Compress a PNG to 100 KB
To be straight with you, PNG is lossless and cannot be pushed to an exact 100 KB while staying PNG. This tool converts your PNG to JPG to reach 100 KB, and transparent pixels are filled with a white background.
Drop images here or click to upload
PNG, JPG, WebP, GIF, AVIF, HEIC — up to 50MB each
Output lands at or under your target. JPEG and WebP only.
- Files never leave your device
- Runs in your browser
- Free, no signup
The honest reason this converts to JPG
PNG keeps every pixel exactly, with no quality to give up for a smaller file. That makes a precise 100 KB target impossible while the file stays PNG. JPG is lossy, so the tool converts to JPG and steps the quality down until the byte count matches 100 KB.
Because JPG has no alpha channel, transparency is replaced with a white background during the conversion. For a screenshot or a graphic on a solid color, that change is usually invisible, but for a cut-out logo it is not.
When you should not convert
If you need a genuine PNG out the other end, skip the conversion entirely. The compress PNG losslessly tool reduces the file without touching the pixels and keeps transparency. It will not pin the size to 100 KB, but it stays a true PNG.
If a JPG at 100 KB is acceptable, this page is a clean way to get a sharp, sensibly sized image. To pick a different target or to start from a JPG or WebP source, compress to any size lets you set the number.