Paste an identifier-map JSON and a stack trace. Click Demangle. The substitution runs entirely in your browser — no network call, no server upload, no third-party storage.
Privacy check. Everything you paste below stays in this page's memory. There is no fetch, no XHR, and no analytics request for the textarea contents. View source if you want to confirm. The same algorithm runs in the offline diagnostic package; this demo just exposes it through a textarea UI.
Identifier map (paste JSON or block text)
0 entries
Stack trace (paste the crash text)
0 lines
Ready
Need this in release review or error reporting? See the diagnostic workflow doc for the command-line package and the six error-reporter integrations (Sentry, Bugsnag, Rollbar, Datadog, Honeybadger, Raygun).