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Image Resizer – Pixels, cm, mm or Inches with DPI
Forms describe sizes in different ways: “200 × 230 pixels”, “3.5 cm × 4.5 cm” or “2 × 2 inches at 300 DPI”. Enter the size in whichever unit your notification uses and get an image with exactly those pixels and the DPI value saved in the file.
Presets:
How to use the Image Resizer
- Choose an image. Its current size is shown.
- Pick a unit (pixels, cm, mm or inches) and enter the width and height; set DPI when using cm or inches.
- Choose how to fit: stretch to the exact size, fill and crop the centre, or fit inside with a border.
- Press Resize, check the preview and download.
Pixels = size in inches × DPI. For example 3.5 cm at 300 DPI is 413 pixels. The DPI you enter is written into JPG and PNG files, which some portals check. If the file is then too large in KB, run it through the Image Compressor.
🔒 Privacy: this tool runs entirely in your browser using JavaScript. Your files are never uploaded to Crop Desk or any other server, and you can even use it offline once the page has loaded.
Frequently asked questions
What DPI should I use for a passport photo?
300 DPI is standard for printing. Many online forms only check pixels and KB, so follow the numbers in your notification.
Why does my photo look stretched?
“Exact size” changes the proportions if the new shape differs from the original. Choose “Fill & crop centre” to keep faces natural.
Can I make a small image bigger?
Yes, but enlarging cannot add detail, so it may look soft.
Is the image uploaded?
No. Resizing is done in your browser.
Guides: How to Resize a Photo to 50 KB or 100 KB (Without Making It Blurry) · UK and Canada Passport Photo Size: 35 × 45 mm vs 50 × 70 mm · How to Crop a Signature for Online Forms (Clean, Clear and the Right Size)