Compress an image
Most of the weight is decided by the format, not by the quality slider. On our corpus a 1200×800 frame weighs 113 kB as JPEG, 85 kB as WebP and 45 kB as AVIF — at the same requested quality of 80. Changing the format buys more than any amount of slider tuning.
How to do it
- Pick an image, drag it in, or paste with Ctrl+V
- The format is already WebP — try AVIF too, it is about half again lighter
- Compare “Before” and “After”: the gain in percent is shown under the result
Frequently asked questions
- Which format should I pick?
- For the web, AVIF: 40% of JPEG’s weight. If the file is going to a person or into older software, pick WebP or JPEG — every current browser reads AVIF, but not everything else does.
- How far can I drop the quality?
- Below 60 the artefacts start showing on smooth gradients — sky, skin, shadows. Try changing the format first: JPEG to AVIF buys more than dropping quality from 80 to 50, and without anything visible.
- What if I need lossless?
- Then PNG — but on photographs it comes out roughly thirteen times larger than JPEG. Lossless makes sense for diagrams, screenshots and logos, not for photos.
- Does the pixel size change?
- No. The mode is “inside” with a bound larger than any photo and upscaling off, so the image passes through at its own resolution. Shrinking the sides is possible too, and that is usually where the biggest win is.