Nerulio Sprite Lab review
A free browser tool for reviewing, editing, and exporting existing sprite animations.
Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
Nerulio Sprite Lab is a browser-based workspace for preparing sprite sheets and existing animations for games. It suits solo developers and small teams who need to organize frames, inspect motion, set animation metadata, and export assets for a game engine. It is focused on animation, slicing, packing, and export; painting is handled in a separate Pixel workspace.
The animation tools cover tags, direction, repeat count, per-frame durations, frame reordering, duplication, and flipping. Playback includes loop, ping-pong, repeat, onion skin, and a floating preview. Users can also adjust per-frame pivots, hit and hurt boxes, custom boxes, and collision polygons. This makes the product more suitable for refining imported work and preparing it for a project than for creating artwork from scratch.
Imports include sprite sheets, numbered frame files, GIF and APNG, Aseprite files and JSON, TexturePacker JSON, and Starling XML. Pack & Export targets include Godot, Unity, Phaser, PixiJS, Spine/libGDX, Starling/Sparrow, LÖVE, Defold, and GameMaker, alongside image and atlas formats. The vendor describes processing and exporting in the browser without uploading files, and says the tool is free to use without an account. Choose Sprite Lab if you want a web-based review and export workflow for existing animations; look elsewhere if you need painting in the same workspace or a documented maximum animation size.
Nerulio Sprite Lab pros and cons
- Where it wins
- Imports common sprite sheets, animation files, and atlas formats
- Provides playback, onion skinning, frame timing, tags, and frame edits
- Exports engine-oriented assets while processing files locally in the browser
- Where it doesn't
- Focused on animation preparation and export, not painting
- Runs only on the web
- Maximum animation frame count is not documented
Nerulio Sprite Lab fact sheet, pricing and score →
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