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