Free browser tools
Japanese Furigana Annotator
Paste Japanese text and add hiragana or romaji readings above kanji directly in the browser.
Annotate Japanese text
The Japanese dictionary will load when you run the tool.
Your result
Submit Japanese text to see ruby annotations above kanji.
What this tool does
It uses browser-side Japanese morphological analysis to detect kanji readings, then renders the result with standard HTML ruby tags.
Dictionary loading
The Japanese dictionary is downloaded on first use. After that, the browser cache usually makes loading faster.