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

PROJECT WORKSPACE

Save reusable setup

Local only

Save profile, extraction, normalization, prompt and delivery settings in this browser. Source images and API keys are never stored in project history.

Project name Saved projects

Import project JSON

Custom profile JSON Recent runs

Run history stays local unless you export it.

CHATGPT IMAGE SOURCE

Prepare art with ChatGPT Image

No API key needed

SpriteForge is ChatGPT-first: write the asset request here, copy the production prompt into your ChatGPT conversation, generate the image with ChatGPT Image, download the PNG, then import it below. Your ChatGPT plan stays separate from this website and no OpenAI API credential is required for this workflow.

Asset request

1) Copy prompt → 2) generate in ChatGPT Image → 3) download PNG → 4) choose or drop the image below.

Optional API automation

Only use this if you later want SpriteForge itself to call an image API automatically. It is not required for the ChatGPT-first workflow.

Generation size

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

Profile 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

Repair runs deterministic fixes first and prepares a regeneration prompt only for failures that cannot be fixed safely.

3. Export

Pack name

Includes PNGs, 4× preview, manifest, validation report, Renyro job, freeze receipt and repository delivery request.

4. Orchestrate & deliver

Create a deterministic Renyro handoff, freeze only a fully passing pack, then prepare a CloudHarness/GitHub delivery contract.

Target repository Target base path

Validate a pack before freezing or delivery. Checking Renyro/GitHub delivery configuration…

SOURCE

Sprite sheet

OUTPUT

Sprites

0 sprites

✦

Nothing forged yet Load a source image and extract sprites.