# KANTAN Chord

> This browser extension will converts various chord sites' song chords to its "degrees", also known as Nashville Numbers.

Canonical page: [https://chrome-stats.com/d/instachordizer](https://chrome-stats.com/d/instachordizer)

## Overview

- **ID:** `instachordizer`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** doco
- **Category:** photos-music-videos
- **Daily users:** 365
- **Weekly downloads:** 1
- **Rating:** 3.50 / 5 (2 ratings)
- **Version:** 2026.8.20.0
- **Last updated:** 2026-08-20
- **First published:** 2021-09-15
- **Size:** 119 KB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/instachordizer/)
- **Website:** [https://en.instachord.com/](https://en.instachord.com/)

## Description

KANTAN Chord is a powerful browser extension designed for guitarists and musicians that converts song chords on popular chord websites into "degrees" or Nashville Numbers. Compatible with major chord sites like Ultimate Guitar Tabs, U-Fret, Guitarians.com, and others, it automatically analyzes the song's key and displays chords in three formats: original chords (C,F,G), Roman numerals (I,IV,V), and numeric degrees (1,4,5). 

With features like key transposition, beginner mode for chord simplification, and options to customize chord display styles, KANTAN Chord helps users easily understand and play songs in various keys. It also supports real-time key change detection, including difficulty rankings for different keys, making it an ideal tool for musicians of all skill levels wanting to learn and play chords effortlessly.

## Rankings

- #6,054 — Overall
- #47 — song
- #50 — tank
- #171 — number

## Permissions and access

### Permissions

- `tabs`
- `storage`

### Content script matches

- `www.ufret.jp`
- `gakufu.gakki.me`
- `www.gakufu.gakki.me`
- `music.j-total.net`
- `tabs.ultimate-guitar.com`
- `*.guitarians.com`
- `guitarians.com`
- `www.91pu.com.tw`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension was recently updated in the past month. New updates may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/instachordizer)