Resize Image Online - Millimeter Units

Resize your images using millimeter units with our free online image resizer. Upload, resize, and download instantly. Support for all common image formats with complete privacy protection.

Custom Dimensions - Millimeter Units

Create your own custom dimensions using millimeter units. Perfect for print applications and precise measurements.

Create Custom Dimension

Supported units:

  • • Pixels (px): Direct pixel values (1:1 ratio)
  • • Inches (in): Converted to pixels at 300 DPI
  • • Centimeters (cm): Converted to pixels at 118.11 DPI
  • • Millimeters (mm): Converted to pixels at 11.811 DPI

Features

Millimeter unit support for precise measurements
Maintain aspect ratio with padding
High-quality image processing
Support for all major image formats
Client-side processing for privacy
Instant download after processing

How to Use

1Enter your desired dimensions in millimeters using the form above
2Upload your image file (JPEG, PNG, GIF, WebP, or SVG)
3Preview the resized image and adjust positioning if needed
4Download your resized image in the exact dimensions specified

Other Unit-Based Resizers

Need different units? Try our other unit-specific image resizers for precise measurements.

cm
Centimeter Units
Perfect for international print standards
in
Inch Units
Ideal for US print standards

About Millimeter-Based Image Resizing

Our millimeter-based image resizer provides the highest precision for technical applications. Millimeter units are essential for engineering drawings, architectural plans, and any project requiring exact measurements down to the smallest detail.

Key Applications:

  • • Engineering and technical drawings
  • • Architectural blueprints and plans
  • • Precision manufacturing specifications
  • • Scientific documentation and research
  • • Medical imaging and healthcare

Advantages:

  • • Highest precision measurement unit
  • • International standard for technical work
  • • Compatible with CAD software
  • • Essential for quality control
  • • Required for regulatory compliance

Unit Conversion Reference

Millimeter to Centimeter
1 cm = 10 mm
Millimeter to Inch
1 inch = 25.4 mm
Common Sizes
A4: 210 × 297 mm