Pixel-first animation kit generator

Make a tiny friend.
Keep every frame.

Meet Nibi, our round little moon-moth kitten. Start with this original mascot or describe a completely different cute creature. Hatch locks its identity, builds 81 transparent pixel frames, remembers past hatches locally and proves each pet inside the Beacon Rescue adventure.

Hatch a pet Choose hosted or local

7engine paths

81live frames

0video jobs

NIBI / IDLEFRAME 01 / 06

Nibi, a mint pixel-art moon-moth kitten with lavender antennae

WAVE / 03

Nibi in a cheerful raised-paws pixel pose

Nibi's cream and mint pixel hatching egg

24-frame hatch

81ready-to-play
pixel frames

ONE IDENTITY NINE STATES TWENTY-FOUR FRAME HATCH TRANSPARENT PNG PORTABLE RUNTIME

The working forge

One idea.
A complete living pet.

The hosted page keeps pasted fal, OpenAI, xAI, OpenRouter or Google keys in memory only. The standalone Python workflow can instead talk directly to ComfyUI or InvokeAI on your own machine. Every path uses the same prompt hardening and deterministic atlas contract.

Generation engine

Use a cloud API, connect this browser directly to ComfyUI or InvokeAI, or use a local engine configured on a self-hosted Hatch server.

fal API key

Held only in page memory. Paste a key here or configure FAL_KEY on the server.

Describe the pet

Short ideas are expanded into one precise, model-ready creature.165/900

Prompt strengthened before send

Exactly one cohesive digital pet based on: A round mint moon-moth kitten named Nibi — tiny cream face, two lavender antennae, leaf-shaped wings, stubby paws, star-shaped tail tip, oversized friendly dark eyes. Keep a compact full-body game silhouette, expressive face, symmetrical anatomy, consistent markings and one unmistakable visual identity. Interpret any comma-separated animals as traits of one hybrid, never as multiple creatures. No duplicate anatomy or extra creature.

Look

Advanced execution FLUX.2 [klein] 9B + local alpha

Retry a missing pose pair onceAdds about $0.02 only when a two-pose segment fails.

Full no-retry run: 27 fal jobs, about $0.43 at listed FLUX pricing. Small two-pose requests are deliberate: they reliably return exact counts. Alpha, mirroring, packing and all 24 hatch frames run in this browser.

Ready

Ready to build 81 populated frames

Hatch runtime contract8 × 9 · 192 × 208 cells · 57 populated

01Idle6 frames

02Run right8 frames

03Run leftBuilt from run right

04Wave4 frames

05Jump5 frames

06Failed8 frames

07Waiting6 frames

08Working6 frames

09Review6 frames

10Hatch24 frames

Playable proof

Beacon Rescue

Hatch or import a pet to play.

Your sprite will run, jump and celebrate using its generated atlas.

Private · this browser only

Your hatch history

No saved pets yet.

Completed generations and valid imports will appear here automatically.

Built to survive messy prompts

Creative where it matters.
Exact where it counts.

Your chosen model invents the creature and poses. Hatch owns identity wording, alpha removal, subject extraction, state order, mirroring, pivots, cells, quality gates, local history and playback.

Identity lock / 01

One mascot,
many moods.

Nibi keeps the same mint body, cream face, lavender antennae, leaf wings and star-tail in every state.

Nibi's consistent idle pixel-art identity

Motion lock / 02

Alive without
losing the design.

Each tiny pose changes the gesture, not the character. Crisp clusters and a limited palette stay readable at app scale.

Clarify the creature

Comma-separated animals become one hybrid. Color lists become primary and accent palettes. The prompt forbids separate creatures and repeated anatomy.

Lock identity once

A square anchor defines anatomy, markings and camera. Every motion row and egg reuses the exact source image through the selected cloud or local engine.

Remove alpha locally

A uniform magenta field is converted to soft transparency in the browser. Border sampling, despill and coverage checks reject unusable backgrounds.

Pack, remember, play

Exact cells and a coded hatch produce deterministic exports. IndexedDB keeps past pets on-device, while the action wall and three-zone adventure verify that every atlas moves.

The Hatch contract

Prompts can bend.
Geometry cannot.

Nine reusable activity states and one onboarding hatch sequence ship as two transparent, app-agnostic atlases with a tiny dependency-free Canvas player.

Runtime: 57 populated frames
Hatch: 24 populated frames
Cell: 192 × 208 px
Runtime atlas: 1536 × 1872 px
Hatch atlas: 1536 × 624 px
Engine cost: Provider billing · local API $0

The engine stack

Bring a key.
Or bring a GPU.

Choose fal, OpenAI, xAI, OpenRouter or Google with a memory-only browser key or server secret. ComfyUI and InvokeAI users can instead run their own checkpoint and keep model execution on their machine.

StageEngineWhy it is hereListed cost

Hosted pathfal · FLUX.2 [klein] 9BThe browser-ready route uses one identity anchor and small reference edits, with queue URLs validated by the Worker proxy.≈ $0.43 / pet Cloud API pathsOpenAI · xAI · OpenRouter · GoogleChoose a provider in the page and use a tab-only key or a runtime server secret. Hatch normalizes each text and reference-edit response before local packing.Provider billing Local pathComfyUI native APIhatch.py fills an exported API workflow, uploads the identity anchor, submits /prompt, polls history and retrieves the final image directly.$0 API cost Local pathInvokeAI graph queuehatch.py uploads the anchor, enqueues an executable graph, polls its queue item and downloads the image output from the local instance.$0 API cost Transparent outputLocal chroma matteA strict #FF00FF field is removed in the browser with soft edges and despill. No paid cleanup model is required.$0 24-frame hatchDeterministic Canvas composerThe generated egg wobbles, bursts and reveals the locked pet over exactly 24 exportable frames—without a video bill.$0 Portable outputCanvas player + gameEvery completed pet is previewed as live actions, kept in private browser history and playable in a three-zone beacon rescue adventure.$0

Official references · 16 July 2026

Inspect the exact
APIs behind it.

Hatch source codeGitHub repository ↗FLUX.2 [klein] 9BText to image · $0.006/MP ↗FLUX.2 [klein] 9B EditReference editing · fast four-step ↗fal asynchronous inferenceLifecycle URLs + HTTP methods ↗fal proxy setupServer-side credential boundary ↗OpenAI Image APIGPT Image generation + editing ↗xAI Imagine APIGeneration + reference editing ↗OpenRouter Image APIUnified image models + references ↗Google Gemini Image APINano Banana generation + editing ↗ComfyUI Server APIWorkflow export · prompt · history ↗InvokeAI Workflow Execution APIGraph queue · image output ↗

Make a tiny friend.Keep every frame.

One idea.A complete living pet.