Toolkit
7 free tools

Free music tools

Practise with a metronome that handles odd meters, swing and accents, find a song's tempo with tap tempo, tune to a reference pitch, set delay and reverb times from the tempo, explore keys on the circle of fifths, convert notes to frequencies, and transpose chord sheets or find the best capo position.

All 7 run in your browser

Every tool in this category

Sorted A to Z. All free, with no account and no sign-up.

Circle of Fifths

Click any key for its signature, relative minor, diatonic chords, and common progressions, with every chord and scale playable in your browser.

Delay & Reverb Time Calculator

Turn any tempo into delay, pre-delay, and reverb times in milliseconds for straight, dotted, and triplet note values, plus matching LFO rates in Hz.

Metronome

Practice with precise browser-timed clicks, tap tempo, custom meters, subdivisions, swing, beat accents, four voices, and a tempo trainer.

Note, Frequency & MIDI Converter

Convert a note name, a frequency in hertz, and a MIDI number in any direction, with cents deviation, a movable A4, and an audible reference tone.

Pitch Pipe & Reference Tone

Play sustained chromatic reference tones for tuning by ear, with open-string presets for guitar, bass, ukulele, violin, and cello, plus octave, waveform, and A4 control.

Tap Tempo & BPM Counter

Tap any key or click along with a track to read its tempo in BPM, with a rolling average, timing steadiness, and a handoff to the metronome.

Transposer & Capo Calculator

Move a song or a chord chart into any other key, and find the capo fret that turns awkward barre shapes into open chords without changing the pitch.

Good to know

How these tools work

Steady timing

The metronome schedules clicks on the audio clock, so the beat stays steady even when the page is busy.

Correct spelling

Scales and transpositions are spelled by letter, so F sharp major shows E sharp and a key change never mixes sharps and flats.

Sound only when you ask

Audio starts when you press play and stops when you leave the page. None of these tools use your microphone.

Questions

Frequently asked questions

Does the metronome work on a phone?+

Yes, in any modern mobile browser. On an iPhone, turn off silent mode if you hear nothing, because the switch also mutes web audio.

Can the transposer read chord sheets?+

Yes. Paste chords over lyrics, a single chord line or a ChordPro file. Only tokens that are clearly chords are changed, so the lyrics stay untouched.

Can I change the A4 reference pitch?+

Yes. The pitch pipe and the note frequency converter let you set A4 anywhere from 390 to 500 Hz, with presets such as 432, 440 and 442 Hz.

Keep exploring

Other categories

PDF

Everything runs in your browser, so a signed contract never leaves your computer. Most of these take files up to 75 MB and 500 pages.

Business

Invoices, receipts and quotes print to an A4 PDF straight from the page. The CV maker and Kanban board save as you go, in this browser rather than an account.

Documents

Draw a signature with a mouse, trackpad or finger, or type one, then download it as a transparent PNG, an SVG or a JPG.

Writing and text

Counters for words, characters, syllables and reading time, a text diff, a notepad that saves locally, and a typing test that compares you with the last hour of results.

Images

Nine of these send the image to our server, where it is converted in memory and not kept. The other eight, including HEIC to JPG and the cropper, never upload anything.

Finance

Loans, mortgages, take-home pay, sales tax, tips, a monthly budget and a splitter for shared costs. The budget and the group ledgers are saved in this browser.

Calculators

The biggest section: dates, ages, grades, units, sleep cycles, dice and timers, plus a scientific calculator that handles complex numbers and solves equations.

Developer

JSON, regex, hashes, UUIDs, JWTs and subnets, plus tests for your keyboard, click speed, dead pixels and refresh rate.

Audio and video

Check a microphone, speakers or webcam before a call, watch sound on a spectrum analyzer, or record from your webcam. Recordings stay in the tab until you save them.

Crypto

Profit and loss, DCA, staking, gas fees and liquidation prices. Nothing connects to a wallet or a price feed; you type the numbers in.

More focused tools, ready when you are.

Explore the growing collection for calculations, documents, writing, and everyday work.

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