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?
Compress PDF without uploading
Get any file to the size you need. Privately.
1 Open this page and add the file. Compress PDF without uploading 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
The compressor is a script in this page. The PDF stays in memory. There is no form that posts the file to an API. After the app is ready, the network log should show no other origin. You can watch that, which is the claim.
Compress PDF without uploading 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 privacy claim is that no upload request exists for the file.
- 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 “Compress PDF without uploading” upload my file?
Compress PDF without uploading reads the file in this tab. There is no upload step and no account.
What will “Compress PDF without uploading” actually change?
Compress PDF without uploading runs only the named tool. A privacy page does not add a hidden converter.
When is “Compress PDF without uploading” the wrong job?
Leave any site that copies the promise of Compress PDF without uploading and then shows a bar labeled uploading.
How do I check the result of “Compress PDF without uploading”?
After Compress PDF without uploading is ready, the network panel should not gain a new origin. Then open the download and read it.
Can I run “Compress PDF without uploading” with Wi-Fi off?
Load this page, then turn Wi-Fi off and run Compress PDF without uploading again. A finished result is the proof that the file was not sent anywhere.
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Last updated 2026-09-27.