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10ten Japanese Reader vs Yomitan: catalog facts
10ten Japanese Reader	Yomitan
Free Free to use; source code is published on GitHub.	Free Free and open source.
Browser extension	Browser extension
Translations appear on hover without leaving the page Actively developed with frequent commits	Instant hover lookups without leaving the page Continues Yomichan with active maintenance
Only helps with Japanese text Works inside the browser, not in other desktop apps	Dictionaries must be found and imported separately Setup takes some effort for new users
Browser extension	Browser extension
Closed source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	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.