UK passport photo specifications
| Parameter | Requirement |
|---|---|
| Print size | 35×45 mm |
| Background | Plain light grey or white |
| Expression | Neutral, mouth closed |
| Glasses | Not allowed |
| Digital format | JPEG |
| Recency | Within last month (for new passports) |
UK-specific rules
- UK requires photos taken within the last month for new passport applications — stricter than most countries.
- Background can be light grey or white — unlike the US which requires pure white.
- No smiling — neutral expression only.
- Children under 6 don't need to have their eyes open (but it's preferred).
How to prepare
Use PhotoResizer.in to resize to 35×45 mm equivalent pixels (approximately 600×750 px for digital uploads). Use the Background Changer for a clean white/grey background.
Technical Verification & Standards Compliance for Digital Submissions
When uploading photographs, signatures, or official records to government portals, visa processing systems, or recruitment boards, strict automated validation scripts evaluate both visual clarity and physical file parameters. Minor errors—such as non-standard aspect ratios, improper pixel dimensions, high compression artifacts, or unstripped EXIF headers—frequently trigger instant system rejections.
Image Dimension & Aspect Ratio Math
Official forms specify exact physical measurements (e.g., 3.5cm × 4.5cm) or pixel boundaries (e.g., 350×450px). Converting physical units into digital resolution requires applying exact DPI scales: Pixels = (Millimeters / 25.4) × DPI.
Local WebBrowser Compression Engine
PhotoResizer.in uses client-side HTML5 Canvas and WebAssembly algorithms to compress image streams down to specific KB limits (10KB, 20KB, 50KB, 100KB, 200KB) entirely inside your web browser. Visual data never leaves your device.