Free · Open source · No upload
Get any file to the exact size you need.
Compress, convert and sign PDFs and photos in your browser. Your files are never uploaded.
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How it works
Choose a file
Select or drop a PDF or photo into the workspace.
Set your target
Pick an exact size limit or strength goal.
Download
Get your file instantly without leaving your browser.
Questions
Are my files sent to any server?
Is Weesize really completely free?
How does exact-size compression work?
Does it work offline?
Protect PDF
Get any file to the size you need. Privately.
1 Open this page and add the file. Protect PDF starts in the browser you already have open.2 Run the tool. If this version cannot do the job honestly, it says so instead of inventing a result.3 Download the file that was built on this device. Closing the tab drops the bytes.
About this tool
Protect PDF usually means encrypting the file with a password you choose. This version does not include that encryption, and it will not set a flag that a reader can ignore. A fake lock is worse than no lock: you might email a file you believe is closed. Use a desktop tool you can name, on this computer, if you need a real password. Do not upload the confidential file to test a website’s lock icon.
Protect PDF stays on this device. The download is the copy you keep, and Weesize does not store a second one. Close the tab when you are finished and the bytes are gone.
- No upload: the file is not uploaded in exchange for a lock icon this app cannot stand behind.
- Speed: the file does not travel to a server and back, so the wait is only the work itself.
- Quality: the original is kept when the new file would be worse or is not actually smaller.
FAQ
Does “Protect PDF” upload my file?
Protect PDF reads the file in this tab. There is no upload step and no account.
What will “Protect PDF” actually change?
No password is applied. An unprotected file stays unprotected, and the page tells you that.
When is “Protect PDF” the wrong job?
A mail-account password is not PDF encryption. Do not confuse the two.
How do I check the result of “Protect PDF”?
This page will not give you a locked file to test, because it did not lock one.
Can I run “Protect PDF” with Wi-Fi off?
Load this page, then turn Wi-Fi off and run Protect PDF again. A finished result is the proof that the file was not sent anywhere.
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How to password-protect a PDFRemove a PDF password you knowIs it safe to upload PDFs to online tools?
Last updated 2026-09-27.