Does this change my photo’s pixel dimensions?

No. DPI is a metadata tag describing intended print density — it doesn’t change the actual pixel width or height, or any visual quality.

Why doesn’t my JPG have a DPI tag at all?

Some cameras and editors omit it, defaulting effectively to no explicit density. This tool adds or overwrites that tag explicitly.

Home / Edit & Resize / Change Image DPI

EDIT & RESIZE

Change Image DPI

Set a print-resolution DPI tag on a JPG — free, instant, entirely on your device.

BEFORE

AFTER

Drop a JPG here

Nothing is uploaded to a server

Target DPI

How to change an image's DPI

Drop a JPG into the box above, choose 72 DPI for on-screen use or 300 DPI for print (or type any custom value), and download the result. The tool writes the DPI value directly into the JPG's JFIF metadata header.

For example, a print shop or publisher may reject a photo tagged at 72 DPI even if the pixel dimensions are large enough — tagging it at 300 DPI here satisfies that metadata check without altering a single pixel.

72 vs 300 DPI: what the number actually means

DPI (dots per inch) describes how densely pixels are meant to be printed — it does not change the pixel dimensions or visual quality of the file, only the physical print size implied by the metadata. 72 DPI is a long-standing web convention; 300 DPI is the standard expectation for sharp print output. Changing this tag doesn't add or remove image detail — it only relabels how the existing pixels should be interpreted for print.

What DPI actually changes

DPI — dots per inch — only affects how large an image prints, not how it looks on a screen or how many pixels it contains. A photo tagged at 72 DPI and the same photo tagged at 300 DPI display identically in a web browser, since screens read pixel dimensions, not the DPI metadata; the difference only becomes visible on paper, where a higher DPI packs the same pixels into a smaller physical area for a sharper print.

This is why print shops and publishing platforms often specifically ask for 300 DPI — it's simply the metadata tag they expect on submission, and changing it here satisfies that requirement without altering a single pixel of the actual image.

A metadata edit, not a resample

Because this tool only rewrites the DPI tag stored in the file's metadata, the operation is instant and completely lossless — there's no resampling, no recompression, and no change to the actual pixel grid, just an updated number in the header that print software reads.

This runs directly in your browser without any file leaving your device, which matters if the image in question is something you'd rather not upload to a third-party service just to satisfy a print shop's metadata requirement.