Convert text to downloadable audio using Web Speech API with voice selection and playback speed control.
This tool turns pasted text into a spoken audio file. You type or paste the passage, choose a voice from a menu, set a playback speed, and download the result - no microphone needed. Speech is generated in your browser via the Web Speech API, and the audio is captured into a file as it plays, so the text you type is never uploaded to the site. The thing users most often misunderstand is the voice list: it is populated from voices installed on their own operating system and browser, not from a library owned by the tool, so it looks different on every machine and the same voice is not available everywhere.
A concrete input and expected output from the current implementation.
Input
This sentence has exactly ten words in it, you see.
Expected output
A downloadable audio file of that sentence spoken in the selected voice - roughly 3 to 4 seconds at the default speed (about 160 words per minute), about 2 seconds at 2x speed.
Duration follows the spoken length: ten words at roughly 160 words per minute run about 3.75 seconds, and doubling the rate halves that. The exact time varies slightly with the chosen voice, so treat the figure as approximate.
The voice menu is built from what the browser's speech engine finds on the device: macOS exposes its system voices, Windows exposes Microsoft voices, and Chrome adds its own Google voices, some of which need an internet connection. The tool ships no voices of its own, so the same page offers a different menu on a Mac, a PC, or a phone. Preview before converting, because quality varies widely between entries.
The browser speaks the text aloud with the chosen voice and rate while recording that audio; the download appears when playback finishes. A ten-minute passage therefore takes about ten minutes to convert at normal speed, less at higher speeds, since doubling the rate halves the spoken duration. Everything happens locally in the tab, and closing it mid-conversion discards the work.
Often not. Because synthesis and capture happen in the browser, the file format follows what the browser can record - typically WebM in Chrome and Firefox, M4A in Safari. Open the download to see what it actually is; if MP3 is required, convert the file afterward with any audio converter.
The tool itself runs entirely in the browser, and voices stored on your machine work with no connection. In Chrome, voices labeled 'Google' are network voices: they need an internet connection, and the browser sends the text to Google's speech service to produce them. Offline, Chrome uses its local voices instead.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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