What this workspace does
A metadata-only density update, plus an honest pixel-versus-print-size explanation.
Image Inspector · browser local
Set image print density to 300 DPI
Set image density to 300 PPI locally without changing pixels. Use the resizer when you need more pixels instead of a metadata-only print-layout update.
Use it accurately
Changing 72 to 300 PPI does not create detail. It changes the suggested physical size at which the existing pixels are placed.
Private browser processing
Selected files are processed in the current browser session. Aftermath has no account, cloud file storage, or server-side file-processing job.
How to use this tool
Set print-density metadata on a separate local image copy when a destination asks for 300 DPI/PPI but the pixel canvas itself is already appropriate. The operation changes supported metadata and verifies the output without inventing extra pixels or image detail. Check the destination's actual pixel and format requirements as well as its density wording.
What to choose and what you get
What to choose
- one supported local image
Result
- a separately downloaded image copy with changed print-density metadata and unchanged pixels
Supported formats
- Accepted formats: JPG, PNG, WebP.
- Output formats: JPG, PNG, WebP.
Browser support and permissions
- Modern browser with JavaScript, a supported image decoder, and enough memory for the selected image.
- No camera, microphone, or screen permission is needed.
Worked example
A 1200-pixel-wide image needs a copy labelled 300 PPI for a print workflow while retaining the same pixel grid.
Starting facts
- The operation changes density metadata, not image detail.
- At 300 PPI, 1200 pixels nominally represent four inches.
Observed operation: Write a separate image copy with 300 PPI density metadata and keep the decoded width and height unchanged.
Review the result: Reopen the copy, confirm its pixels match the source and verify the new density and calculated physical size.
Boundary: Changing a density label cannot create pixels, improve sharpness or force another application to honor that print size.
Check your result
- Changing 72 to 300 PPI does not create detail. It changes the suggested physical size at which the existing pixels are placed.
Things to know
- The measured result still needs review against the intended destination or use.
Privacy boundary
The selected image stays in the current browser session and is not sent to an Aftermath processing service. How local processing is verified.
What this tool verifies
Checks the displayed limits and reports or creates a separately downloaded image copy with changed print-density metadata and unchanged pixels from one supported local image.
Check before sharing
A local measurement or export does not guarantee acceptance by an external destination.