Troubleshooting
Local audio tool is stuck loading
The FFmpeg WebAssembly asset may be blocked, the browser may be compiling slowly, or an extension/security setting may prevent workers.
Reviewed against current browser behavior and AudioFetcher test fixtures on July 28, 2026.
Check these first
- 1
Check whether the local engine asset request completed.
- 2
Disable aggressive script blockers for the page.
- 3
Try a current browser with WebAssembly enabled.
- 4
Test on a desktop connection and device.
Reliable fixes
- Reload once after clearing a failed cache entry.
- Allow same-origin worker and WASM assets.
- Use the calculator or metadata-free tools to distinguish engine load from file problems.
Change one variable at a time and test with a short known-good file. That separates a damaged source from a browser, codec, or memory limitation.
Questions about Local audio tool is stuck loading
What is the short answer to "Local audio tool is stuck loading"?
The FFmpeg WebAssembly asset may be blocked, the browser may be compiling slowly, or an extension/security setting may prevent workers.
Does the linked AudioFetcher tool upload my media?
The local tools linked from this article process selected media in the browser. Read each tool's limits before using a large or uncommon file.
What is the most important practical point?
Reload once after clearing a failed cache entry.