Compress Images to an Exact File Size
Tell us the KB you need — we binary-search the quality to hit it.
Open the tool →Free · No account · No upload · Open source
100% in your browser
Private — no upload
No watermark
Free & open source
How it works
- Drop your images.
- Type the target size in KB and pick JPG or WebP.
- Download files that actually fit your upload limit.
Why Nano Editor
- Private by design. The AI runs on your device with WebGPU — your images never leave your computer.
- Actually free. No account, no subscription, no watermark, no per-image cost.
- Part of a full studio. This tool is one node in a visual, node-based image editor — chain it with background removal, upscaling, generation and more.
- Open source. MIT-licensed on GitHub.
FAQ
How accurate is the target size?
We iteratively search the quality setting to land at or just under your target — the output name even shows the final KB.
Which format compresses smaller?
WebP usually beats JPG by 20-30% at the same visual quality.
Is it private?
Yes — compression runs entirely on your device.