About Us

PitchDetector.com is an independent website with 34 free, browser-based music tools and a library of guides about pitch, notes, frequency, tuning, singing and ear training. The tools need no account or download, analyse sound on your own device, and are tested with known audio before every release.

The site began with one simple need: finding the pitch of a voice or instrument in a web browser, without installing anything. Our flagship PitchDetector still does exactly that, showing the note, the frequency in hertz and how many cents sharp or flat you are. Around it we have built tools for singers, instrumentalists, students, teachers and music creators.

Why We Built PitchDetector.com

Many pitch and tuning tools give a number without context, ask you to install something first, or hide how uncertain the measurement is. We wanted the opposite. A useful pitch tool should help you understand:

  • which note was detected and in which octave;
  • what frequency was measured, in hertz;
  • whether the sound is sharp, flat or close to the tuning reference, in cents;
  • how steady the reading is;
  • what can affect the result, such as noise, vibrato or chords;
  • when a browser tool is not the right measuring instrument.

That combination of practical tools and clear technical explanations is still what we are building.

What You Can Do Here

  • Sing and train your voice: find your range with the vocal range test, check notes with the singing note detector and follow your pitch with the voice pitch analyzer. More in the Vocal Range hub.
  • Tune an instrument: chromatic, guitar, ukulele, violin and all-instrument tuners, collected in the Instrument Tuning hub.
  • Train your ear: pitch matching, intervals and a pitch accuracy test in the Ear Training hub.
  • Work with songs: find the key, chords and tempo of a song, shift its pitch, turn a melody into MIDI or view its spectrogram.
  • Look things up: converters and reference charts for notes, frequencies and ranges, plus a glossary of pitch and audio terms.

Every tool is listed on our free online music tools page, and the guides are organised in the Knowledge Hub.

Who PitchDetector.com Is For

Singers and vocal learners

Singers use the site to find notes, match pitch, see whether a note is sharp or flat, learn their range and understand intonation. The tools support practice; they do not replace a voice teacher, and they are not a medical assessment.

Instrumentalists

Players identify single notes, tune their instruments, practise intonation and compare what they play with the expected frequency. Every instrument has its own mix of harmonics, so we build tuners for each family instead of one generic meter.

Students and teachers

Frequency, octaves, cents, harmonics, intervals and scales are easier to learn when you can hear a sound and see the numbers at the same time. Teachers use the tools as a live visual aid in lessons.

Music and audio creators

Songwriters, producers and DJs use the key, chord, tempo, pitch-shift, MIDI and spectrogram tools for quick reference and sketching. For mastering decisions or calibrated measurement, professional software and hardware are still the better choice.

Independent and Free

PitchDetector.com is not owned by an instrument maker, app developer or music school, and the core tools are free to use without creating an account. The site shows no display ads. It is supported by affiliate links on our singing-lesson guides, such as our 30 Day Singer review: if you start a 30 Day Singer trial or subscription through one of those links, we may earn a commission at no extra cost to you. Those links are marked as sponsored, and each page that has one says so. Commercial arrangements never change the output of a tool, the maths behind it or the limitations we document.

Your Privacy: Audio Stays on Your Device

Microphone access is sensitive, so we keep it simple: a tool asks for the microphone only when you press Start, and the sound is analysed in your browser’s memory. Your voice and the audio files you open are not uploaded to our server. Settings such as your tuning reference are stored in your own browser. Our data security page explains audio handling in detail, and the privacy policy covers the rest of the website, such as analytics, and our cookies policy lists the cookies and browser storage the site uses. We do not describe the whole site as “zero data collection”, because normal website operation can involve other technical data.

How We Build and Test Our Tools

Each tool is designed for the job its users are doing: a tuner looks and behaves like a tuner, a converter like a calculator, a game like a game. Before a version is released, it is tested with generated audio whose correct answer is known, first offline against the engine and then in a real browser with a simulated microphone, including phone-sized screens and accessibility basics.

We publish the results rather than vague promises. For example, our pitch engine read 484 of 488 test tones within ±3 cents, and our key finder named the exact key of 172 of 185 test tracks. The full results, test conditions and limits are on our methodology page, and every version and fix is recorded in the changelog.

How We Approach Accuracy

Pitch detection is an estimate from a real sound, and real sounds are messy. Background noise, a weak microphone, room echo, strong harmonics, vibrato, distortion, chords and several sources at once can all move a reading. A clean, sustained single note gives the most reliable result. We explain these limits on the tool pages and avoid claims such as “perfect accuracy” or “professional-grade” that we cannot back with evidence. For laboratory measurement, calibration or medical voice assessment, dedicated equipment and qualified professionals are the right choice.

Our Editorial Standards

  • Explain technical ideas in plain language and show the numbers behind them.
  • Check note, frequency and cents values against the equal-temperament formula.
  • Prefer primary sources: research papers, official documentation and standards.
  • Describe what each tool actually does today, and update the page when the tool changes.
  • Separate music education from medical advice.
  • Correct errors when they are reported, and say so.

Who creates and reviews our content, how we research it, how we use AI-assisted tools and how corrections work is described on our Authors and Editorial Policy page. Our disclaimer explains the limits of our tools and information, and our accessibility statement explains how we make them usable for everyone.

Where to Find Each Kind of Information

We keep technical, legal and editorial information on separate pages so each one can be precise and easy to update:

  • Methodology: how the tools calculate their results and how we test them.
  • Changelog: every tool version and fix, by date.
  • Data security: how microphone audio and files are handled.
  • Privacy policy: website data, analytics, cookies and your rights.
  • Cookies policy: the Google Analytics cookies and the settings our tools save in your browser.
  • Disclaimer: the limits of our tools and information.
  • Authors and editorial policy: who writes and reviews content, and how corrections work.

Feedback, Corrections and Technical Problems

If you find a factual error, a broken tool, a wrong result, outdated information, an accessibility issue or a privacy concern, please tell us at support@pitchdetector.com. Including the page address, your device, browser and operating system, and a short description of what happened makes the problem much easier to find. For common microphone and browser problems, see troubleshooting.

Contact

Our Commitment

Useful tools should explain their results, admit their limits and let you check important claims. We will keep improving the tools, the guides, the testing and the documentation, and we will keep recording those changes where you can see them.

Last reviewed: September 27, 2026.

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