Every major platform can show an image's resolution, but where to look — and what it actually shows — differs by device. Windows and Mac expose DPI metadata through file properties; iPhone and Android generally don't expose it at all in their built-in apps. The one method that works identically everywhere is opening the file in a browser-based tool that reads the metadata directly.
Skip the OS-specific steps — check DPI the same way on any device, right in your browser.
Open DPI CheckerThis only appears for formats and files that carry the metadata — JPEGs saved from cameras and editors usually show it; PNGs, screenshots, and web-downloaded images often don't. The exact tab layout can differ slightly between Windows versions.
Finder's regular "Get Info" panel does not show DPI — you need Preview's inspector specifically. As with Windows, this depends on the file actually having density metadata to show.
iOS does not expose an image's embedded DPI/PPI value in either the Photos or Files app. The Files app can show an image's pixel dimensions: select the file, tap the More (•••) button, then Info — this lists width and height in pixels, along with file size. That tells you how much detail the image has, but not what DPI value (if any) is stored in it. For that, use a browser-based reader instead.
Similarly, Android's built-in Photos and file-manager apps typically show an image's pixel dimensions— usually under a "Details" or "Properties" option reached from the app's menu — but explicit DPI/PPI metadata is inconsistently exposed, and varies by device manufacturer, Android version, and which gallery or file-manager app is installed. If your device doesn't show it, that's normal, not a fault in the file.
Because built-in DPI display is inconsistent — especially on mobile — the most dependable approach on any device is a tool that reads the file's metadata directly. Open yesdpi.com/dpi-checkerin any modern browser, choose or drop your image, and it reads the JFIF, EXIF, or PNG density fields the same way regardless of whether you're on Windows, macOS, iOS, or Android. Nothing is installed, and the file is never uploaded — it's read locally in the browser.
A DPI value — wherever you find it — is metadata, not a guarantee of quality, and it's a separate thing from an image's pixel dimensions. If a file shows no DPI at all, that usually just means one was never set; it's common for screenshots and web graphics. And the DPI value stored in a file only tells you the print size the file currentlyassumes — to know what DPI you'll actually get for a specific print, you need both the image's pixel dimensions and your intended print size.
Work out the real print DPI from your image's pixel size and your target print size.
Open Print Size CalculatorNo. Both only display a resolution value if the file actually has one stored in its metadata, and support varies by file format — JPEGs are more likely to show a value than PNGs or screenshots. A missing field usually just means no DPI was ever set, not a system error.
Not reliably through the built-in Photos or file-management apps — most mobile operating systems show pixel dimensions but don't surface embedded DPI/PPI metadata in their standard UI. A browser-based tool like the DPI Checker works the same way on mobile as on desktop, with no app to install.
It means the file was saved without density metadata, which is common for screenshots, web images, and photos from some cameras and apps. It's not an error — you can still set a DPI value later if a print shop or platform requires one.
Real print DPI depends on both the image's pixel dimensions and the physical size you print it at — DPI = pixel width ÷ print width in inches. Check your image's pixel dimensions, then use the Print Size Calculator with your intended print size to get the actual figure.
Menu names, icons, and navigation paths change across operating system and app versions and between device manufacturers. The general locations described here are common as of recent versions, but if a menu looks different, that's a version difference, not a mistake.
Yes — the DPI Checker reads the same underlying JFIF, EXIF, or PNG metadata fields a desktop app would, directly from the file, entirely on your device.
