Image Compressor

How it works

Lower quality settings allow the JPEG encoder to discard more fine detail, which shrinks the file size at the cost of some visual sharpness — usually barely noticeable above 60-70% quality, more visible below 40%. This tool always saves as JPEG, since quality-based compression is a JPEG feature that PNG (a lossless format) doesn't have.

Choosing a quality level

• 80-95% — visually near-identical to the original, modest size reduction
• 50-80% — a good balance for web use and email attachments
• Below 40% — noticeable quality loss, useful only when file size matters most

Things to watch for

• Transparency is lost. JPEG has no transparent areas, so transparent parts of a PNG will typically come out black. For logos or cutouts, keep the PNG or convert it with the Image Format Converter instead.
• The result can occasionally be larger than the original, for example with a PNG screenshot of flat colors or a JPEG that was already compressed harder than your chosen setting. Compare the two sizes shown before you download.
• The slider runs from 10% to 95% and starts at 70%. Try a couple of values, since the same setting shrinks a detailed photo less than a smooth one.
• Camera metadata such as location is not carried into the new file as a side effect of re-saving.

Size and privacy

Images up to 50 MB are accepted. The compression is done by your browser, so the picture is never uploaded, and the width and height stay exactly as they were.