Audio Delay Calculator for Speakers
Calculate time alignment settings for secondary delay speaker lines at concert venues. Apply Haas effect precedence offsets to lock the sound image to the stage.
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Listen to any text read aloud in your browser. Free text-to-speech with natural voices, speed and pitch control.
Supports any language your browser voices cover
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Voice Settings
Read Text Aloud is a free browser-based text-to-speech (TTS) tool that converts any written text into spoken audio using your browser's built-in Web Speech API. Simply paste your text, choose a voice and language, adjust the speed and pitch, and press Play - no downloads, no sign-ups, no server uploads.
The tool is powered by the SpeechSynthesis API, which is natively supported in Chrome, Edge, Safari, and Firefox. The available voices depend on your operating system: Windows provides Microsoft voices (including neural voices on Windows 11), macOS offers high-quality Siri voices, and Android/Chrome includes Google's voices. Most systems offer voices in 20+ languages.
Proofreading is one of the most popular use cases - listening to your writing read aloud helps you catch errors, awkward phrasing, and missing words that your eyes skip over. Writers, students, and content creators use TTS tools to review drafts more effectively than silent reading alone.
Other common uses include language learning (hearing correct pronunciation), accessibility (for users with dyslexia or visual impairments), multitasking (listening to articles while doing other tasks), and content review (checking how marketing copy or scripts sound when spoken).
The tool uses your browser's built-in Web Speech API (SpeechSynthesis) to convert text to audio. The voices available depend on your operating system and browser — no external API or server is needed.
Yes, completely free. There are no limits on text length, number of uses, or voice selections. No account or sign-up required.
Available voices depend on your operating system and browser. Windows typically includes Microsoft voices, macOS includes Siri voices, and Chrome on Android includes Google voices. Most systems offer 10–50+ voices across multiple languages.
Yes. The speed (rate) slider goes from 0.5x (half speed, useful for learning) to 2x (double speed, useful for proofreading). The default is 1x (normal speed).
No. The Web Speech API processes everything locally in your browser. Your text never leaves your device.
Absolutely. Listening to your text read aloud is one of the most effective proofreading techniques — your ear catches errors your eyes miss, including awkward phrasing, missing words, and run-on sentences.
Voices load asynchronously when the page opens. If the dropdown is empty, try clicking the refresh button next to it. Some browsers (especially Firefox) may take a moment to load available voices.
Calculate time alignment settings for secondary delay speaker lines at concert venues. Apply Haas effect precedence offsets to lock the sound image to the stage.
Tap along to the rhythm to calculate the BPM (Beats Per Minute) of any song instantly.
Generate customizable audio frequency sweeps (20Hz to 20kHz) in your browser. Test subwoofers, speakers, and room acoustics with linear or logarithmic sweeps.
Convert any frequency in Hertz (Hz) to its corresponding musical note instantly.