Compress an image to 15 KB
A 15 KB cap is the kind of strict limit you see on government signature fields and tiny avatar slots. The tool below is set to 15 KB and finds the quality that hits it.
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
What survives at 15 KB
15 KB is firmly thumbnail territory. A tightly cropped headshot or a signature stays legible, but a full scene with lots of detail will look noticeably soft at this size.
If 15 KB squeezes your image too far, crop closer first, or compress to a slightly larger target like 25 or 50 KB where the form allows it.
How the tool lands on the number
JPG quality is a dial, not a switch. The tool steps it down and re-checks the file size until the result sits at or just under 15 KB, so you never have to guess a quality percentage.
Everything runs in your browser. Even a scanned signature or ID never uploads, so it stays on your device the whole time.