Sheet Packer (formerly Atlasmith) review
An affordable browser atlas packer with offline processing and multi-page Pro exports.
Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
Sheet Packer is a browser-based texture atlas packer for indie game developers, particularly solo and small teams that need to organize PNG sprites for game projects. Its packing workflow uses MaxRects and includes alpha trimming, 90-degree rotation, padding and extrude/bleed controls, and power-of-two sizing. The vendor says processing happens offline in the browser, so sprites stay on the user's machine. It is a focused utility rather than a broader sprite-editing environment.
The free demo handles up to 32 sprites and exports generic JSON and PNG. Pro is a one-time $14.99 purchase; its published features add automatic multi-page atlas output, ZIP downloads, and JSON exporters for Phaser 3, PixiJS, Godot 4, and Unity, alongside generic JSON. Free lifetime updates are included. That makes the paid tier relevant when an engine-specific exporter or multiple atlas pages matter, while the demo offers a way to try the basic packing and export flow before buying.
The main trade-off is scope: Sheet Packer is built around packing and exporting atlases, and its maximum atlas size is 4096 pixels. Teams that need a broader sprite-production workflow or larger atlases should compare alternatives. For smaller projects that need trimming, rotation, and engine-oriented metadata without leaving a browser workflow, the free demo may suffice; choose Pro when ZIP and multi-page output or one of its named engine exporters are needed.
Sheet Packer (formerly Atlasmith) pros and cons
- Where it wins
- Offline browser processing keeps sprites on your machine, according to the vendor.
- Pro adds multi-page atlases and exporters for Phaser 3, PixiJS, Godot 4, and Unity.
- Pro costs $14.99 one-time and includes free lifetime updates.
- Where it doesn't
- The free demo is limited to 32 sprites.
- Maximum atlas size is 4096 pixels.
- The tool focuses on packing and export rather than a broader sprite workflow.
Sheet Packer (formerly Atlasmith) fact sheet, pricing and score →
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