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10ten Japanese Reader vs Kiten: catalog facts
10ten Japanese Reader	Kiten
Free Free to use; source code is published on GitHub.	Free Free and open source under the GPL-2.0-or-later licence.
Browser extension	Windows, Linux
Translations appear on hover without leaving the page Actively developed with frequent commits	English-Japanese and Japanese-English dictionaries Kanji dictionary with several lookup methods
Only helps with Japanese text Works inside the browser, not in other desktop apps	Built around KDE, so it looks most at home on a Plasma desktop Focused on lookup rather than structured lessons
Browser extension	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.