Compress Image to KB Without Changing Its Size
Use this when the form only says "maximum 50 KB" or similar and does not ask for exact pixels.
- Free, no login
- Files stay on your phone
- Works on mobile
When you only need a smaller file
Some upload boxes don't care about width and height. They only say "maximum 100 KB" or "file size should be less than 50 KB". For those, changing the pixel size is unnecessary and can even make text in a document harder to read. This page keeps your image the same shape and only lowers the KB.
The tool starts at the highest JPG quality and steps down until the file fits your limit, so you get the clearest image that is still small enough. If the photo is very large, it also brings the longest side down to 1600 pixels, which is more than enough for any form and saves a lot of KB.
How to compress an image to a KB limit
- Make sure Keep original size is on.
- Type the maximum KB. If the form also has a minimum, type that too.
- Choose your image and crop away anything you don't need, like the table edge around a document.
- Press Create file and download the result.
Popular limits
- Resize image to 20KB for signatures and small photos
- Resize image to 50KB, the most common photo limit
- Resize image to 100KB for documents and declarations
- Resize image to 200KB for NTA forms like NEET and JEE
Compress or resize: which one do you need?
Read the upload instructions once more. If they mention pixels, centimetres or "dimensions", you need the photo resize tool, because the shape and pixel count must match. If they only mention KB or MB, compressing is enough and keeps your image looking natural.
A simple test: if you upload a compressed file and the portal says "invalid dimensions", switch to resizing. If it says "file size too large", you need a smaller KB limit here.
How small can a photo go before it looks bad?
That depends on the pixel size. A passport style photo around 400 pixels wide looks fine at 30 to 50 KB. A full phone photo of a document, around 1600 pixels wide, needs about 150 to 300 KB to keep small text sharp. If you need a document under 100 KB, crop it tightly first so the space goes to the text, not to the table around it.
Is compressing safe for exam uploads?
Yes. The result is a standard JPG that opens anywhere. The tool does not add watermarks, and because everything happens in your browser, the file is never uploaded to us or anyone else.
Frequently asked questions
Can I compress a PNG to JPG under a KB limit?
Yes. Choose the PNG and the tool saves the result as JPG, with any transparent area turned white.
Why is my compressed file slightly bigger than another site's?
This tool keeps the highest quality that fits your limit, so the file uses the space you allowed instead of being needlessly blurry.
Can I compress a PDF here?
For PDFs use the PDF compress tool. It reduces each page and joins several files if needed.