EAGLERCRAFT
WASM versus JavaScript
Both kinds of build are published for 1.8.8 and 1.12.2. The play FAQ’s performance sentence is “about 50 percent faster” for WASM-GC, not a promise of a specific frame rate on your Chromebook.
Last reviewed: . By the Eaglercraft Guide editorial team.
The FAQ's performance estimate is attributed to the project, not measured here. JSPI/WASM-GC availability varies by browser; use the compatible same-version JS alternative if the launcher cannot offer WASM.
When to pick which
| Build | JS | WASM-GC |
|---|---|---|
| 1.8.8 | Widely deployed fallback | Faster path when the browser qualifies |
| 1.12.2 | Called slow while the port is in development | The path the download page recommends |
| 26.2 | Zeus HTML is a single file; a separate WASM-GC claim is not on the download blurb | Heart SMP’s wiki tells players to choose 26.2 WASM |
| 1.5.2 | Legacy HTML | No official WASM-GC note |
WebGL2 is required for dynamic lighting and the built-in PBR path. WebGL1 is the floor the FAQ mentions for the JavaScript runtime. A school Chromebook that loses the WebGL context was a target of the u53 update on 7 July 2025, which is a 1.8 client update, not a 26.x update.
Questions
Will WASM hit 60 FPS?
Not guaranteed. The only quantified claim on the play FAQ is about 50 percent faster than the JavaScript build, with VSync on.
What if WASM will not start?
Use the JavaScript zip for that same version from the official downloads page, then read the not-loading guide.
Related: 1.12.2 · Lag and FPS · Chromebook
Other versions, tools and troubleshooting
These links explain related topics, not a guarantee of compatibility with every build or server.
- Eaglercraft servers
- Eaglercraft mods
- Resource packs and texture packs
- Shaders on Eaglercraft
- Download Eaglercraft from the official page
- Lag and FPS
- Not loading
- Can’t connect
- Eaglercraft 1.8.8
- Eaglercraft 1.12.2
- Eaglercraft 26.2
- What 26.3 means right now
- Eaglercraft 1.21: open 26.2 or 26.3 instead
- Eaglercraft 1.20 and 1.20.4
- Eaglercraft 1.5.2
Sources
- Project FAQ: 1.8 world transfer, shared-world invitations, controls, browser requirements and PBR. Reviewed 2026-10-27.
- Project download catalog: four version families and six ZIP links; rechecked 27 Oct 2026. Reviewed 2026-10-27.
- 1.8.8 WASM ZIP: bytes and SHA-256 recomputed 27 Oct 2026; not executed. Reviewed 2026-10-27.
- 1.12.2 WASM ZIP: bytes and SHA-256 recomputed 27 Oct 2026; not executed. Reviewed 2026-10-27.
- HeartSMP operator wiki: 26.2 WASM client, WSS endpoint and 26.3 backend; not a join test. Reviewed 2026-10-27.
- Project u53, 7 July 2025: Intel Chromebook and WebGL fixes for the 1.8 line. Reviewed 2026-10-27.
- MDN WebGL: browser and GPU APIs, not an FPS guarantee. Reviewed 2026-10-27.
Original illustrations on this page are drawn for eaglercraft.pro. They are not official screenshots.