Stop losing words after the video
save words from YouTube subtitles
You can understand a word once and still forget it the next time. SubLex keeps the word, translation, sentence, and video context together.
YouTube vocabulary cards
Save words from YouTube subtitles and practice them later.
SubLex turns useful subtitle words into a personal vocabulary workflow: hover, save, organize by language, and review with cards.
From subtitle to practice
Watch → Understand → Save → Practice
SubLex keeps the learning loop close to the YouTube video, then moves saved vocabulary into your personal dictionary and cards.
How the workflow feels
Save in one click
Use the tooltip button to save useful words while watching.
Organize automatically
Words are grouped into language dictionaries, so German, English, French, and Spanish stay separate.
Review with cards
Practice saved words later instead of rebuilding word lists by hand.
FAQ
Before you install
Can I save words without leaving YouTube?
Yes. Hover a subtitle word, open the tooltip, and save it from the video page.
Are dictionaries separated by language?
Yes. SubLex organizes saved words into language dictionaries automatically.
Can I add words manually?
Yes. The website also supports adding words directly to existing or custom dictionaries.