Image Compressor
Make images smaller with a side-by-side preview and the real percentage saved. When an image cannot be improved, you are told plainly instead of handed a bigger file.
Converting a photographic PNG to JPG or WebP is usually the single biggest saving available.
75–85% is the usual sweet spot. Below 60% artefacts become visible in smooth areas.
How to use Image Compressor
- Add one or more JPG, PNG or WebP images.
- Choose an output format and a quality level.
- Compress, then compare the original and the result.
- Download the images you want to keep, individually or as a ZIP.
About this tool
Lossy formats — JPG and WebP — shrink files by discarding detail the eye is poor at noticing. The quality slider decides how aggressive that is. Between 75% and 85% is the sweet spot for photographs: large savings, and differences you have to hunt for. Below about 60%, smooth areas such as skies start to show blocking and banding.
PNG is lossless, so re-encoding it cannot throw detail away and often cannot save much either. The genuine win for a photographic PNG is converting it to JPG or WebP, which routinely cuts the file to a fraction of its original size. For screenshots, logos and flat-colour graphics, keep PNG — compressing those as JPG produces fuzzy text and coloured smears around edges.
Because re-encoding sometimes produces a larger file than the original, every result is measured and compared. If the output is bigger, that image is marked as not improved and the original is what you download — this tool never reports a saving that did not happen.
Frequently asked questions
What is the difference between lossy and lossless here?
Lossy output (JPG and WebP at any quality below 100) permanently discards image data to save space. Lossless output (PNG) keeps every pixel exactly and only repacks the file. Each result in the list is labelled with which one it is.
Should I convert my PNGs to WebP?
For photographs, almost always — the savings are large and support is universal in current browsers. For logos, icons and screenshots the difference is smaller, and PNG remains the safer choice if the file will be opened by older desktop software or placed in a document.
Can I compress the same image twice?
You can, but do not. Every lossy pass compounds the damage of the one before it, and the second pass usually saves far less than the first. Always start from the best original you have.
Does compressing strip metadata?
Yes. Re-encoding through a canvas drops EXIF data, including GPS coordinates and camera details, which is generally a good thing before publishing an image. It also means capture dates are lost, so keep originals if you rely on them.