Change Image DPI Free
Set the DPI recorded inside a JPG to 200, 300 or any value a form asks for.
How to use it
- Choose one or more images, or drag them in.
- Set the options on the right. The result updates as you change them.
- Check the result, then press Download.
About Change Image DPI
Some forms insist a scan be "200 DPI" or "300 DPI" and reject the file otherwise, even when the picture is exactly the right size in pixels. DPI is only a number recorded inside the file saying how large it should print. It has no effect on how the image looks on screen. This rewrites that number without re-encoding your picture.
Good to know
- Changing DPI does not change pixel dimensions, and barely changes file size. If a form wants both, set the pixels first and the DPI second.
- A scanner set to 200 DPI and a file tagged 200 DPI are different things. This fixes the tag, not how much detail was captured.
- 300 DPI is the usual request for documents meant to be printed; 200 DPI is common for exam uploads.
Questions
Will this make a blurry scan sharper?
No. DPI is a label, not detail. For a sharper file you have to scan or photograph again at a higher setting.
Why does the form care about DPI at all?
It expects a document scanned at a known quality, and the DPI tag is the only clue inside the file. Many checkers read the tag without examining the image.
Does this work on PNG as well as JPG?
The tool is built for JPG, which is what exam portals ask for. Convert a PNG to JPG first if the form needs one.
Is the picture re-compressed?
No. Only the few bytes holding the DPI value are rewritten, so there is no extra quality loss.
Is my file uploaded anywhere?
No. Everything runs inside your browser using your own device. Your file never leaves it, and we never see or store it. You can even disconnect from the internet and the tool still works.
Is it really free?
Yes. No account, no daily limit, no watermark on your files. The site is paid for by ads.