1-inch ID Photo preset
295×413 px (25×35mm @300DPI) · JPG · ≤100KB
A standard 1-inch ID photo is 25×35mm — 295×413 px at 300 DPI. Online registration systems (exams, student records, social insurance) usually require JPG under a size cap; this preset outputs 295×413 at quality 92 targeting 100KB, adjustable to common 30KB/50KB requirements.
No images yet — drag, click, or just ⌘V paste
Output settings
Best per input: photos → WebP, screenshots/graphics → quantized PNGQuality78Expected output ≈15–20% of the original (content dependent)
Longest edgeAspect ratio kept
Platform presets
Advanced
Keep ICC · wide gamutKeep profiles like Display P3 when detected
PNG quantize (TinyPNG style)imagequant palette compression; falls back to lossless if unavailable
Quantize tier
Preset parameters
- Physical size
- 25 × 35 mm（一寸）
- Pixels
- 295 × 413 px @ 300 DPI
- Format
- JPG
- Target size
- ≤ 100 KB（可按系统要求下调）
How to use
- Drag your photos into the dashed box above (batch supported — a whole set at once).
- The "1-inch ID Photo" preset (size and size budget) is pre-applied on this page; tweak in the panel if your platform differs.
- Download individually or as a ZIP after local processing, then upload through the platform as usual.
Platform notes
- Background color (white/blue/red) comes from the photo itself; this tool does not recolor backgrounds.
- Center the face, show both ears, no hat — review rules are nearly identical across systems.
- If the system requires ≤30KB or ≤50KB, just lower the target — the engine still maximizes quality.