Everything you need to know about Tonify — from first install to advanced pitch control.
Tonify is a free Chrome extension that lets you transpose (pitch-shift) any audio or video playing in your browser — in real time, with no downloads or installs beyond the extension itself.
Whether you want to match a song to your vocal range, tune a YouTube lesson to your instrument, or fine-tune by individual cents, Tonify does it all directly inside your browser tab.
Tip: If the extension doesn't respond right away, refresh the page and start playback before opening Tonify.
Tonify is a Chrome extension and works on any Chromium-based desktop browser, including:
Tonify is not available for Firefox, Safari, or any mobile browser (iOS or Android) at this time.
Tonify works with most websites that play audio or video through standard HTML5 media elements, including:
Some sites use non-standard players or DRM restrictions that may prevent Tonify from connecting. See the Troubleshooting section if a site isn't working.
Yes — Tonify is completely free. There are no subscriptions, no premium tiers, and no feature paywalls. Every control (pitch shift, fine-tune, and all future features) is available to every user at no cost.
We built Tonify because we believe musicians and learners should have powerful tools without financial barriers. If you'd like to support the project, the best thing you can do is leave a review on the Chrome Web Store and tell a friend.
You can shift up to ±12 semitones (one full octave up or down).
The Fine Tune slider adjusts pitch in cents — fractions of a semitone. There are 100 cents in one semitone, so this gives you micro-level control for precise tuning.
Use it when:
The range is ±100 cents. Combine it with the main PITCH slider for any pitch in between standard semitones.
Each semitone equals one half-step on a piano or guitar. Here is a quick reference:
| Shift | Equivalent |
|---|---|
| +1 st | One half-step up (e.g. C → C#) |
| +2 st | One whole step up (e.g. C → D) |
| +3 st | Minor third up (e.g. C → Eb) |
| +5 st | Perfect fourth up (e.g. C → F) |
| +7 st | Perfect fifth up (e.g. C → G) |
| +12 st | One full octave up |
| −1 st | One half-step down (e.g. C → B) |
| −12 st | One full octave down |
This is useful for guitarists, singers, and instrumentalists who want to play along without retuning.
Click the ↺ Reset button in the Tonify popup. This instantly returns both the Pitch and Fine Tune sliders to zero, restoring the original audio.
You can also drag both sliders manually back to the centre position.
The ■ CAPTURING indicator means Tonify has successfully connected to the audio on the current page and is actively processing it. The blinking green dot next to live confirms pitch shifting is running in real time.
If you do not see this indicator, it means Tonify has not detected any audio. Try playing the media first, then open the extension.
Tonify operates on one tab at a time — whichever tab is active when you open the extension. If you switch to another tab and open Tonify there, it will connect to that tab's audio instead. Each tab's pitch setting is independent.
Yes. Open a local audio or video file directly in Chrome (drag and drop the file onto a Chrome window, or use File → Open File…) and then activate Tonify as normal.
Supported formats include anything Chrome can natively play: MP3, WAV, OGG, FLAC, MP4, WebM, and more.
Try these steps in order:
Some enterprise, school, or exam-locked browsers intentionally restrict access to audio APIs. Tonify may not work in those restricted environments.
Spotify Web Player can be tricky because it supports Spotify Connect, which may route audio outside the browser tab.
Pitch shifting is CPU-intensive. If your device is under heavy load you may hear artifacts. Try:
Glitches are more common at extreme pitch shifts (close to ±12 semitones) on lower-power devices.
Yes — a small delay between audio and video is a normal side effect of real-time pitch shifting. The algorithm needs a short audio buffer (typically 200–400 ms) to process pitch changes, which causes the audio to lag slightly behind the video.
This is an inherent trade-off in browser-based pitch shifting without access to the video rendering pipeline. We are continuously working to reduce this latency in future updates.
If Tonify is not in the list at all, it may not have installed correctly. Try reinstalling from the Chrome Web Store.
Some websites restrict direct programmatic access to their audio or video elements. On these sites, Tonify may request permission to capture the tab's audio as a fallback method.
Your privacy is important to us. Here is exactly what Tonify does and does not collect:
Tonify complies with Chrome Web Store policies and applicable data protection regulations including GDPR.
No. All pitch-shifting processing happens entirely within your browser using the Web Audio API. No audio data is ever sent to Musestar servers or any third-party service. Your audio stays on your device.
Tonify requests only the minimum permissions required to function:
We do not request access to your browsing history, personal files, camera, microphone, location, or any other sensitive data.
Uninstalling Tonify removes the extension and all locally stored settings. No data is retained by Musestar after uninstallation.
Tonify is free forever. No sign-up, no paywall — just pitch shifting that works.