Three clear levels
Recommended keeps text sharp. Smaller squeezes pictures harder. Smallest turns pages into pictures for the lowest size.
🗜️
Compress PDF
Shrink a PDF's file size for easier sharing and uploading.
🔒 Enterprise privacy — 100% client-side, no server uploads
📤
Drop your PDF here, or click to browse
🔒 Processed on your device — never uploaded, never stored.
What is Compress PDF?
Compress PDF is a free online tool that lets you shrink a PDF's file size for easier sharing and uploading. It works in your web browser with no signup. Add your PDF, choose your options and download the result. Your files stay on your device and are never uploaded.
Also searched as: reduce PDF size, shrink a PDF, make a PDF smaller, PDF compressor.
Compress PDF at a glance
- Price
- Free, with no paid plans
- Account
- No signup or login needed
- Where it runs
- In your web browser
- Your data
- Files are not uploaded to a server
- Works on
- Any modern browser, on desktop and mobile
- Category
- Document & PDF Suite
When to use Compress PDF
- →Get a PDF under an email attachment limit
- →Meet the file size limit on an upload form
- →Save storage space on a phone or drive
How to use Compress PDF
- 1
Open the Compress PDF page and drop your PDF into the upload box, or click it to browse your device.
- 2
Adjust any options this tool needs — page numbers, rotation angle, or watermark text, depending on the tool.
- 3
Click the process button and watch the on-screen progress as your file is handled entirely in your browser.
- 4
Download the finished PDF straight to your device — nothing is kept on a server afterward.
Why use Compress PDF
- ✓Runs entirely in your browser — your file is never uploaded to a server.
- ✓No account, signup, or email address required to use it.
- ✓Completely free, with no daily limit and no signup.
- ✓Works the same on Windows, Mac, Linux, and Chromebooks — anything with a modern browser.
Compress PDF
Make a PDF smaller without guessing
Pick how much to shrink: a balanced option, a stronger one, or the smallest possible file. You see the result before you send it.
Text stays sharp on most levels
On Recommended and Smaller the text stays selectable and crisp. Only the pictures inside the PDF are compressed.
Progress you can follow
Large files show how many pages have been processed, so you always know it is working.
Private by design
Your PDF is compressed on your own device. It is never uploaded.
Any device, any browser
Shrink a PDF on your phone before you attach it to an application or email.
No signup, no limits on use
No account and no daily cap. Compress as many files as you need.
Everything you need in Compress PDF
- Three compression levels to choose from
- Text stays selectable on Recommended and Smaller
- Page-by-page progress on larger files
- Compressed on your device, not on a server
- Download the smaller PDF straight away
- Useful for email and upload size limits
- No watermark added to your PDF
- Free and no account needed
Tips for better results
- 1
Start with Recommended
Try the balanced level first. Only move to Smaller or Smallest if the file is still too big.
- 2
Smallest turns pages into pictures
That level gives the lowest size but the text can no longer be selected or searched. Keep your original.
- 3
Text-heavy PDFs shrink less
Files made of mostly text are already small. Big savings usually come from PDFs full of photos and scans.
0files uploaded
0signups needed
0cost to use
Tutorials on Compress PDF
Short, practical guides that go with this tool.
🔒 Your privacy with Compress PDF
Compress PDF runs as client-side JavaScript inside your own browser tab. Your file or text is read, processed, and turned into a result on your device — it is never sent to, stored on, or seen by Toolkitties' servers. Closing or refreshing the page clears everything.
Frequently asked questions
Which compression level should I choose?
Start with Recommended. If the file is still too large, try Smaller. Use Smallest only when size matters more than selectable text.
Can I still select text after compressing?
On Recommended and Smaller, yes. On Smallest, pages become pictures, so the text cannot be selected.
How do I compress a PDF for an email attachment?
Add the PDF, keep the Recommended level, compress and download. If it is still over your email limit, try the Smaller level.
Why did my PDF barely get smaller?
PDFs that are mostly text have little to compress. The biggest savings come from files with large photos or scanned pages.
Is my original file changed?
No. You download a new, smaller file and the original on your device stays exactly as it was.
Is it safe to compress a private document here?
The work happens in your browser and the file is not uploaded to Toolkitties, so it is a good fit for private documents.
Is Compress PDF free to use?
Yes. Compress PDF is 100% free, with no signup, no daily limit and no paid plans.
Do I need to create an account to use Compress PDF?
No signup or login is required. Open the page and start using Compress PDF immediately.
Is it safe to use Compress PDF with private or sensitive files?
Yes. Compress PDF processes your file locally in your browser using client-side code. The file itself is never uploaded to Toolkitties' servers.
Will Compress PDF work on a large PDF?
Most PDFs process in a few seconds. Very large files (100+ MB) depend on your device's memory, since everything happens in your browser rather than on a remote server.