How to transcribe music online for free: a beginner’s guide

Music transcription means writing down the music you hear: which notes are played, when they start and stop, and what chords they make. Musicians have always done it by ear, with an instrument in one hand and a pencil in the other. Today a free online music transcriber can do the first pass for you in a minute or two, straight from a recording, with nothing to install.

This guide walks through a complete transcription with Noteform, from choosing audio to downloading the finished notes, and explains what to expect at each step.

What an online transcriber gives you

Noteform listens to a recording and produces two lists:

• Notes: every note it detects, with its name in scientific pitch notation (middle C is C4, the A above it is A4), its start and end time, and its length.
• Estimated chords: chord names worked out from the detected notes, such as C, Am, G7 or F/A, each with the time it starts and ends.

It doesn’t produce sheet music, and it doesn’t guess the tempo, the key, bar lines or rhythm values. What you get is a precise, time-stamped list of pitches that you can read, correct and play from. For learning a song, checking your own playing or writing down an idea, that’s usually exactly what you need.

Step 1: choose your audio

There are three ways to get music into the transcriber:

1. Upload a file. Click Upload file or drop a file anywhere on the tool. MP3, WAV, FLAC, M4A/AAC, OGG and WebM all work, up to 100 MB and 10 minutes long.
2. Record a browser tab. Click Record tab audio, pick the tab that’s playing the music, and switch on Share tab audio. This works best in Chrome and Edge on a desktop computer.
3. Record an instrument or voice. Click Record input to capture a microphone or audio interface.

Not sure what to try first? The demo recording link under the drop area generates a short piano-like chord progression in your browser, so you can see a real transcription without finding a file. Whatever you choose, only use audio you have the right to use.

Step 2: pick the part you want

Once the audio loads you’ll see its waveform. Drag across it to select a range, or type exact start and end times. Transcribing eight bars is much quicker than a whole song and far easier to check, so start small. Times in the results always refer to the original recording, so a note at 01:12.480 is at 1 minute 12.48 seconds into the file, whichever range you picked.

Tick Loop selection to hear the range repeat while you listen. It’s the easiest way to get the passage in your ear before you look at any notes.

Step 3: choose a detection mode

• Polyphonic detects several notes at once, using Spotify’s Basic Pitch model. Choose it for piano, guitar, bands and anything with chords. It’s also the only mode that estimates chords.
• Single melody follows one note at a time, using the pYIN pitch tracker. Choose it for a voice, flute, trumpet or any solo line, especially when the melody is clearly louder than anything else.

Then press Transcribe. The progress steps show what’s happening: loading the note model, preparing the audio, detecting notes and estimating chords. Cancel stops it at once if you picked the wrong range.

Step 4: check the result by ear

Automatic transcription is a fast first draft, not a finished answer. Press play and the note list highlights each row as it sounds, while a keyboard shows the notes playing right now. Click any row to jump to that moment. Two marks tell you where to listen hardest:

• ? means the detector’s evidence for that note was weak.
• overtone? means the note may be a harmonic of a lower note, usually an octave or an octave and a fifth above it, rather than a note someone actually played.

Step 5: correct what’s wrong

Edit any note’s pitch, octave, start or end. Use + Add note for anything the detector missed, delete notes that shouldn’t be there, and remove every flagged overtone in one click. Undo is always available, and you can reset to the original detection at any time. Switch between sharps and flats so the notes read naturally for the key you’re in.

If you change notes, the chord estimates are marked out of date. Press Recompute chords to update them from your corrected notes.

Step 6: export

Download TXT saves a plain-text file you can open anywhere: a short header saying what was analysed, a table of every note with its start, end, length and marks, and the estimated chords with their times. JSON saves the same data in a structured format for use in other programs.

Is it really free and private?

Yes. There’s no account, no trial and no limit on how many recordings you transcribe. The analysis runs inside your browser on your own computer or phone, so your audio is never uploaded. The site is supported by ads, which you can read about in the privacy policy.

Ready for something more specific? Read how to find what notes are being played in a song or how to find the chords of a song.