Problem solved

WordByWord.io solves the problem of acquiring vocabulary in context without interrupting the reading or viewing experience. Traditional language learning often requires separate tools or dictionaries, but WordByWord enables instant translation and vocabulary building directly within native content, streamlining the process and making learning more natural and efficient.

Use cases

• Learn vocabulary while reading news articles in a foreign language
• Improve language skills while watching YouTube videos with subtitles
• Build a personal glossary from academic PDFs and research papers
• Export saved words to Anki for offline spaced repetition review
• Share curated vocabulary collections with a study group or class
• Track vocabulary knowledge gaps across different types of content

Audience

• Hobbyists
• Researchers
• Content Creators

Pros

• Works on any website, PDF, or YouTube video
• Free core features with no limits
• Spotlight mode shows vocabulary coverage percentages
• Supports over 50 languages
• Export to Anki, CSV, and PDF for portability

Cons

• Only available as a Chrome extension, no Firefox or mobile support
• Unlimited AI features require a paid premium plan
• Dependent on browser integration; no standalone app
• Limited to content with text; not suitable for audio-only media