Exact Millimeter Sizing
Type the width and height in mm and the image is resized to that exact physical size at 200 DPI.
Resize Image in MM Online Free
Resize an image to exact millimeter dimensions right in your browser. Set the width and height in mm, lock the aspect ratio so it does not stretch, set a target file size in KB, and use the 35x45 mm passport preset and more. Downloads as JPG. No upload, no sign-up.
Guide
How to Resize an Image in MM
1
Upload Your Image
Drag and drop your image or click to choose one. Its current size in mm fills in automatically.
2
Set the MM Size
Enter the width and height in mm or tap a preset like 35x45. Lock the aspect ratio to keep the shape, and set a target KB if a form needs it.
3
Download at 200 DPI
Click Download Image to save the resized JPG at 200 DPI, ready for a form upload or print.
Resize an Image to Exact Millimeters for Photos and Print
Passport and visa photos, print layouts, and signage are usually measured in millimeters. The most common photo size is 35×45 mm, which is what Indian passport, PAN, and most visa forms ask for. This resizer converts your image to the exact mm dimensions you need, rendered at 200 DPI, so it comes out at the right physical size. Type the width and height in mm or tap a preset, then download.
When a portal or print shop caps the file size, set the target in KB. The default is your uploaded file size, so lower it to compress further. The tool tunes the JPEG quality and, if needed, the dimensions, then matches your exact target on the first try. Lock the aspect ratio to keep faces and shapes from stretching when you change one side.
Everything runs in your browser, whether you are here in India or anywhere else, so the image never leaves your device. To check sharpness before you print, run the file through the DPI checker, and use the signature resizer when a form wants the signature at a set mm size too.
Benefits
Why Use Our MM Image Resizer?
35x45 mm Preset
One tap sets the standard 35x45 mm passport and visa photo size, plus presets for 50x50, 100x150, A6, and A4.
Lock Aspect Ratio
Keep the original shape so faces and objects do not stretch when you change one side.
Hit a Target KB
Set a file size and the tool compresses to match it, handy for passport and exam portals with a size cap.
Ready for Print
Output at 200 DPI matches common photo and document print needs at the right physical size.
Fully Private
Everything runs in your browser. The image is never uploaded to a server or seen by anyone.
Explore More
Similar Tools
More Image tools you might find useful.
FAQ
Frequently Asked Questions
Common questions about resizing images in millimeters.
How do I resize an image in millimeters?
Upload your image, type the width and height in mm or tap a preset, and click Download Image. The tool renders it at 200 DPI so it prints at the exact size. It is free and runs in your browser.
What is the 35x45 mm photo size?
35 by 45 mm is the standard passport and visa photo size used by Indian passport, PAN, and many visa forms. Tap the 35x45 preset and download at 200 DPI to get a 276 by 354 pixel photo at the right size.
How are millimeters converted to pixels?
The tool uses 200 DPI, so 1 mm is about 7.9 pixels. A 35 by 45 mm photo becomes roughly 276 by 354 pixels, which is enough detail for most passport and document printing.
Can I set an exact file size in KB?
Yes. The target size field defaults to your uploaded file size, and you can lower it. The tool tunes the JPEG quality, and shrinks the dimensions only if needed, to match the KB you set.
How do I stop the image from stretching?
Turn on Lock Aspect Ratio. When it is on, changing the width updates the height automatically, so the picture keeps its original shape and nothing looks squashed.
Is my image safe when I resize it?
Yes. The whole process runs inside your browser, so the image never leaves your device and is never uploaded to a server. Nothing is stored or shared.