LOCAL-FIRST PIXEL ASSET FACTORY

SpriteForge

Drop in a generated sprite sheet. Extract, normalize, validate, and export a game-ready asset pack without uploading the source image anywhere.

Browser-only MVP

or drag & drop PNG / JPEG / WebP

No image loaded

TINY ARENA

Floor pack validator

48×48 seamless mix

Select a completed tiny_arena_floors/<theme_id>/ folder. SpriteForge checks exact filenames and dimensions, opacity/binary alpha, pure black/white, shared 16-color palette, horizontal edge tiling, and cross-variant floor seams.

No floor pack loaded

4×4 RANDOM-MIX SEAM PREVIEW

1. Extract

Extraction mode

Background tolerance 24 Minimum component area

2. Name & normalize

Creature IDs one per line

When the extracted count is 3 × the number of IDs, SpriteForge assigns south, east, north in row-major order.

Width Height

Per-ID size overrides id=WxH Alpha threshold 128

Palette min Palette max

Per-ID palette max id=max Outline color

3. Export

Pack name

Includes PNGs, 4× preview, manifest and validation report.

SOURCE

Sprite sheet

OUTPUT

Sprites

0 sprites

✦

Nothing forged yet Load a source image and extract sprites.