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 image to 1 MB
Get any file to the size you need. Privately.
1 Drop the picture. The format and size goal on this page are already chosen.2 The browser encodes a new file. The original on disk is not overwritten.3 Read the status line for the size you got, then look at the subject before you send it.
About this tool
One megabyte tames a large phone shot while keeping room to edit. It is the wrong target for an avatar. The tool resizes only when the long edge is above its working maximum, then encodes, and tells you the size it reached.
Compress image to 1 MB 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 pixels never go to an image host.
- 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 image to 1 MB” upload my file?
Compress image to 1 MB reads the file in this tab. There is no upload step and no account.
What will “Compress image to 1 MB” actually change?
Compress image to 1 MB writes a new file. JPEG and WebP can lose detail on purpose. PNG gets smaller by having fewer pixels.
When is “Compress image to 1 MB” the wrong job?
Skip Compress image to 1 MB when you still need the camera original for print or for an edit you have not done.
How do I check the result of “Compress image to 1 MB”?
Open the Compress image to 1 MB download beside the original. Ringing edges mean you should use a larger target.
Can I run “Compress image to 1 MB” with Wi-Fi off?
Load this page, then turn Wi-Fi off and run Compress image to 1 MB again. A finished result is the proof that the file was not sent anywhere.
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Last updated 2026-09-27.