Image Compressor

Photographs straight from a phone or camera are far larger than a web page, an email attachment or a form upload needs them to be. This re-encodes each image at a lower quality setting, discarding the fine detail the eye is least sensitive to, and shows the result against the original so you can judge the trade-off rather than guess at it. Several images can be processed at once and downloaded individually or as a ZIP. Decoding and re-encoding both happen inside the page, so the original file is never sent anywhere. The behaviour to plan around is that JPEG and WebP compression is lossy and cumulative: compressing an already-compressed image degrades it again, so always work from the original rather than repeatedly squeezing the same file. PNGs gain much less, being lossless already, and very large batches are bounded by your device's memory.