Compress image to 400 KB
Need a image under 400 KB? Drop it below and PhotoReducer finds the highest quality that fits the limit — automatically, and without uploading anything.
Drop images here or click to browse
JPG, PNG, WebP, AVIF, HEIC, GIF, BMP · processed on your device, never uploaded
How the 400 KB limit is reached
PhotoReducer tries different quality levels and keeps the best one whose file stays under 400 KB. Most photos reach this limit through compression alone, keeping their original dimensions.
Who asks for 400 KB files?
Editorial blog headers, portfolio hero images, and press kit photos need enough resolution to hold up on a large monitor without dragging down page load times. 400 KB keeps gradients and fine detail smooth for photography-heavy sites that still care about Core Web Vitals.
Frequently asked questions
Will the image still look good at 400 KB?
At this size the difference from the original is usually invisible on screen — most photos keep their full dimensions.
Does it change the format of my file?
The output is JPG by default — the format virtually every form accepts — and you can switch to WebP. JPG, PNG, WebP and AVIF are accepted as input.
Is my photo uploaded anywhere?
No. Everything runs locally in your browser with WebAssembly — your image never leaves your device, which makes this safe even for ID photos and documents.