Compress image to 40 KB
Make a photo smaller in KB, under any form's limit. Nothing is uploaded.
How to use it
Choose one or more images.
Pick a quality, or type the size you need in KB.
Download the smaller file.
What fits in 40 KB
| Picture | As JPG | As WebP |
|---|---|---|
| A detailed camera photo, 3:2 | about 680 by 450 px | about 770 by 510 px |
| A head-and-shoulders portrait, 3:4 | about 580 by 770 px | about 950 by 1260 px |
Measured at good quality (80 %) on two real photos. Plain backgrounds, signatures and drawings fit far more pixels; busy pictures, such as leaves or crowds, fewer.
When 40 KB is asked for
- Photos on job and admission forms that allow 20 to 50 KB.
- ID card and staff directory photos.
- Images inside email signatures, kept small so the email stays light.
Tips for 40 KB
- A head-and-shoulders photo of about 580 by 770 pixels stays clear at 40 KB, more than most forms ask for.
- Crop to the face and shoulders before compressing: background pixels cost KB too.
- Use the original photo, not a screenshot of it or a copy sent through a chat app.
- If the form gives a range, such as 20 to 50 KB, 40 KB keeps the most detail inside it.
Frequently asked questions
How do I resize or compress an image to 40 KB?
Choose your image and press Compress: on this page the size is already set to 40 KB. Then download the smaller file.
Will the file be exactly 40 KB?
As close as it can get without going over. ChobiKit tries different qualities and keeps the best one that stays under 40 KB, so the file may come out a little smaller.
Is 40 KB counted as 40,000 or 40,960 bytes?
Forms differ, so ChobiKit keeps the file under 40,000 bytes, which passes either way.
My form asks for 20 to 50 KB. What should I pick?
40 KB keeps the most detail while staying well inside the range. If the form also says a minimum, the file will be above it: ChobiKit gets as close to 40 KB as it can.
Why won't my image get under 40 KB?
It has too many pixels for 40 KB even at the lowest quality. ChobiKit then offers to make it smaller in pixels and tries again. Cropping away what you don't need helps too.
Is my image uploaded?
No. It is compressed in your browser and never sent to a server. It is free, with no sign-up and no watermark.