Image Compressor - Reduce JPG, PNG & WebP File Size

Large images are the single biggest reason web pages load slowly, email attachments bounce, and upload forms reject your files. This image compressor reduces the file size of JPG, PNG, and WebP images directly in your browser, so you can hit a size limit or lighten a photo gallery in seconds without installing anything. Compression works in one of two modes. In target-file-size mode you tell the tool the maximum size you want in megabytes — for example 1 MB for a forum avatar or 0.5 MB for an email-friendly photo — and the compressor iteratively lowers the encoding quality and, if necessary, the resolution until the output fits under that ceiling. In quality mode you pick a quality level between 10 and 100 and the tool re-encodes each image at that setting; values between 70 and 85 usually look visually identical to the original while cutting the size dramatically. You can also cap the maximum width or height in pixels, which is often the most effective lever of all: a 6000-pixel-wide photo from a modern phone camera rarely needs more than 1920 pixels for screen use, and downscaling alone can remove most of the weight before any quality reduction is applied. Every step happens locally. The files you select are read with the browser's own File API, decoded onto an in-memory canvas, and re-encoded by the browser-image-compression library running as JavaScript on your machine. Nothing is uploaded to a server, no account is required, and closing the tab removes every trace of your photos. That makes the tool safe for private pictures, client work, identity documents, and anything else you would not want passing through a third-party server. A few practical notes. JPG is lossy and compresses photographs extremely well; PNG is lossless, so large photographic PNGs shrink most when you convert them to JPG or WebP using the output-format option. WebP typically produces the smallest files of the three at comparable visual quality, but very old software may not open it. Compression cannot add detail back — keep an original copy if you might need full resolution later — and extremely small size targets on detailed photos will show visible artifacts. If you just want a quick sanity check before processing a big batch, the savings estimator below the main tool projects the output size from your current file size and an expected compression ratio, entirely with simple arithmetic.