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Image Dpi Changer

Update the PNG pHYs pixel-density chunk with the requested pixels per inch. PNG input and output only.

Free to useNo sign-upRuns in your browser
Enter your details

Enter the inputs, then select Process image.

Up to 10 MB; decoded images up to 20 million pixels and 10,000 pixels per side.

Your result
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Result will appear here

How Image Dpi Changer works

Update the PNG pHYs pixel-density chunk with the requested pixels per inch.

PNG input and output only. Compressed pixel bytes are preserved; no resampling or JPEG metadata editing. Applications may round the displayed density.

Concept diagram for Image Dpi Changer, showing source image input and the supported output.
Concept diagram; the three operation images are actual browser captures.

How to use Image Dpi Changer

Start with your own input.

Choose source image

Choose a supported local file. PNG input and output only.

Process image
Input and settings
Image Dpi Changer: input and settings in the implemented browser tool
Actual local browser view. Open the image to read it at full size.

Set the options

Set pixels per inch.

Process image
Tool result
Image Dpi Changer: tool result in the implemented browser tool
Actual local browser view. Open the image to read it at full size.

Run and check the output

Select Process image. Review an edited PNG file, then download the result file.

Process image
Review the details
Image Dpi Changer: review the details in the implemented browser tool
Actual local browser view. Open the image to read it at full size.

When to use Image Dpi Changer

Set PNG print-density metadata

To set PNG print-density metadata, start with source image. Update the PNG pHYs pixel-density chunk with the requested pixels per inch.

Process image
Color and image inputs represented by swatches and a pixel grid.
Start with the design input. Concept illustration.

Keep pixels while changing the print hint

To keep pixels while changing the print hint, start with source image. PNG input and output only.

Process image
Design samples shown side by side for comparison.
Compare the visual result. Concept illustration.

Inspect a PNG physical-size setting

To inspect a PNG physical-size setting, start with source image. Review an edited PNG file, then download the result file.

Process image
A visual asset prepared for use in a design workflow.
Prepare a design asset. Concept illustration.

How to read the result

Check what the output means.

An edited PNG file. Update the PNG pHYs pixel-density chunk with the requested pixels per inch.

PNG input and output only. Compressed pixel bytes are preserved; no resampling or JPEG metadata editing. Applications may round the displayed density.

Process imageProcess image
Color or image detail reviewed alongside its original input.
Inspect the output. Concept illustration.

Supported input and limits

Check the format before processing.

PNG input and output only. Compressed pixel bytes are preserved; no resampling or JPEG metadata editing. Applications may round the displayed density.

Inputs and results are handled in this browser.

Process imageProcess image
Design output inspected before use in a destination layout.
Check the intended use. Concept illustration.

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Process image with your input

Review an edited PNG file, then download the result file.

Process image

Image Dpi Changer: common questions

Answers about using Image Dpi Changer and understanding its results.

What does this tool support?

PNG input and output only. Compressed pixel bytes are preserved; no resampling or JPEG metadata editing. Applications may round the displayed density.

Can I save the result?

Yes. Download the result file after processing. Text results also have Copy result. Processing uses local browser code; no account is required.