Image Resolution Changer
Set a picture to a standard resolution such as HD or 4K.
Image DPI Changer
Change the DPI recorded in a picture, for printing.
Drop your files here
or
Choose filesAccepts JPG and PNG · up to 25 MB · up to 20 files
Processing locally…
Privacy. This tool works entirely inside your browser. Your file is never sent to us, never saved, and never seen by anyone else. Read how we handle files
DPI is a note stored inside the image file telling a printer how large to print each pixel. On a screen it has no effect at all — a 1000 pixel wide image is 1000 pixels wide whether it says 72 DPI or 300.
So changing the DPI without resampling does not alter the picture in any way. It changes only the size it will print at. The same 1200 pixel image prints 4 inches wide at 300 DPI and 16 inches wide at 75 DPI.
That is what people usually need when a print shop or a submission portal says "the image must be 300 DPI". Tick "also change the pixels" only if you want the picture genuinely resampled to a new pixel size as well, which does change the image.
How to use it
- Choose your files, or drag them onto the box above.
- Press the button to start.
- Download the result. Nothing is kept once you leave the page.
Files it accepts
- JPG
- PNG
- Up to 25 MB per file
- Up to 20 files at once
Questions
Does changing the DPI improve quality?
No. It changes the printed size, not the detail. A blurry photo stays blurry at 300 DPI; it just prints smaller.
A portal says my image must be 300 DPI.
Set 300 here and leave the resample box unticked. The pixels are untouched and the file now declares 300 DPI.
What is the difference between DPI and PPI?
In everyday use, none — both describe dots or pixels per inch. Printers tend to say DPI, screens PPI.
Is this tool free?
Yes. Every tool here is free, and you do not need an account, an email address or a phone number.
Is my file uploaded to your server?
No. This tool runs inside your own browser, so the file never leaves your phone or computer. Once the page has loaded you can even switch off your internet connection and the tool will still work.
Which files can I use?
This tool accepts JPG and PNG. The largest file it will take is 25 MB.