# Cesure > Cesure is a guitar tablature editor and player that runs in the browser, and on Android and iOS: tab, standard notation and piano roll of the same score, audio-to-tab transcription, free practice tools, and a catalog of free classical guitar tabs. Assistants such as ChatGPT and Claude write and edit Cesure scores through its MCP server. The pages below are static HTML and read without running anything; the app itself (https://cesure.app/app) is a WebAssembly application. Each page also exists in French (https://cesure.app/fr/…) and Spanish (https://cesure.app/es/…), except the format specification, in English only. Agents read and write scores in one format, .cesure, specified below. ## Site - [Cesure — Guitar Tab Editor with AI Transcription](https://cesure.app/): Guitar tab editor in your browser: tablature, standard notation and piano roll of the same score, all editable. Convert audio to tab, play in sync with another musician, tune, loop and export a printable PDF. - [Privacy Policy](https://cesure.app/privacy): Cesure ("we", "us") is committed to protecting your privacy. This policy explains what data we collect, why, and how we use it. - [Terms & Conditions](https://cesure.app/terms): By downloading or using the Cesure app, you fully agree to these Terms and Conditions. Please read them carefully before using the app. - [Legal Notice](https://cesure.app/legal-notice): The cesure.app website and the Cesure apps (web, Android, iOS) are published by the sole proprietorship described below. The French version of this notice is the authoritative one; the English and Spanish versions are translations of it. - [Terms of Sale](https://cesure.app/terms-of-sale): These terms of sale govern what Cesure sells: a score from the marketplace and the Cesure Pro subscription. They complement the Terms & Conditions (cesure.app/terms). The French version is the authoritative one; the English and Spanish versions are translations of it. - [Creator Terms](https://cesure.app/creator-terms): These terms apply to anyone who publishes a score on Cesure's marketplace, the "creator". You accept them by ticking the box provided at the "Rights" step of publishing, before your first publication and again for each new version of these terms; the version accepted and its date are recorded on your account. A publication for a price is refused as long as the version in force is not accepted. They complement the Terms & Conditions (cesure.app/terms). The French version is the authoritative one; the English and Spanish versions are translations of it. ## Free tools (in the browser, no install) - [Tuner](https://cesure.app/tuner): Free online guitar tuner. Tune with your microphone in the browser, with an adjustable reference pitch — nothing to install. - [Metronome](https://cesure.app/metronome): Free online metronome. Keep a precise tempo with sound or vibration, straight from your browser — nothing to install. - [BPM Detector](https://cesure.app/bpm-detector): Find the tempo of any song, free and in your browser. Tap along, or let Cesure listen and read the BPM for you. - [From a Sound](https://cesure.app/from-sound): Get the chords of any recording, free and unlimited. The analysis runs on your device — nothing is uploaded. - [Score file converter](https://cesure.app/file-converter): Free score file converter. Turn a Guitar Pro, MIDI, MusicXML or AlphaTex file into MusicXML, MIDI, AlphaTex or a PDF tablature — right in your browser, nothing is uploaded. - [Pick your scale](https://cesure.app/scale-picker): Explore musical scales in your browser. Pick a root and a scale type, and see the notes it contains. Free, nothing to install. - [Player](https://cesure.app/play): Play guitar tabs online, in tablature or piano roll. Loop a passage, slow it down, and practise at your own tempo. Free. - [Editor](https://cesure.app/edit): Free online guitar tablature editor. Write and edit your tabs in the browser, then export them for free to PDF, MIDI, MusicXML or AlphaTex — or to WAV with Pro. ## Guides - [Audio to Tab Converter — Transcribe & Fix in One Place](https://cesure.app/audio-to-tab-converter): Convert MP3, WAV or FLAC to guitar tab with AI — then correct the draft right in the editor, note by note. 3 free conversions a month, empty results never count. Free chord detection runs on your device. - [Chord Finder — Get the Chords of Any Recording, Free](https://cesure.app/chord-finder): Find the chords of any song from an audio file. The analysis runs entirely on your device — nothing is uploaded, no account needed, free and unlimited. The grid scrolls in time while the track plays. - [Guitar Pro Alternative — Free, In Your Browser](https://cesure.app/guitar-pro-alternative): Looking for a Guitar Pro alternative? Cesure edits guitar tabs in your browser, transcribes audio to tab with AI, and lets you play in sync with others. Free to start, no install, 7-day Pro trial without a card. ## Free guitar tabs - [Free guitar tabs](https://cesure.app/tabs): Classical guitar tablatures, free to play and print. Open a piece to see it, hear it and practice it in Cesure. — [every piece as JSON](https://cesure.app/tabs/catalog.json): slug, titles, composers, license — a piece's page is https://cesure.app/tabs/, its score https://cesure.app/tabs/.cesure; [the paged listing, searchable](https://api.cesure.app/catalog?q=&lang=en) ## The .cesure format - [.cesure format — open specification](https://cesure.app/format): The open specification of .cesure, the tablature format of Cesure: a JSON skeleton, a compact notation for the notes, and a JSON Schema for tools and agents. — [the JSON Schema of the current version](https://cesure.app/format/schema/v2.json) - [band.cesure](https://cesure.app/format/examples/band.cesure): an example document - [simple.cesure](https://cesure.app/format/examples/simple.cesure): an example document - [song.cesure](https://cesure.app/format/examples/song.cesure): an example document ## Assistants (ChatGPT, Claude, any MCP client) - [Cesure in ChatGPT and Claude — add the connector](https://cesure.app/assistants): Add Cesure to ChatGPT or Claude as a custom connector: your assistant writes guitar tabs, reworks bars, transposes, searches the catalog and opens the score in Cesure. How to link it, what it can and cannot do, how to unlink it. - [MCP server](https://api.cesure.app/mcp): Streamable HTTP, no session. Its tools write, read, edit, transpose and refinger scores in the .cesure format, search the catalog and open a score in Cesure without an account; a Cesure account linked by OAuth adds the user's own library. To open a score in Cesure, give the user the link the server's `open_in_cesure` tool returns; a catalog piece opens at its page under /tabs.