Compress Image Online — Free, No Upload
Compress JPG, PNG and WebP images right in your browser. No upload, no signup, no visible quality loss. Free and private.
How it works
Drop a photo in and get a smaller file back in about a second. There is no queue, no upload progress bar, and no file size cap — because your image never leaves your device.
Most online compressors send your photo to a remote server, process it there, then make you download the result. That round trip is slow, and it means a copy of your picture sits on someone else's disk. This tool does the same job locally using your browser's own canvas and image encoders, which is why it works even after you go offline.
How to use it
- Drag an image onto the box, or click to pick one from your device.
- Move the quality slider, or type a target width if you want to scale down at the same time.
- Watch the live preview and the before / after file size.
- Click Download to save the compressed image.
Why this runs in your browser
Every tool on this site runs 100% in your browser. Your files are never uploaded to any server. That means no upload wait, no third party holding a copy of your data, and it keeps working even if your connection drops.
Frequently asked questions
Is my image uploaded anywhere?
No. The entire compression happens in your browser using JavaScript and the Canvas API. Your file is read into memory on your own device and never sent over the network.
Why is browser-based compression better?
It is faster, because there is no upload or download step, and it is private, because no third party ever receives your photo. It also works offline once the page has loaded.
Does compression reduce image quality?
Yes, lossy compression always discards some data. The trick is finding the point where the file gets much smaller but the difference is hard to see. Start around quality 75 and drop lower only if you need to.
What image formats are supported?
JPG, PNG and WebP for input. You can export back to JPG, PNG or WebP depending on what you need.
Is there a file size limit?
No hard limit. Very large images take longer and use more memory, but since nothing is uploaded the only constraint is your own device.
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