A scene partner that never gets tired and catches every flub. Load a script, pick your character, and run lines out loud -- it listens, flags mistakes, and rewinds to the trouble spots. Free, no signup, and we never receive your audio.
🔒 Where your data goesShow detailsHide
Line Runner runs in your browser. There is no account, we never receive your audio, and your scripts are never stored on a server. Here is exactly what happens to each kind of data:
Your scripts stay in this browser, saved on your device. They are parsed locally and sent nowhere, unless you choose one of the AI features below.
Your voice (mic mode) is turned into text by your browser’s built-in speech recognition. To do that, your browser may send the audio to its maker’s servers (for example, Google in Chrome). This site never receives or stores your audio. Want no cloud at all? Use tap mode.
AI cleanup (the optional “Clean up with AI” button for messy scripts) sends your script text, never your voice, to Anthropic to restructure it. It only runs when you tap it.
AI voices (optional, more natural partner voices) send your script text, never your voice, to OpenAI to generate the audio. Only when you switch AI voices on.
None of this is sold, and under their API terms the AI providers do not use this text to train their models. Browser voices and tap mode use no outside services at all.