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Millimeter (MM) Print & Biometric Resizer · 300 DPI Calibrated

Image Resizer in Millimeters (MM) Online

Enter any width and height in millimeters (mm)—pre-loaded with the global 35 × 45 mm ICAO passport standard at 300 DPI—and resize + compress in one browser pass.

Preset: 35 × 45 mm @ 300 DPI • ≤ 100 KB
Drop any photo to resize in MM or browse files

Supports JPG, PNG, HEIC, WEBP, PDF, SVG, TIFF, AVIF, GIF, BMP

No file size limit Add unlimited photos 100% in-browser

No files selected yet. Drag & drop photos, documents or click browse above.

Common Millimeter Photo Sizes & 300 DPI Pixel Equivalents

Reference chart for global visas, IDs, and print stationery:

Standard / CountryMillimeters (W × H)Pixels at 300 DPIPixels at 200 DPI
ICAO Standard Passport (EU/IN/UK/AU) 35 × 45 mm 413 × 531 px 276 × 354 px
China COVA Visa & Passport 33 × 48 mm 390 × 567 px 260 × 378 px
Malaysia Passport & eVisa 35 × 50 mm 413 × 591 px 276 × 394 px
Canada IRCC Visa & PR Photo 50 × 70 mm 591 × 827 px (420×540 digital) 394 × 551 px

Precision Millimeter Scaling Without Manual Math

Typing millimeter fractions into basic pixel editors requires dividing by 25.4, multiplying by 300, and remembering to update the JFIF DPI tag separately. A single rounding mistake can trigger automated consular portal rejections.

Above, PixelKit opens with "mm" already selected in Stage 2 (`35 × 45 mm` at `300 DPI` and `≤ 100 KB`). Change `35` and `45` to any millimeter specification—like `33 × 48`, `35 × 50`, `25 × 35`, or `210 × 297` (A4)—and download your exact print-calibrated image.

Sub-Millimeter Accuracy

Supports decimal millimeter entries (e.g., 50.8 × 50.8 mm) with IEEE-accurate rounding.

Embedded Print DPI Header

Writes matching 300 DPI (or 200/600 DPI) metadata so photo kiosks print exact millimeter borders.

Simultaneous KB Control

Hits 20 KB, 50 KB, 100 KB, or 200 KB limits in the same Web Worker pass.

Related Presets, Calculators & Companion Studios

Jump directly to a pre-configured studio with exact settings locked in:

MM to Pixels Converter →
Interactive MM Calculator

Instant mm-to-px calculator at 72–600 DPI.
Pixels to MM Converter →
Reverse PX → MM

Check physical millimeter print size of any image.
Resize 35×45 mm Photo →
413×531 px Preset

Dedicated 35×45 mm biometric passport resizer.
Image Resizer in CM →
3.5×4.5 cm @ 300 DPI

Resize photos in centimeters online.
Image Resizer in Inches →
2×2" & 4×6" @ 300 DPI

Resize photos in inches for US visas & prints.
Resize Image in Pixels →
Exact W × H px

Direct pixel width and height resizer.

Frequently asked questions

How many pixels is 35 × 45 mm at 300 DPI?
35 mm ÷ 25.4 × 300 = 413.39 px (413 px), and 45 mm ÷ 25.4 × 300 = 531.50 px (531 px). So 35 × 45 mm at 300 DPI is 413 × 531 pixels.
What is the difference between resizing in mm vs cm?
1 cm equals 10 mm (3.5 × 4.5 cm = 35 × 45 mm). Millimeter mode lets you enter integer specs like 33 × 48 mm (China) or 50 × 70 mm (Canada) directly without decimal conversions.
Can I switch from 300 DPI to 200 DPI while resizing in mm?
Yes! Use the DPI selector right next to the mm inputs in Stage 2 (or Stage 5) to recalculate pixels at 72, 150, 200, 300, or 600 DPI.
Are my ID photos uploaded to the cloud?
Never. All millimeter-to-pixel resampling happens locally inside your browser.