sgb border viewer — free browser tool | fatcousin

extract and view super game boy custom borders · 4bpp snes tile format · 256×224 · sgb chr_trn pct_trn scan · export png · runs locally

drop file

drop a game boy rom

.gb .gbc — SGB-compatible games have a border embedded in ROM

Select file

status

drop a game boy rom with sgb support (.gb)

sgb reference

SGB border format

display256×224 (SNES native)

tiles4bpp SNES format, 32 bytes each

tilemap32×28 entries, 2 bytes each

palettes4 palettes × 16 colors (15-bit BGR)

CHR_TRNSGB cmd 0x13 — upload tile data

PCT_TRNSGB cmd 0x14 — upload tilemap + palette

notable SGB games

Pokémon Red/Bluecolored sprites, custom border

Donkey Kong Landfull SGB border

Kirby's Dream Land 2animated SGB border

Zelda: Link's Awakening DXSGB + CGB