WebAssembly Unavailable? Troubleshoot by Platform and Environment

What You're Seeing

After uploading a model, Any3D displays: "Your browser does not support WebAssembly." Format conversion, Draco decompression, KTX2 texture compression, and other operations are blocked.

WebAssembly (WASM) is the foundation for running high-performance code in the browser. Any3D's Draco, MeshOpt, IFC/STEP parsing, and KTX2 encoding modules all depend on it. Without WASM, the core workflow is completely halted.

Common Causes

Cause	Typical Scenario
Outdated browser	Long-unupdated Chrome on corporate intranet, IE compatibility mode
Security policy disables WASM	Corporate GPO/MDM, parental controls, Chinese browsers in "compatibility kernel"
Extension or script blocker	Ad blockers or privacy plugins incorrectly blocking .wasm resources
Network middlebox interference	Corporate VPN, transparent proxy, intranet gateway rewriting or intercepting WASM files
Non-standard WebView	In-app browsers (e.g., WeChat, DingTalk), old embedded WebViews in apps
Device management configuration	School/corporate managed devices, Screen Time-like restrictions

Troubleshoot by Platform

Windows (Desktop)

1. Use the latest stable Chrome or Edge (version 90+ recommended). Avoid IE mode and "Compatibility View."
2. Open chrome://settings/system and ensure hardware acceleration is enabled. (This is tied to the GPU stack and can affect WASM loading in some environments.)
3. Group Policy (Enterprise): If IT has configured "Disable JavaScript" or restricted web features, WASM will also be disabled. Contact your admin to confirm if wasm-unsafe-eval or equivalent policies are allowed.
4. Windows Family Safety / Parental Controls: If the account is a "child account" with browser restrictions, switch to an admin account or adjust "Web browsing restrictions" and retry.

macOS (Desktop)

1. Use Safari 15+ or the latest Chrome/Firefox.
2. Screen Time: Go to Content & Privacy Restrictions → Web Content. If set to "Limit Adult Websites" or "Allowed Websites Only," it may indirectly restrict script execution.
3. MDM-managed Mac (company-issued device): Check configuration profiles for browser extension or web capability restrictions.

Linux (Desktop)

1. Install Chrome or Firefox from the official distribution repository or the browser's official site. Avoid outdated Snap/Flatpak versions.
2. If a corporate Linux workstation uses a forced HTTP proxy, confirm the proxy is not intercepting .wasm files or altering the Content-Type: application/wasm header.

iOS / iPadOS (Mobile)

1. Open Any3D in Safari or Chrome (iOS uses WebKit). Avoid using it inside an app's WebView.
2. Screen Time → Content & Privacy Restrictions: Turn off "Limit Web Content" or add Any3D to the allowed list.
3. Corporate MDM devices may disable some JavaScript capabilities. Contact IT.

Android (Mobile)

1. Use the latest Chrome. For Chinese browsers, switch to "Fast/Modern kernel" mode — do not use compatibility mode.
2. Digital Wellbeing / Parental Controls (e.g., Family Link): Check if the browser or unknown sites are restricted.
3. If opened in WeChat or DingTalk, tap the upper-right corner and select "Open in Browser."

Network, VPN, and Corporate Intranet

Scenario	Recommendation
Corporate VPN	Test by disconnecting the VPN. Some VPNs MITM or cache static resources, causing WASM validation to fail.
Intranet proxy / transparent gateway	Have IT confirm that *.wasm is not blocked. Add Any3D's domain to the allowlist if necessary.
Overseas nodes / routing rules	Ensure Any3D's static resources are accessed via a direct or stable route, avoiding CDN nodes returning wrong MIME types.
Zero Trust Agent (ZTA)	Some agents inject CSP headers — require wasm-unsafe-eval to be allowed.

For personal users: Switch to a mobile hotspot or home network to quickly determine if the issue is network-related.

Parental Controls and Device Management

• Microsoft Family Safety / Google Family Link / Apple Screen Time: Check if "Website filtering" or "Allow only approved apps" is blocking full web capabilities.
• School/public library computers: Often have Deep Freeze or minimal browser configurations. Use a personal device instead.
• Corporate Intune / Jamf managed devices: The browser may be locked to an old version or have script capabilities disabled beyond extensions. Ask IT for an exception or use an unmanaged browser profile.

Step-by-Step Fix (General)

1. Open a private/incognito window and retry (eliminates extensions).
2. Update your browser to the latest stable version and restart.
3. Cross-check with a different browser: Chrome ↔ Edge ↔ Firefox ↔ Safari.
4. Turn off IE Compatibility / Dual-core compatibility mode.
5. Disable extensions one by one (start with ad blockers, privacy tools, and script managers).

Quick Self-Test

In the developer console, run:

typeof WebAssembly !== "undefined";

If it returns true, the WASM API is available. If it's still false, the problem lies with the browser or system policy, not with Any3D.

Still Not Working?

1. Record: OS, browser version, whether you're on a VPN/intranet, and whether the device is managed.
2. Submit feedback via the Any3D page's feedback option, including the above information.

Summary

Missing WebAssembly is most often caused by outdated browsers, extension interference, VPN/intranet interception, or corporate/parental policy restrictions. Going through the platform-specific checks should restore functionality in most environments. Any3D cannot fall back when WASM is unavailable — fixing the browser and access environment is the only viable solution.