cubetastic33 / H2K

Browser extension that converts text on a webpage between hiragana and katakana

H2K

If you're learning Japanese, you'll probably notice that your katakana reading speed is slower than your hiragana reading speed, due to a lack of practice. This extension fixes that by letting you convert hiragana on a webpage to katakana. It also lets you do the reverse, which can be helpful if you don't know katakana yet.

H2K's functionality is customizable - you can make it run by default on all webpages on both the initial load and whenever the content updates, or you can disable them selectively. You can also add overrides for specific websites - for example, you can disable H2K entirely on one website, and enable conversion on the initial load alone on another.

Installation

For firefox, you can install it from the firefox add-ons site.

For Chrome, Brave, Edge, Vivaldi, and other Chromium-based browsers, you can install from source using the instructions below.

Installing from source

Chromium-based browsers

• Download the source code of this repo
• Enter chrome://extensions in the URL bar
• Enable the switch for developer mode
• Click on the 'Load unpacked' button
• Select the folder with the source code

Here's a GIF demonstrating the process, along with how to change the default keyboard shortcuts. The GIF uses chrome, but the process is the same on brave, opera, and other chromium-based browsers.

Firefox

• Download the source code of this repo
• For the storage functions to work, you need to specify an add-on ID, so open the manifest.json file and add something this with any ID you want:

"browser_specific_settings": {
    "gecko": {
        "id": "hiragana@katakana"
    }
},

• Enter about:debugging in the URL bar
• Click on 'This Firefox' in the left sidebar
• Click on the 'Load Temporary Add-on...' button
• Select any file inside the source code folder

Screenshots