Compress a PDF
Make a PDF smaller so it’s easier to email and upload. Free and private.
How to use Compress PDF
- Step 1Choose your PDF.
- Step 2Pick how much to shrink it.
- Step 3Download the smaller PDF.
Why use DoMyPDF’s Compress PDF
Free to use
Compress PDF is free for 3 files a day with no sign-up and no watermark. Premium removes the daily limit for heavy use.
Private by design
It runs inside your browser, so your file never leaves your phone or computer, and it keeps working on a slow connection.
Works on every device
Use it on iPhone, iPad, Mac or a Windows PC, in any modern browser. Nothing to install, and you can add DoMyPDF to your home screen.
Quality first
Gives you the result in seconds, with no watermark added to your pages.
Tips for the best result
- Compress PDF saves a new copy; your original file isn’t changed, so you can always start again.
- Before sharing a document with private details, use Redact PDF to remove them for good, then Lock PDF to add a password.
- Start with Recommended. If the file is still too big, try As much as possible and zoom in to check small print.
- Compressed pages are saved as pictures, so keep your original if you need to search or copy its text.
- Gmail stops attachments at 25 MB, and many job and admission portals allow far less, often 1 to 2 MB.
Compress PDF questions
Is Compress PDF free?
Yes. Every tool is free for 3 files a day, with no sign-up. Premium removes the daily limit.
Is my file safe?
Your file is processed inside your browser and is never uploaded.
Does Compress PDF work on iPhone, iPad and Mac?
Yes. Compress PDF works in Safari, Chrome, Edge and Firefox on iPhone, iPad, Mac and Windows computers, with nothing to install. You can also add DoMyPDF to your home screen to open it like an app.
Is there a file size limit?
No fixed limit: Compress PDF runs on your own device, so it handles files as large as your phone or computer can open. Very large files (over about 100 MB) can be slow on older phones.
Do I need an account?
No. There is no sign-up and no email needed. Open the tool, choose your file and download the result.