Photo & document essentials / 04
Inspect an image before uploading it to a form or sending it to print. See what the file actually contains, and what its pixels can cover on paper.
Up to 20 MiB, 24 megapixels and 12,000 pixels per side. Format is identified from file contents. Unsupported or corrupt images are rejected.
Choose an image to begin.
300 is a starting estimate, not a value read from your file. Enter 1–2,400 pixels per inch. This calculation uses displayed dimensions and equal horizontal/vertical resolution; it does not edit the image.
Choose an image to estimate its print size.
Download inspection report · TXTThe report contains dimensions, density results and your print estimate. It excludes your filename, photo, GPS and camera details.
Your image preview will appear here.
X × Y refers to the stored image axes, before orientation. We show all supported density tags, including disagreements. The preview assumes square pixels and follows your browser’s orientation handling.
Your file stays on your device. We read dimensions and selected metadata in browser memory. The image is never uploaded or modified; no source metadata is copied into a new image.
A 1,200 × 1,800 pixel image contains the same number of pixels whether its density tag says 72 or 300 DPI. File size in KB measures storage, not image dimensions or sharpness.
DPI metadata suggests a physical scale. It can be absent, inconsistent or left at an application default. Changing that tag alone does not add pixels or recover missing detail.
Divide pixels by pixels per inch to estimate inches. At 300 PPI, a 1,200 × 1,800 image covers 4 × 6 inches (101.6 × 152.4 mm). At 150 PPI it covers 8 × 12 inches, using the same pixels.
JPEG JFIF density and primary-image EXIF resolution, PNG pHYs and primary-image EXIF, and WebP primary-image EXIF. Values in centimetres or metres are converted to pixels per inch. XMP, thumbnail tags and other formats are not inspected. “No supported DPI metadata” does not mean the image has no pixels.
Images are measured in pixels per inch (PPI); printers place dots per inch (DPI). Image software commonly labels density metadata “DPI”, so we use that familiar label for tags and PPI for the print calculation. Neither measurement alone guarantees a sharp print.
A camera can store a landscape pixel grid with an EXIF tag asking viewers to rotate it. The stored dimensions describe that grid; displayed dimensions describe the browser-decoded image after orientation. The print estimate uses displayed dimensions.
No. Inspection and print-size estimates do not change the original. A larger source or a smaller print can help when there are too few pixels. Check focus, compression and fine detail as well as dimensions.
Arrange your images at physical sizes with the Photo Print Sheet Maker, align a crop with the Passport & ID Photo Maker, or meet a file-size limit with the Image Compressor.
Keep things moving