Productivity
WordByWord
Last updated 2026-08-21 · benchmark measured 2026-10-18 — deterministic & reproducible
A Chrome extension for learning vocabulary while browsing websites, PDFs, and YouTube.
WordByWord at a glance
WordByWord is a Chrome extension that lets language learners, students, and other users hover over or click words on any webpage, PDF, or YouTube video to see translations, save them to vocabulary collections, and review them with AI-generated flashcards.
Good for
- Learning new vocabulary directly from websites, PDFs, or YouTube videos you're already using
- Checking how much of a given page or video you can understand based on the words you already know
- Building a personal vocabulary collection that can be exported to apps like Anki, CSV, or PDF
Pricing
Free: hover translations, flashcards, 5 AI training sessions, 10 AI generations. Premium: $5.99/mo for unlimited AI and enhanced voiceover.
Questions people ask
What does WordByWord do?
It lets you hover over or click words on any webpage, PDF, or YouTube video to see translations, save them along with the sentence they appeared in, and review them with flashcards.
Is there a free version of WordByWord?
Yes, the free plan includes hover translations, flashcards, vocabulary saving, 5 AI training sessions, and 10 AI term and example generations.
How much does WordByWord Premium cost?
Premium costs $5.99 per month and adds unlimited AI training sessions, unlimited AI content generation, and enhanced voiceover quality.
Can I use WordByWord with YouTube videos?
Yes, you can turn on interactive subtitles, hover over a word to pause the video, see its translation, and hear it spoken, with the word saved along with the video line.
Can I export the vocabulary I save?
Yes, saved vocabulary can be exported to Anki, CSV, or printable PDF formats.
Written by Legit.Show from wordbyword.io on 2026-10-25. It does not change the score.
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To cite this score: legit.show/s/wordbyword-io/2026-10-18. That address never changes; this page moves with every re-measure.
Legit.Show scored WordByWord 83/100 on 2026-10-18, measured across all 7 frames from its public surface. legit.show/s/wordbyword-io/2026-10-18
Is WordByWord production-ready?
Legit.Show scores WordByWord 83 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on WordByWord (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Reliability; its weakest is Performance. Every frame it averages is published with its evidence on the Legit.Show listing.
The 7 Frames
- Performance — 53/100
- Accessibility — 91/100
- Security — 60/100How this compares across the catalogue: The Web Security Baseline
- Privacy — 75/100How this compares across the catalogue: The Privacy Gap
- Reliability — 100/100
- Standards — 100/100
- Discoverability — 100/100
What we measured
- Security headers present: X-Frame-Options, X-Content-Type-Options, Referrer-Policy.
- No Content-Security-Policy and no HSTS.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 1425 ms to first byte.
- Returns a proper 404 for unknown routes.
- 3 of 3 sampled routes reachable.
- Has a reachable privacy policy.
- Sets cookies / loads scripts with no consent prompt.
Who it's for
Language learners · Students · Content consumers · Multilingual professionals · Casual language enthusiasts
Pricing
Free with core features (translations, vocabulary tracking, flashcards); Premium $5.99/month for unlimited AI sessions and enhanced features
Sources and updates
- Description
- Taken from wordbyword.io's own website on 2026-08-21.
- Operator
- WordByWord.io, as named in wordbyword.io's terms, privacy page or footer.
- Benchmark
- Measured by Legit.Show from the live site, the way any visitor sees it — with no access to its code or accounts. Same method for every product, and no AI decides the score. Last checked 2026-10-18.
Put together from public information, without WordByWord's involvement. If anything here is wrong, tell us and a person will check it.
Visit WordByWord → · Alternatives to WordByWord → · How this was measured →