Is my image uploaded to a server?

No. Compression happens entirely in your browser using the Canvas API — your image is never sent anywhere.

Which format compresses smallest?

WebP usually gives the smallest file size at a given quality, followed by JPG. PNG is lossless, so it compresses less but keeps every pixel exact.

Will compressing lose image quality?

JPG and WebP use adjustable lossy compression, so lower quality settings trade some visual detail for a smaller file. PNG output stays lossless.

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Image Compressor

Compress JPG, PNG, and WebP images right in your browser. Drag in a photo, choose an output format and quality level, and instantly see the new file size before you download — no upload, no waiting, no quality guesswork.

Drag & drop an image, or click to browse

JPG, PNG, or WebP · processed entirely in your browser

How to use Image Compressor

1Drag and drop an image, or click to browse and select one.
2Choose an output format (JPG, WebP, or PNG) and, for JPG/WebP, drag the quality slider.
3Compare the before-and-after preview and file sizes.
4Click "Download compressed image" to save the result.

Frequently asked questions

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