Image DPI Viewer
Quickly check the DPI (dots per inch) metadata stored inside an image file's header. Important for print, scanning, and pre-press workflows.
What it reads
- PNG: parses the
pHYschunk and converts pixels-per-meter to DPI - JPEG: parses the JFIF APP0 segment density fields (DPI or DPCM)
Notes
- Many images have no DPI metadata; in that case the browser defaults to 96 DPI on screen.
- EXIF resolution fields are not parsed here — JFIF takes priority.
Use cases
- Verify print-ready resolution
- Diagnose print sizing issues
- Pre-press quality checks
- Photo scanning workflow validation
Processed locally — no upload.
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