Image
Compress Image
Reduce image file size and see exactly what it costs you. The quality slider updates a side-by-side preview and the resulting byte count as you move it, so you can stop at the point the loss becomes visible rather than guessing.
Runs entirely in your browser
Loading tool…
How it works
- 01Drop in the image you want to shrink.
- 02Move the quality slider — the preview and the real output size update as you go.
- 03Stop where the loss becomes visible, then download.
Questions
- Are my files uploaded anywhere?
- No. The file is read from your disk by the browser and processed in this tab using JavaScript and WebAssembly. Nothing is transmitted, which you can verify by opening your browser's network panel or by disconnecting from the internet — the tool keeps working.
- Is the size shown an estimate?
- No. The image is genuinely re-encoded at each quality setting, so the byte count you see is the file you will get. That is the point of the slider — a guess would make it useless.
- Why did my file get bigger?
- The source was already efficiently compressed, so re-encoding it adds overhead without removing anything. The tool says so rather than pretending it helped.
- Is there a catch — a limit, a watermark, a sign-up?
- None. Because the work happens on your machine rather than a server, there is no per-file cost to recover and therefore nothing to meter. No account, no queue, no watermark.