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Change image DPI to 300

Printers and print shops often ask for 300 DPI. Drop your image below to set it, or resize it for an exact print size. Everything happens in your browser: nothing is uploaded.

Private by design: your files are processed in your browser and never uploaded.

Questions

Does changing the DPI reduce quality?

No. When you keep the pixel size, only a number stored in the file changes. Every pixel stays identical, so the image looks exactly the same.

Will 300 DPI make a blurry image sharp?

No tool can add detail that is not there. 300 DPI tells the printer how big to print your pixels. If the image is too small for the size you want, use the resize option or start from a larger original.

Is my image uploaded anywhere?

No. The file is processed by your own browser and never sent to a server.

How to change an image to 300 DPI

  1. Drop your JPG or PNG in the box above, or click to choose it.
  2. Leave the DPI at 300, or type the value your printer asked for.
  3. Choose “Only change the DPI” to keep every pixel, or “Resize” to fit an exact print size.
  4. Click Download. You get the same image with the new resolution saved in the file.

What actually changes

An image is made of pixels. DPI is just a note inside the file that says how many of those pixels go in one inch of paper. Changing 72 to 300 DPI keeps the pixels and tells the printer to pack them tighter, so the print gets smaller and sharper.

For example, a 3000 × 2400 pixel photo prints at about 41 × 33 inches at 72 DPI, but at a crisp 10 × 8 inches at 300 DPI. Same file, same pixels, different print size.

When you need to resize instead

If your image does not have enough pixels for the size you want, the print will look soft at 300 DPI. Use the resize option to hit an exact size, but keep in mind that enlarging cannot invent detail. For big prints, the best fix is a larger original. Not sure? Check your image first, or see the pixels needed for each print size.