Image DPI Viewer / Changer
Read or change the DPI tag.
🖨Image DPI Viewer / Changer
All processing happens locallyWhat this tool does
Image DPI Viewer / Changer is a Image DPI Viewer / Changer that returns results as soon as you pick a file; nothing leaves your machine., the image is processed entirely inside your browser and never uploaded anywhere, so your files stay private.
Download the result directly; multiple images are handled in turn and offered as a zip or one by one.
How to use it
- Paste or type your content into the input field at the top, or press the sample button to load demo data.
- Adjust the options below the input, such as output format, separators, letter case or precision.
- Press the main button to run the conversion. Results appear instantly in the output panel without a page reload.
- When the result looks right, use the copy button in the corner, or download it as a local file.
Tips and notes
Clean up stray spaces and line breaks before pasting for more accurate results.
FAQ
No. DPI only records how many pixels go into an inch when printed. Pixels stay the same; the physical print size changes.
300 dpi is the baseline for crisp print. What matters is pixels ÷ DPI = print inches; rewriting the tag alone adds no detail.
Yes. The tool writes a new density field into the JFIF APP0 segment, which is standard and does not re-encode pixels.
Yes. The tool is completely free with no usage limits, and you never need an account or a sign-in.
No. All processing runs locally in your browser, so the input never reaches a server and is never logged or stored.
Yes. The layout is mobile-first, so inputs and buttons stay comfortable on phones and tablets in both orientations.
Yes. A copy button in the output panel puts the result on your clipboard, and you can also download it as a text file.