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3d tools

4 reviewed tools: 4 free or open source.

Order: free and open source first, then hosted products with a real free tier, then paid-led; catalog order inside each group, with quiet or archived repos last. Not a score, and no tool pays for its place.

4 tools

  • Babylon.jsApache-2.0 3D engine for the web, now on v9

    Free / OSS · Apache-2.0 · 26.2k GitHub stars

    VerdictThe open 3D game and rendering engine for the web. Apache-2.0, on v9.

    CatchHeavier than a 2D starter. docs.babylonjs.com (with an s) has returned 500; working docs host is doc.babylonjs.com. Editor pricing was not verified here, so it is omitted.

  • RapierApache-2.0 Rust/WASM physics: 2D+3D, joints, SIMD

    Free / OSS · Apache-2.0 · 5.9k GitHub stars

    VerdictApache-2.0 2D+3D physics. Not Matter.js 2D.

    CatchRust/WASM 2D+3D with joints/SIMD/optional determinism — Matter.js is MIT 2D only. Planck covers the same 2D JS slot as Matter. Distinct from Matter.js.

  • GodotMIT engine with HTML5/Wasm+WebGL2; Compatibility mode for embeds

    Free / OSS · OSS/MIT · 119k GitHub stars

    VerdictMIT Godot. Web works in Compatibility/WebGL2; plan COOP/COEP only if you need threads.

    CatchCompatibility/WebGL2 only for web; threaded export needs COOP/COEP — single-thread default since 4.3 for embeds. Not Phaser JS canvas. Distinct from Phaser.

  • ThrelteMIT Three.js framework for Svelte

    Free / OSS · OSS/MIT · 3.4k GitHub stars

    VerdictMIT Svelte+Three. Free forever.

    CatchSvelte-bound - not React Three Fiber. Still Three.js under the hood. Distinct from Theatre.js motion editor and Babylon engines.

FAQ

What is the top free pick among 3d tools?
Babylon.js leads the Stack Gems list for 3d tools. Verdict: The open 3D game and rendering engine for the web. Apache-2.0, on v9.
How many 3d tools does Stack Gems review?
4: 4 free or open source. Each review has a verdict and an honest Catch; no tool pays for its spot.
Which 3d tools can I self-host for free?
Babylon.js, Rapier, Godot and Threlte.
Which 3d tools have the most GitHub stars?
Godot (119k), Babylon.js (26.2k), Rapier (5.9k), per GitHub on 2026-10-21. Stars measure attention, not fit; read the Catch.
What is the catch with Babylon.js?
Heavier than a 2D starter.

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