Resize Image to KB: Free Online Compressor
Many online forms reject an image that is over a set file size, such as 20 KB, 50 KB or 100 KB. Enter the limit your form gives and pick the image: this tool saves it as a JPG at or below that size.
JPG, PNG or WebP · you can also paste (Ctrl+V)
It keeps the image's shape. It first lowers JPEG quality, choosing the highest quality that still fits, and only reduces the pixel dimensions when quality alone cannot reach the limit. Images wider than 1600 pixels are scaled down to 1600 first. Everything happens in your browser, so the file never leaves your device.
How to compress an image to a KB size
- Type the limit from your form into Target file size, for example 20, 50 or 100 KB.
- Pick the photo or scanned document.
- Check that the file size line shows ✅, then tap Download.
If the form also gives a pixel size, use its own page instead so the shape is right too, for example the SSC photo or IBPS signature tools, or browse all exam photo and signature sizes.
Common mistakes
- Uploading the original phone photo, which is usually 2 to 5 MB, far above most form limits.
- Compressing so hard that text or a face becomes blurry. Start from a sharp, well-lit photo, and crop away empty space first.
- Saving as PNG when the form asks for JPG or JPEG.
- Meeting the KB limit but not the pixel size. If the form gives pixels or a shape too, use that document's own page.
Frequently asked questions
How do I reduce a photo to 50 KB (or 20 KB, 100 KB)?
Type the number into Target file size, pick the photo, then download the JPG. The file size line shows ✅ when it fits.
Will the quality drop?
A little, because smaller files hold less detail. The tool keeps the highest quality that still fits the limit.
What if my form also has a minimum size?
This tool only sets a maximum. For forms with a range, such as 20 to 50 KB, use that form's own page on this site, which keeps the file inside the range.
Is my photo uploaded to a server?
No. Resizing, compression, face detection and background removal all run inside your browser. The photo never leaves your device and nothing is stored.
How do I resize a photo for the Resize Image to KB online?
Pick your photo in the tool on this page, adjust zoom so the face is centred, then download the JPG. It is free and works on any phone or computer.