Free tools
Free voice & audio tools
A small kit of free, browser-based tools for working with your microphone and voice — no install, no sign-up, nothing uploaded. Test your mic, record and download audio, turn speech into text, and read text aloud. They're also a live taste of what OpenBroca does on the desktop: voice as a real input layer.
Microphone test
Check that your mic works and watch a live input-level meter. Pick the right input device in seconds.
Mic test — record & playback
Record a short clip and play it straight back, so you can hear exactly how your microphone sounds.
Online voice recorder
Record audio in your browser, pause and resume, then download the file. No install, no account.
Speech to text
Dictate and watch your speech become text in real time, in 12 languages — a live voice-typing demo.
Text to speech
Type anything and hear it read aloud with on-device voices. Adjust the speed and pitch.
Speaking speed (WPM) test
Speak naturally and find out your words-per-minute, with a rating from slow to fast.
Speech time calculator
Paste a script to estimate how long it takes to say aloud — no microphone needed.
Background noise test
Measure the ambient noise your mic picks up and see whether your room is quiet enough.
Speaker & headphone test
Play test tones and check your left and right channels — no microphone permission needed.
Private by default
Every tool here runs entirely in your browser using standard web APIs (getUserMedia, MediaRecorder, and the Web Speech API). Your microphone audio and text are processed on your device and are never sent to our servers — most tools don't even keep a recording once you reload the page. It's the same principle behind OpenBroca: your voice should stay yours.
From browser demo to your whole desktop
These tools are handy on their own, but they only work inside this tab. OpenBroca takes the same idea system-wide: speak and your words are typed into whatever app is focused — editors, browsers, chat, the terminal — using cloud or fully on-device models you choose. It's free and open source for macOS, Windows, and Linux. Download OpenBroca or read about offline speech-to-text.