Check Image DPI
DPI (dots per inch) tells printers how big to print an image. It doesn't change the pixels, but forms and print shops often ask for 300 DPI.
- Never uploaded
- Instant, no sign-up
- Works offline
About this tool
This tool reads the DPI written in your file (JFIF, PNG or EXIF) and shows the print size at common resolutions so you know what you'll get on paper.
How it works
- 1
Add an image (or try the sample).
- 2
The report appears instantly.
- 3
Copy the values you need — nothing is uploaded or changed.
Features
- Reads every sourceJPEG JFIF density, PNG pHYs and EXIF resolution.
- Print sizesCentimeters and inches at 72, 150, 300 and 600 DPI.
- Plain-language notesExplains what DPI does and doesn't affect.
- Private by designEverything runs on your device. No uploads, no account, no watermark, and EXIF/GPS data is stripped from the result.
Supported formats
Input: JPG, PNG, WebP, GIF, BMP, SVG, AVIF, plus TIFF/HEIC where your browser can decode them. Nothing is changed or downloaded — it's a read-only check.
Frequently asked questions
Does changing DPI improve quality?
No. Quality depends on pixel dimensions. DPI only sets the printed size.
How do I make my image 300 DPI?
Use the Passport Photo Maker or photo tools that set DPI, or just make sure you have enough pixels: width in inches × 300.
Why does my image have no DPI?
Many apps and screenshots don't store one. Software then assumes 72 or 96.
Are my images uploaded to a server?
No. Files are decoded, processed and re-encoded by your browser using the canvas API and Web Workers. Nothing is sent to any server, and there is no account or storage. Closing the tab discards everything.
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