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PixelFlow

Image DPI Converter

Check or change the DPI of an image and see the print size its resolution genuinely supports.

Drop your image here

or click to browse

Processed locally — never uploaded

Just inspect, do not change 72 DPI - screen 150 DPI 300 DPI - print 600 DPI - high quality

DPI is a hint for the printer. Setting it adds no detail to the image, and a high number on a low-resolution file is simply misleading.

How to use image dpi converter

  1. 1
    Add your image

    The panel reports its pixel dimensions, stored DPI, and the largest sensible print size at 300 DPI.

  2. 2
    Choose a new DPI if needed

    Pick a value to write into the file, or leave it on inspect to just read the current settings.

  3. 3
    Download

    The image itself is unchanged, so there is no quality loss at any point.

About image dpi converter

DPI converter shows the resolution of an image and the physical print size it genuinely supports, then writes a new DPI value into the file if you want to change it. Use it before sending a photo to a print shop, or when a service complains about resolution.

There is an important distinction between resolution and DPI. Resolution is how many pixels the image actually contains. DPI, dots per inch, is a number stored in the file telling software how large to make each pixel on paper. You can change the DPI number freely without touching a single pixel, which is exactly why changing it does not make an image any better.

If a photo is 1200 x 900 pixels, it holds enough detail to print at 4 x 3 inches at 300 DPI, or 16 x 12 inches at 75 DPI. That maximum sensible size is calculated from the real pixel count, and this tool shows it, which is far more useful than a single number. When a print shop says your image is not high enough resolution, this is the check to run first.

Frequently asked questions

What is a good DPI for printing?

300 DPI for anything printed at normal viewing distance, which covers nearly all photographs and documents. 150 DPI is acceptable for drafts and large prints viewed from a distance. 72 DPI is for screens only.

Does changing DPI improve image quality?

No. It only changes a number in the file that tells software the intended print size. The actual detail is fixed by the pixel count, which does not change.

How do I know if my image is big enough to print?

Divide the pixel width by 300. A 3000 pixel wide image supports about 10 inches at 300 DPI, or 40 inches at 75 DPI. This tool calculates that for you.

Does this tool resize the image?

No. It only inspects and rewrites resolution metadata. The pixels are untouched, so nothing is lost. Use a resize tool if you also need different dimensions.

Why does my image look different after I change the DPI?

Because a print shop or another program is now displaying it at the new physical size. A 1200 pixel image at 72 DPI prints 16 inches wide; the same image at 300 DPI prints 4 inches. Same pixels, different apparent size.

Are my files uploaded?

No. The metadata is read and rewritten entirely in your browser.

Related tools

Resize Image in cm and Inches Set an image to an exact physical print size such as 3.5 x 4.5 cm or 2 x 2 inches at 300 DPI. Resize Image Change image dimensions in pixels with the aspect ratio locked, so proportions stay correct. Image Metadata Viewer Inspect the hidden data in a photo: camera, lens, date, GPS coordinates and editing software. Compress Image Reduce JPG, PNG and WebP file size in your browser. No upload, no watermark, no signup. Page Size Converter See the pixel size and print size of standard paper formats, for A4, Letter, ID cards and social profiles. Passport Photo Maker Create a compliant ID or passport photo at 35x45mm, 600x600px or 2x2 inches, with a plain background. Crop Image Crop a picture by dragging a selection, with aspect ratio presets for squares, 16:9 and 4:3. EXIF Remover Strip GPS, camera and timestamp data from a photo before sharing it, in one click.

Private by design. Your files are processed on this device and are never uploaded to the 1xmobcas.com server. Use image dpi converter offline with total confidence.