Does changing DPI improve quality?

No. Pixel dimensions and visual detail stay unchanged unless an image is separately resampled.

Is the DPI actually written?

Yes. The tool writes JFIF density metadata for JPEG or a pHYs resolution chunk for PNG.

Image Utility

Change Image DPI

Set real JPEG or PNG resolution metadata without resampling. Your files stay on your device during processing.

Private local processing

Your file stays in this browser.

Keep working

Related tools

Favicon Generator

Build a complete browser and app icon pack from one image.

Open tool

Image Metadata Viewer

Inspect EXIF, camera and GPS metadata privately.

Open tool

Image Color Picker

Tap any image pixel to copy its HEX, RGB and HSL color.

Open tool

Image Color Palette

Extract a useful dominant color palette from an image.

Open tool

About Change Image DPI

Write real DPI resolution metadata into a JPEG or PNG file without resampling or changing its pixel dimensions.

DPI metadata tells print software how densely to place existing pixels. Changing it does not create new detail or improve a low-resolution image.

What the result contains

A separate result that set real JPEG or PNG resolution metadata without resampling. The source remains unchanged in the current browser session.

Supported formats

How to use Change Image DPI

Choose a source file in a supported format (JPEG, PNG) and confirm the displayed file details.
Prepare the available controls for this practical goal: Meet a print shop's required DPI metadata before submitting a file
Run Change Image DPI and confirm that the new result matches the stated outcome before saving it.
Check this known constraint before download: Changing DPI does not add pixels or improve image quality; it only affects how print software interprets existing pixels If needed, revise the settings and create another version from the retained source.

Practical example

Meet a print shop's required DPI metadata before submitting a file. Use a representative source, compare the output with the original, and keep the version that meets the destination's requirements.

When to use Change Image DPI

Meet a print shop's required DPI metadata before submitting a file
Correct DPI metadata on a scanned or exported image
Prepare an image for a publishing workflow that checks DPI

Important limitations

Changing DPI does not add pixels or improve image quality; it only affects how print software interprets existing pixels
Only JPEG and PNG files are supported

Troubleshooting Change Image DPI

The result is different from what you expected

Changing DPI does not add pixels or improve image quality; it only affects how print software interprets existing pixels Return to the retained source, adjust the relevant setting and create a fresh result rather than repeatedly processing the output.

Private local processing

The file is processed on this device and is not uploaded to MyFileNest. Closing or refreshing the page clears the active session.

Frequently asked questions

Practical limit: Files up to 25 MB are accepted for guests. Very large dimensions, complex documents or limited device memory can affect browser processing.