Frequency Detector
Detect, analyze, and generate frequencies in real time — right in your browser. 312+ professional-grade audio tools for musicians, engineers, and researchers. No sign-up required.
⚡ Frequency Detector
The most powerful browser-based frequency detector. Detect, analyze, and identify any sound in real time.
| # | Hz | Note | Harm. | dBFS |
|---|---|---|---|---|
| Start to detect | ||||
Explore 312+ Tools
From real-time frequency detection to binaural beats, every tool runs 100% in your browser — no downloads, no data leaves your device.
Frequency & Pitch Detection
Real-time Hz detection, pitch detection, harmonic analysis, frequency sweeps, beat detection, and AI-powered note recognition.
Explore tools →Music Theory & Tuning
Guitar tuner, chord finder, scale generator, key detector, BPM calculator, metronome, ear training, and temperament calculators.
Explore tools →Converters
Hz to kHz, note to frequency, BPM to Hz, dB to amplitude, wavelength calculator, sample rate converter, bitrate calculator, and more unit conversions.
Explore tools →Acoustic Physics
Speed of sound, Doppler effect, room modes, standing waves, Helmholtz resonator, natural frequency, wave interference, and more calculators.
Explore tools →RF & Signal Analytics
Radio frequency calculator, WiFi frequency tool, AM/FM frequency finder, bandwidth calculator, and signal modulation tools.
Explore tools →Signal Processing & DSP
Spectrum analyzer, FFT, spectrogram, oscilloscope, filter calculators, EQ finder, crossover calculator, phase tools, and more.
Explore tools →Wave Generators
Sine, square, triangle, sawtooth wave generators. White, pink, brown noise. Frequency sweep test and multi-frequency mixer.
Explore tools →Binaural & Brainwave
Binaural beats, isochronic tones, alpha/beta/theta/delta/gamma wave generators, solfeggio frequencies, 432 Hz, chakra healing, sleep induction, and Schumann resonance.
Explore tools →Microphone & Diagnostics
Mic test, hearing range test, tinnitus frequency matcher, mosquito sound test, stereo channel tester, background noise detector, echo detection, and latency tester.
Explore tools →Decibels & Loudness
dB meter, LUFS meter, SPL calculator, loudness normalization for Spotify/YouTube/broadcast, dynamic range meter, compression visualizer, and SNR calculator.
Explore tools →Audio File Utilities
Audio converter, trimmer, speed changer, pitch shifter, pitch correction, silence remover, loop maker, vocal range test, and formant analyzer.
Explore tools →Voice & Speech Analysis
Vocal range test, pitch accuracy checker, voice type classifier, voice gender analyzer, vibrato analyzer, speech clarity tester, and vocal warmup guide.
Explore tools →Room Acoustics & Treatment
Room frequency analyzer, acoustic panel placement, speaker placement optimizer, bass trap calculator, Sabine RT60, sound isolation estimator, and diffuser designer.
Explore tools →Speaker & Output Testing
Speaker frequency response test, subwoofer test tones, headphone test, surround sound channel test, bass extension, stereo imaging, and distortion analyzer.
Explore tools →Education & Ear Training
Perfect pitch test, frequency quiz, interval ear trainer, EQ blindfold test, chord and scale recognition, tone memory game, and audio skills tracker.
Explore tools →Noise Analysis & Monitoring
Noise type identifier, environmental noise monitor, noise pollution meter, appliance hum detector, spectrum analyzer, noise floor analyzer, office & sleep environment checkers, noise exposure calculator, HVAC & traffic noise analyzers, and noise comparison tool.
Explore tools →Vibration & Mechanical
Vibration FFT analyzer, RPM-to-Hz converter, bearing fault frequency calculator (BPFO/BPFI/BSF/FTF), engine vibration analyzer, ISO 2372 severity checker, structural resonance, gear mesh frequency, and spring-mass resonance calculator.
Explore tools →Ultrasonic & Infrasound
Hearing age test, mosquito frequency test, animal hearing range simulator, ultrasonic leak detector, infrasound monitor, ultrasonic tone generator, bat frequency detector, human hearing boundary mapper, and ultrasonic cleaning calculator.
Explore tools →Built Different
Every tool is engineered for precision, speed, and privacy. No compromises.
Zero Latency
All processing happens in your browser using Web Audio API. No server round-trips, no lag. Real-time means real-time.
100% Private
Your audio never leaves your device. No recording, no uploading, no tracking cookies. We don't even have a server to send data to.
No Cost
No signup walls, no premium tiers. Every tool is and always will be free. No strings attached.
Works Everywhere
Desktop, tablet, phone — every tool works on any modern browser. Responsive design tested from 320px to 2560px.
Lab-Grade Precision
FFT-based analysis with configurable resolution. Detect frequencies down to ±0.1 Hz accuracy using your device's microphone.
No Installation
Open your browser and go. No downloads, no plugins, no extensions. Just tools that work. Bookmark and you're done.
How It Works
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Choose a Tool
Browse 18 categories with 312+ specialized audio and frequency tools. Each tool is designed for a specific task.
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Allow Microphone (If Needed)
Detection tools need your mic. You'll see a clear permission prompt. Your audio is processed locally — nothing is recorded or sent anywhere.
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Get Instant Results
See real-time frequency readings, waveform visualizations, spectrum analysis, or generated tones. Copy, download, or share your results.
Ready to Detect?
Open your first tool and start analyzing frequencies in seconds. No account needed.
Frequently Asked Questions
What is a frequency detector?
A frequency detector is a tool that identifies the frequency (measured in Hertz/Hz) of a sound or signal. It uses your device's microphone or an audio input to capture sound, then performs real-time analysis (typically using FFT — Fast Fourier Transform) to determine the dominant frequency, pitch, and harmonic content of the audio signal.
Are there any hidden costs?
No, none at all. All 312+ tools are completely free to use with no signup, no premium tiers, and no hidden fees. Every tool runs entirely in your browser using JavaScript and the Web Audio API.
Is my audio data private?
Absolutely. All audio processing happens locally in your browser. No audio data is ever recorded, transmitted, or stored on any server. We don't use tracking cookies and we have zero access to your microphone data. Your privacy is non-negotiable.
What browsers are supported?
FrequencyDetector.com works on all modern browsers: Chrome 80+, Firefox 78+, Safari 14+, Edge 80+, and Samsung Internet 13+. For best results, we recommend Chrome or Firefox on desktop for microphone-based tools.
How accurate is the frequency detection?
Our frequency detector uses FFT analysis with a sample rate of 48,000 Hz and a configurable FFT size up to 16,384 bins, providing frequency resolution down to approximately ±0.1 Hz. Accuracy depends on your microphone quality, background noise, and the clarity of the sound source.
Can I use these tools on my phone?
Yes! All tools are fully responsive and work on iOS Safari 14+ and Android Chrome/Firefox. Note that iOS requires you to tap a button to start audio processing (an Apple security requirement). Some visualization tools work best on larger screens.