Image Compressor

How image compression works

Image compression reduces a file's size by storing the same picture with fewer bytes. This tool compresses JPEG, PNG, WebP, and GIF images in bulk, and can also resize them, convert between formats, and strip metadata. Smaller images load faster, save bandwidth, and improve page-speed scores, which matters for both user experience and SEO.

Lossy vs. lossless compression

Lossy compression (JPEG, WebP) discards detail the eye is unlikely to notice in exchange for much smaller files; quality is controlled by a setting, and pushing it too low introduces visible artefacts. Lossless compression (PNG, and lossless WebP) preserves every pixel exactly but saves less. Use lossy for photographs and lossless for graphics, logos, and screenshots with sharp edges and flat colour.

Choosing a quality setting

For most photos, a quality around 75 to 85 strikes the best balance: the file shrinks dramatically while the image still looks crisp. Below about 60 you start to see blocky artefacts. The right value depends on the image and how large it will be displayed, so compare the preview and the size readout and pick the lowest quality that still looks good to you.

Privacy and EXIF metadata

Photos often carry hidden EXIF metadata, including the camera model and, for phone photos, GPS coordinates of where the picture was taken. This tool can strip that metadata, which both shrinks the file and protects your privacy before you share an image publicly. Compression runs entirely in your browser, so your images are never uploaded to a server.