Need to resize your image to exact millimeter (mm) dimensions for printing, documents, or ID cards? Our free online tool lets you easily convert and resize your image to any width and height in mm with just a few clicks.
How to Resize Image In mm Online?
Select Image
Choose the image you want to resize from your device. We support PNG, JPG, JPEG, WEBP, and BMP formats.
Enter Size in mm
Set your desired width and height in mm. You can maintain the aspect ratio or enter custom dimensions.
Resize & Download
Click to resize the image instantly and download the new version with no quality loss.
Why Resize Image in mm?
Resizing an image in millimeters (mm) is crucial when preparing visuals for physical printing or manufacturing where precise dimensions matter. Unlike pixels, which refer to screen resolution and vary based on device display settings (like DPI or PPI), millimeters are a fixed physical unit of measurement. This makes mm ideal for ensuring that an image will print at exactly the right size—whether it’s for ID cards, passports, packaging, brochures, or labels.
For example, if you're designing a photo for a passport, most countries have strict dimension requirements, such as 35mm x 45mm. If the image is not resized in mm, it may not be accepted, even if it looks correct on-screen. Similarly, businesses printing logos, posters, or product mockups need consistent real-world sizes for professional results.
Using mm also aligns images with other physical design elements like paper sizes (A4, A5, etc.), die-cuts, or mold fittings. It removes the ambiguity that pixel dimensions introduce, especially when printers may use different DPI settings.
Frequently Asked Questions
To resize an image in cm without quality loss, use an image resizer that allows setting both centimeter dimensions and DPI (usually 300). This keeps the image sharp and ready for print or official use.
Yes, our tool uses smart compression techniques to reduce file size while maintaining the original image quality as much as possible, ideal for web uploads and faster sharing.
Our tool supports popular formats including JPG, PNG, WEBP, BMP, and GIF. You can easily convert any of these to your preferred format with just one click.
Yes, the maximum upload size is typically 10MB per image. For larger files, try compressing or resizing the image first before uploading.
Absolutely! Our tool allows resizing by mm, cm, or inches, which is especially useful for print-ready formats like passport photos, ID cards, and printed labels.
No installation is required. Our tool works entirely online in your browser, so you can resize, compress, and convert images directly without downloading any app.