Hong Kong Passport
Government-spec dimensions, head positioning, and file constraints.
- Pixel size
- 472 × 591 px
- Print size
- 40 × 50 mm · 300 DPI
- Background
- white#FFFFFF
- Face height
- 64–72% · target 68%
- Eye line
- 54%–66% from bottom
- File size limit
- —
Note: HKSAR passport photo; 40x50 mm; head 32-36 mm; white background
03 — Compliance engine
Live validation
against the actual rulebook.
Every crop is measured against the published tolerance ranges for the selected document. Pass or warn, in real time — no "submit and hope."
VALIDATOR · HK_PASSPORTALL CHECKS PASS
Dimensions
472 × 591 px
exact
472×591
Face height
64% – 72%
target 68%
68%
Eye line
54% – 66%
target 60%
60%
Background
white
ΔE < 3
#FFFFFF
File size
—
JPEG q=92
182 KB
Sharpness
no motion blur
Laplacian var
1,284
The same checks the authority will run — before you submit.
- Face height & eye line measured from the pupil midpoint with sub-pixel accuracy, clamped to the tolerance range your authority publishes.
- Background colour checked across a sampled grid — catches gradients and fringe from poor segmentation (ΔE < 3 against spec).
- File-size ceiling enforced per-spec — recompressed silently for sub-60 KB e-visa portals, lossless for print.
- Sharpness & expression guards warn on blur, closed eyes, or non-neutral expressions before you export.
Process this in your browser
No install. Photos stay on your device. $2.99 per photo, watermark-free.
Open in browserShoot once. Ship anywhere around the world.
SpecSnap is free to download. Try it on the next passport renewal, visa application, or driving-licence form sitting in your inbox.