What is the Compress PDF tool?
Compress PDF files online for free to reduce file size. Private, browser-based PDF compressor with no upload.
Shrink a PDF by re-rendering its pages as optimized images, with a quality slider you control. The whole job runs inside your web browser, so your documents are never uploaded to any server. That keeps private files such as contracts, invoices and ID scans completely on your own device.
How to use Compress PDF
- Click the upload box or drag your file(s) into it.
- Choose the options you need.
- Press the action button and wait a moment while your browser processes the file.
- Click Download to save the result.
Features
- 100% free — no limits, no watermark, no sign-up.
- Private — files never leave your device.
- Works everywhere — Windows, Mac, Linux, Android and iPhone.
- Fast — no waiting for uploads or downloads.
Frequently asked questions
Is Compress PDF safe?
Yes. Processing happens locally in your browser; nothing is sent to Toolsed.
Is there a file size limit?
There is no fixed limit, but very large PDFs depend on your device's memory and speed.
Does it work with password-protected PDFs?
Encrypted PDFs must be unlocked first before they can be edited.