Compress to size
Compress an image to 40KB
Compress any image to under 40KB — tighter than the common 50KB cap, with less softening than 20-30KB.
How to compress image to 40kb
Add your image
Drag in or tap to choose a JPG, PNG or WebP. Batches work too.
Confirm 40KB
The target is preset to 40KB — change it if your form needs a different cap.
Download
We keep the highest quality that still fits and hand it back instantly.
About this tool
Some passport, visa and exam portals set their photo limit just under the common 50KB mark — 40KB gives them a safety margin. This tool targets 40KB directly rather than making you guess how far below 50KB is "safe enough."
At 40KB you keep noticeably more sharpness than a 20 or 25KB result while still comfortably clearing stricter form limits. Processing stays entirely on your device throughout.
Questions
Does my image get uploaded?
No. Everything runs locally in your browser — the file never leaves your device.
Can I target a size other than 40KB?
Yes, change the target field to any KB value your form requires.
Which formats are supported?
JPG, PNG and WebP — the output keeps your original format. Note that PNG is lossless, so very tight targets rely on downscaling rather than quality reduction.