Compress images without ruining them

File size falls for three reasons: fewer pixels, a more efficient format, or a lower quality setting. Using all three at once is how images start to look soft. Change one thing, look at the result, then decide.

Start with dimensions

A 4000 pixel photo displayed at 800 pixels still carries the large file. Crop to the frame you actually need in the image cropper, then resize to the display size. That reduction is often bigger than any quality tweak, and it does not add blockiness by itself.

Then choose a format

JPG and WEBP respond to the quality slider. PNG does not, because the browser export is lossless. If a PNG is too large, convert it to WEBP or JPG in the image compressor and read the percentage saved. If the new file is larger, keep the original. That can happen when the source was already optimized.

How to judge quality

Look at edges: hair, text, product outlines, and flat skies. Those areas show artifacts first. A quality around 80 is a reasonable starting point for photos. Graphics with text usually need a higher setting or a lossless format.

Keep the original

Compression does not have an undo after you close the tab. Download the compressed copy and keep your source file. PixelConvert does not store either one.