Compress JPG, PNG, and WebP images — 100% client-side, files never leave your browser
100% Private — Your images are processed entirely in your browser using HTML Canvas. Nothing is uploaded to any server.
Drop images here or click to browse
Supports JPG, PNG, WebP — multiple files allowed
Image Compressor reduces the file size of JPG, PNG, and WebP images directly in your browser using the HTML5 Canvas and native encoder APIs. You load one or more images, pick a quality level or target dimensions, and download the smaller versions without any upload to a server.
It is built for developers shrinking assets before deploying to a web server, bloggers trimming photos to speed up page loads, and anyone who needs to fit an image under an email or upload size limit. Because everything runs locally, it handles PNG screenshots, camera JPGs, and modern WebP files without leaving your machine.
The tool decodes each image into an off-screen HTML5 Canvas, then re-encodes it with the browser's built-in canvas.toBlob() method. For JPG and WebP, a quality argument between 0 and 1 controls lossy compression: lower values discard more high-frequency detail and produce smaller files. A quality of 0.8 is a common sweet spot that cuts file size substantially while remaining visually indistinguishable from the original for most photos.
PNG uses lossless compression, so the main size wins there come from resizing dimensions or converting to WebP, which supports both lossy and lossless modes and typically beats PNG and JPG at the same visual quality. Resizing multiplies the savings because file size scales roughly with pixel count: halving both width and height cuts the pixel count to one quarter. All decoding, resizing, and encoding happen on your device through standard browser APIs, so no bytes are transmitted anywhere.
Yes, it is completely free with no account required. Your images are processed entirely in your browser using local JavaScript and canvas APIs, so they are never uploaded to any server.
You can compress JPG/JPEG, PNG, and WebP. You can also convert between them, for example exporting a PNG or JPG as WebP to get a smaller file.
JPG and WebP use lossy compression controlled by the quality slider, which permanently discards some detail to save space. PNG is lossless, so its output keeps every pixel exactly and shrinks mainly through resizing or WebP conversion.
PNG is already lossless, so re-encoding at high quality yields little gain. To shrink it meaningfully, reduce the dimensions or convert it to WebP, which usually produces a much smaller file.
Not unless you set a maximum width or height. If you leave the resize options untouched, the pixel dimensions stay the same and only the encoding quality changes.
Yes. Drop or select several files, apply your settings, and use Download All to save every compressed image in one action.
Around 0.75 to 0.85 (75 to 85 on a 0-100 scale) usually gives a large size reduction with no visible loss on photos. Lower it further only if you need a specific small target size and can accept some artifacts.