Compress Image Online (Free, No Upload)

Shrink an image's file size before emailing or uploading it. Drag the quality slider and watch the size update.

Drop an image here or click to choose

JPG, PNG, WebP, GIF, BMP · processed in your browser, never uploaded

How this tool works

Everything runs inside your browser using the built-in canvas and file APIs. The file you choose is never uploaded to Single Tab Browser or anyone else, there is no queue and no size cap other than your device's memory, and the page keeps working offline once it has loaded.

Frequently asked questions

Is this image compression tool free?

Yes. It is free, has no file limits beyond what your browser can handle, and needs no account.

Are my images uploaded anywhere?

No. The conversion happens inside your browser using the HTML canvas. Files never leave your device, which is why it also works offline once the page has loaded.

Why did my PNG get bigger?

PNG is lossless, so the quality slider does not apply. Choose JPG or WebP as the output format to actually shrink a PNG.

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