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WebAssembly Inspector
See the sections, imports, exports with signatures, memory and toolchain of any .wasm file.
Free, no uploads, no sign-up. Runs 100% in your browser.
How WebAssembly Inspector works
The binary format is read section by section: types, imports, functions, tables, memory, exports, and custom sections like name and producers. The module is never run, and the browser also says whether it can compile it.
Input: WASM. Output: JSON.
How to use WebAssembly Inspector
- Drop a .wasm file.
- Read exports, imports and sections.
- Download the report as JSON.
Tips
- Everything is computed locally. Safe for tokens, keys and private data.
- Use Ctrl/⌘ + K to jump between developer tools quickly.
WebAssembly Inspector FAQ
- Are my files uploaded?
- No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
- Is it free? Are there limits or watermarks?
- Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
- Does it work offline?
- Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.
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