Photo Converter — Resize & Convert Image Dimensions
Convert photograph dimensions between physical units (mm, inches) and digital pixels with customizable DPI and export options for passport portals.
How It Works
1. Upload your photo
Select any JPEG, PNG, or WebP photograph from your computer or smartphone.
2. Choose dimensions & unit
Specify exact width and height in millimeters (mm), inches (in), or digital pixels (px).
3. Select DPI resolution
When converting physical units (mm/in), choose 300 DPI for standard printing or 96 DPI for screen/digital portals.
4. Export format & options
Pick JPEG, PNG, or WebP, set format quality, and optionally set a maximum file-size limit (KB).
5. Download your result
Download your converted photo instantly with exact resolved pixel dimensions.
Millimeters vs Inches vs Pixels (Understanding DPI)
Physical Units (mm & inches) describe physical print size on paper (such as a 35 × 45 mm passport photo or a 2 × 2 inch visa photo).
Digital Pixels (px) describe the actual grid resolution of the digital image file uploaded to government portals (e.g. 413 × 531 px or 600 × 600 px).
DPI (Dots Per Inch) establishes the bridge between physical measurements and digital pixels. For print output, 300 DPI is standard photographic print quality. When digital screen submission is required, 96 DPI is commonly referenced for digital portals.
100% Local & Private Processing
All image conversion and resizing operations take place directly inside your web browser. Your photographs are never transmitted to external servers or cloud services.
Frequently Asked Questions
- What DPI should I choose for passport photos?
- Use 300 DPI for physical printing. If uploading directly to an online portal that requests digital pixels, choose 300 DPI or select pixels (px) directly.
- Why are exact output dimensions recommended?
- Official document and passport portals strictly validate digital pixel width and height. By default, exact resizing is enforced to guarantee compliance.
- Does changing DPI affect image size when unit is set to pixels (px)?
- No. When unit is set to pixels (px), DPI is irrelevant and does not alter the digital canvas pixel width or height.
- How does maximum file size compression work?
- When enabled, the converter intelligently optimizes quality parameters to guarantee your output file remains under your chosen KB size limit without changing requested pixel dimensions.
- Is my original photograph modified or uploaded anywhere?
- No. Your original photo remains safe in browser memory and is never overwritten or transmitted over the internet.