Set image DPI metadata.
Choose a DPI value and export a PNG with matching physical-pixel metadata. Pixel dimensions stay the same; only metadata changes.
Local processing. Measurement, resizing, encoding, and ZIP creation happen in this tab; selected images are not sent to imgrove. Privacy details
Result will appear here
How to use Set Image DPI
- Drop an image and enter the DPI value to write into PNG metadata.
- Review the unchanged pixel dimensions and estimated print size at the target DPI.
- Download the PNG with the chosen DPI metadata.
How it works
- The tool writes DPI metadata without changing pixel dimensions.
- Print size is calculated from pixels divided by DPI so users can see the practical result.
Formats and limits
| Input | PNG, JPG, and browser-readable images. |
|---|---|
| Output | PNG or JPG with DPI metadata where supported by the export path. |
| Transparency | Preserved for PNG; flattened for JPG. |
| Animation | Animated input becomes a still image. |
| Metadata | Only DPI-related metadata is intentionally written; other metadata may be removed. |
| Batch and browser | Single image workflow; no server upload. |
Real failure cases
- DPI does not add pixels or make a low-resolution image printable at large sizes.
- Some websites ignore DPI metadata and only check pixel dimensions.
- Not every app displays DPI metadata the same way.
Example result to verify
| Original | 1200x1800 image. |
|---|---|
| Target | 300 DPI metadata. |
| Output | Pixels remain 1200x1800; print estimate is 4.00 x 6.00 inches. |
| Verify | Use the printed-size estimate and a metadata viewer before sending to print. |
Best for
- Adding 300 DPI metadata before print workflows.
- Checking how DPI metadata affects office or design tools.
- Keeping pixel dimensions unchanged while setting physical resolution metadata.
What you get
- A PNG with a pHYs chunk matching the chosen DPI.
- A print-size estimate calculated from pixel dimensions and target DPI.
Before you download
- DPI metadata does not add real pixel detail.
- This tool exports PNG rather than editing every original file format in place.