Privacy note：Advanced smart enhancements show clear guidance before use. Please make sure you have permission to edit the photo.
Make Your ID Photo
40+ countries · 400+ China formats · Exact pixel output · crop-only mode for strict documents · background tools for eligible formats
What Is a 4×4cm Photo?
A 4×4cm photo is a square portrait measuring 40×40mm.
- Physical size: 4×4cm (40×40mm, about 1.57×1.57 inches), square
- Pixels at 300 DPI: 472×472px
- Pixels at 350 DPI: 551×551px — match the resolution your issuer states
- 1:1 aspect ratio
Common Uses
Honest answer from our verified database of 40+ country specs and 400+ China domestic specs: we could not verify a major official document that requires exactly 4×4cm. Watch out for these near-matches:
- Japan visa: 45×45mm square — 5mm larger per side, not interchangeable
- US passport/visa: 2×2 inches = 51×51mm — much larger
- China Hong Kong City University enrollment photo: 38×40mm (450×475px) per our China spec database — close but not identical
- If your issuer wrote 4×4cm, follow it exactly — and confirm they didn't mean a near size
How to Make One Online
Choose the spec
Open the /id-photo tool and enter a custom 4×4cm (472×472px) size.
Upload a photo
Take a selfie against a plain wall or upload an existing shot. It is uploaded only when you choose AI processing; use the non-AI workflow for authorities that prohibit editing.
Preview free
AI centers the face, crops to the exact square ratio, and replaces the background. The preview costs nothing.
Download or print
Pay $1 for the exact-pixel HD file, or $2 for a 300-DPI print sheet with multiple copies on one page.
Background & Compliance Notes
- Background: plain white or light-colored is the safe default — our AI replaces it automatically
- Because 4×4cm is uncommon, confirm the exact written requirement with the issuer before ordering
- The issuer's own rules always prevail over any general guide
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