Most compressors flatten gradients into bands, bleed colour at edges and crush shadows. That is fatal for a beauty or fashion email. Kleer encodes at full colour resolution, then re-reads every pixel against your original and keeps shrinking only while the two stay identical.
The line walks across your image. Behind it, the compressed version is rebuilt and checked pixel by pixel. The counter shows what left the file.
Three failures you have seen in your inbox. Drag each line to compare the damage with the faithful version.
PNG optimisers quantise to a palette. Smooth skin becomes contour lines. Your sample came back with 168 colours.
Default JPEG stores colour at a quarter of the detail. Lipstick edges smear and red fabric fringes.
Aggressive quality settings flatten dark tones. Hair and shadows go from soft to solid black.
Your 900 × 838 campaign hero, run through the tool you were using and through Kleer. Error is the average difference per pixel channel, out of 255.
| File size | Colours kept | Mean error | Worst pixel | |
|---|---|---|---|---|
| Original PNG | 848 KB | all | 0 | 0 |
| Previous tool | 236 KB | 168 | 2.60 | 140 |
| Kleer, identical mode | 164 KB | all | 1.05 | 35 |