medium reduces them enough for screens and everyday printing, and High trades visible image detail for the smallest possible file. If you are printing the document, choose Low or Medium.

You can upload PDF files up to 100MB. There is no page limit — a 300-page scanned document is fine as long as it is under 100MB.

Yes. Files are sent over an encrypted connection, processed on the server, and the original upload is deleted immediately afterwards. The compressed copy is kept only long enough for you to download it and is deleted automatically within 30 minutes. Nobody reads, stores or shares your documents, and no account is required.

No. Encrypted PDFs cannot be read without their password, so they cannot be compressed. Open the file in your PDF reader, remove the password (usually via Protect or Security settings), save a copy, and upload that copy instead.

Medium suits almost everyone — it typically cuts a scanned document by 50 to 80 percent while keeping it perfectly readable. Choose High when a form refuses your file for being over a 1MB or 2MB limit. Choose Low when the PDF will be printed and image detail matters more than file size.

PDFs that contain only text are already tiny and highly compressed, so there is very little left to remove — the savings come mostly from images. The same applies to a file that has already been through a compressor. When that happens we tell you the file is already optimised and hand back your original rather than degrading it for a fraction of a percent.

Yes. The tool is fully responsive and works in any modern mobile browser on Android and iOS, including picking a file straight from Google Drive, iCloud or your Downloads folder. Nothing needs to be installed.