We provide free online sound processing tools to help you enjoy and explore the sounds around you.
Use your device’s microphone to reverse, speed up, or slow down audio playback. You’ll hear your voice like never before!
Measure your vocal range and discover how wide your range is.
About#
At Sound Tools, our goal is to offer simple yet powerful audio editing tools that run right in your browser.
Reverse audio, mix sounds, or try fun effects — everything is easy to use.
We’re continuously working on new apps and features, so stay tuned!
FAQ#
Is any of my audio recorded or stored?#
Not at all. Your audio is processed only within your browser and never saved on our servers.
To ensure the best user experience, we do not offer an offline version. All features work exclusively online.
CHANGELOG#
April 2025#
– Initial release.
Voice Range Online is a free web app that lets you easily measure and visualize your vocal range — no installation or account required!
🎙️ Voice Recording & Pitch Detection
With a single click, record your voice and detect its pitch (F0, fundamental frequency).
Lower voices have lower F0, while higher voices have higher F0.
Although typical ranges exist for male and female voices, some people have a much wider range.
This app uses the pYIN (probabilistic YIN) algorithm, a high-precision pitch estimation method based on a probabilistic model, improving on the original YIN technique.
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Voice Reverser Online is a fun web app that lets you easily record and apply effects to your voice right in the browser — no downloads or sign-ups required!
Here’s what it looks like:
🎤 Voice Recording
You can record your voice with a single click.
Sound is a vibration that travels through the air. When a person speaks, their voice creates these vibrations, which can be captured as digital data by a microphone on your computer or phone.
For example, if you say “Nice to meet you,” the sound can be visualized like this: ...