Compress Image to 40KB
Reduce any photo to 40KB or less in your browser — ready to upload.
To compress an image to 40KB, add the photo, keep the target at 40 KB and click Compress — the file comes out at 40KB or less.
About Compress Image to 40KB
40KB is a common limit for passport-size photos on application portals that allow up to 40KB. This tool compresses JPG, PNG and WebP images to 40KB or smaller by lowering quality and, only when needed, resolution — then shows the new size so you can check it before uploading. Everything runs on your device, so your photos stay private.
To compress an image to 40KB, add the photo, keep the target at 40 KB and click Compress — the file comes out at 40KB or less. You can compress up to 10 images at once and download them individually or as a ZIP.
How to use Compress Image to 40KB
- Click the upload box and choose up to 10 images (JPG, PNG or WebP).
- Check that the max size is set to 40 KB.
- Click Compress and wait a moment.
- Confirm each new size is under 40KB, then download the images or a ZIP.
Key features
- Target size preset to 40KB, with other sizes one click away.
- Save as JPG for the smallest files and the widest form compatibility.
- Shows the before and after size of every image.
- Runs in your browser — no upload, no sign-up, no watermark.
Common use cases
- Uploading a passport-size photo with a 40KB limit.
- Preparing photos for scholarship or admission forms.
- Shrinking a phone photo for an ID card application.