Compress PDF
Reduce file size. Lossless keeps text selectable; stronger levels or a target size convert pages to images.
Use Compress PDF — freeRuns in your browser. Your files are not uploaded. Free account required.
How it works
- Open Compress PDF and log in (free).
- Drop your file in or choose it from your device.
- Adjust the options if you like, press the button and download the result.
Why use PDF World
- Private by design — on-device tools never upload your files.
- No watermarks and no hidden limits on file size for on-device tools.
- One place for everything — merge, split, compress, convert, edit, sign and more.
Frequently asked questions
Is Compress PDF free?
Yes. Compress PDF is free to use with a free PDF World account. Paid plans only raise limits such as batch size and the daily AI allowance.
Are my files uploaded?
No. This tool runs entirely in your browser, so your files never leave your device.
Do I need to create an account?
Yes — a free account is required to use the tools. It keeps the service safe from abuse. Sign-up takes a minute with your email.
Which files can I use?
PDF. You can process many files in one go with batch mode.
Will it add a watermark?
No. PDF World never adds watermarks to your results.