Change Image Quality and Compression

It’s the JPEG or WebP encoder’s quality parameter – 100% means “minimum compression, largest file, best fidelity”, lower values allow the encoder to discard more detail in exchange for smaller files. Most web images use 75-85% as a good balance.

Above 70% the loss is typically invisible on photos. Below 50% you start to see blockiness on smooth gradients and ringing around sharp edges. The live preview helps you find the threshold for your specific image.

Dropping a 100% JPEG to 85% typically cuts 50-70% of the bytes with no visible loss. At 50% you can often cut 80-90%. WebP at the same visual quality is usually 25-35% smaller than the JPEG equivalent.

WebP uses a more modern codec (similar to VP8/VP9 video) and supports both lossy and lossless compression, plus transparency. For photographic content it’s typically 25-35% smaller than JPEG at the same visual quality. All modern browsers, iOS/Android, and major image editors support it.

PNG is a lossless codec – there is no “quality” dial in the JPEG sense. The tool still round-trips the image through a canvas so the output is a canonical PNG, which can still shrink oversized source PNGs by re-encoding.

75-85% is the sweet spot for body content. Hero images and product shots benefit from 85-90%. Thumbnails can drop to 60-70% without most users noticing. If you need an exact byte budget, adjust until the stats line shows the savings you need.

No. All compression runs in your browser with the HTML5 Canvas encoder. No network request touches your file, and the source is loaded only once into a local object URL.

No. Re-encoding at 100% preserves what is already there but cannot add detail that was lost at an earlier save. If the original was saved at 70%, the highest effective quality you can recover is 70%.

Yes – completely free, no watermarks, no registration, no file-size caps, no usage caps.

When the source was a heavily compressed JPEG and you re-encode at 100% JPEG – or when you go from compressed JPEG to lossless PNG – the output can be larger than the input. The stats line shows a negative savings percentage so you notice before downloading.