Why compress to this size?
100 KB comfortably fits a resume photo or profile picture with room for good detail, while staying well under most upload limits.
About PNG compression
PNG is lossless and has no quality setting, so hitting a small target relies on reducing the image's dimensions instead. PNG tends to suit screenshots and flat-color graphics better than photos.
Frequently asked questions
How do I compress a PNG to 100 KB?
Drop your file into the tool above, make sure the target is set to 100 KB (PNG), then click Compress image. The file downloads straight to your device once it's done — nothing is uploaded to get there.
Will this reduce image quality?
PNG compression here works by reducing dimensions rather than quality, since PNG has no lossy quality setting — so a very small target can mean a visibly smaller image. For photos, JPG or WebP usually keeps more detail at the same file size.
Is this really free and private?
Yes. There's no account, no ads, and no upload — the image is compressed using your own browser and never leaves your device.
Compressing more than one? Try Bulk Compress