Lexpad
The word and its meanings
As the card showed them: meanings, part of speech, level and pronunciation, all editable in your notebook.
YouTube subtitlesSave words from
YouTube subtitles.
Learning a language with YouTube? With the free Lexpad extension, point at a subtitle and the video waits for you. Click a word, or drag across a few, and its meaning opens on the video. Add it, and the subtitle line becomes its example, with a link back to that moment in the video.
Updated . Checked against the app on 22 October 2026.
Point. The video pauses and the word under the pointer is underlined.
Click. The card opens right above the word, with the line as “Seen in”.
Add. Added to your notebook. Close the card and the video plays on.
- Price
- Free extension
- Browsers
- Chrome, Edge, Brave, Opera, Firefox
- On YouTube
- Normal, theater, full screen, mini player
- Subtitles
- Any language, auto-generated too
- Saved with it
- The line and a link to the moment
How it works
- Install and connect. Add the free Lexpad extension to Chrome, Edge or Firefox, click its toolbar button and choose Connect to Lexpad. You sign in through the Lexpad web app, never in the extension.
- Turn subtitles on. Open a video on youtube.com and turn subtitles on (CC). Watch as usual: nothing changes until you point at a subtitle.
- Rest the pointer on a word. After a short rest the video pauses and the word under the pointer is underlined. Passing over the subtitles on the way to the controls does not stop the video.
- Click a word, or drag across a phrase. Click one word, or drag across up to four words, such as “get the hang of”. The Lexpad card opens on the video, just above the subtitle, with the meaning, part of speech, level and pronunciation, written by AI.
- Add it, and watch on. Press Add to Lexpad or Enter. The card closes and the video plays on. Changed your mind? Esc, the × or Cancel closes it, and moving the pointer away also lets the video play.
It works in YouTube’s normal view, theater mode, full screen and the mini player. YouTube’s own keys (space, K, J, L, F and the arrows) and a click on the video work as before.
What is saved with the word
Everything goes into your own Lexpad notebook, where the word comes back for practice on a schedule.
The subtitle line
The whole line becomes the word’s example. Speaker marks such as “>>” and labels such as “[Music]” are left out.
The moment in the video
A private note: “Seen on” the video’s title, the time, and a link that starts two seconds before you clicked, so you hear the line again.
Any subtitle language
- Subtitles a creator wrote and YouTube’s auto-generated ones both work, in any language.
- Right-to-left subtitles, such as Persian and Arabic, work too: a click takes the whole word.
- Chinese and Japanese have no spaces between words: drag across the characters you want.
- The card is written in your notebook’s languages: Lexpad has 81 languages, in any pair. If a word is in a script your chosen notebook cannot hold, it goes to the one notebook that can, and the card tells you which.
Your choice: pause or play on
Two switches in the extension menu, both on at first: Click words in YouTube subtitles and Pause the video while I point at subtitles. Turn off only the pause and the video keeps playing while you point; a click still opens the card. Turn off the first and YouTube’s subtitles behave exactly as before. Both apply at once, without reloading the video.
Learning words from YouTube videos
A video is a good place to meet words: you hear how they sound and see when people use them. The hard part is keeping them. A few habits help:
- Subtitles in the language you are learning, not in your own. You read and hear the same words, and you can click them.
- Pick videos a little above your level, where you follow the story but meet a few new words or phrases.
- Save phrases, not only single words. Drag across “get the hang of” or “figure it out”: a phrase in its line is easier to reuse than a lone word.
- Keep a few per video. Save the words you would like to use yourself, not every word you do not know.
- Review them on a schedule. Each saved word comes back in Lexpad on growing gaps (today, then after 1, 3, 7 and 21 days), and the link in its note plays the line again.
Why the sentence and the spacing matter: How to memorize vocabulary. Reading too? Save new words while reading online.
Privacy
- It reads the subtitle on the screen only while your pointer is on it, inside your browser, to underline the words. It keeps no record of what you watch.
- While you just watch, nothing about the video leaves your browser. When you click a word, the word and its subtitle line are sent so the meaning can be written.
- Only when you add the word are the video’s title and its address with the moment saved with it, as your private note.
- Version 0.4.0 asked for no new permission: the same storage, right-click menu, sign-in window and Lexpad API as before. Read the privacy policy.
What it does not do
- It works on youtube.com itself, not in YouTube players embedded in other websites.
- It does not work on Netflix or other streaming sites.
- It does not translate or add subtitles: it uses the subtitles YouTube shows, so the video needs them, written or auto-generated.
- It is a browser extension for computers. On a phone, add the word in the Android app or the web app.
Price
The extension is free. Each meaning it writes uses the same AI allowance as the app: 25 AI cards a day (400 a month) on Free, 150 AI cards a day (2,000 a month) on Pro. Both the daily and the monthly number apply: the daily one comes back after midnight UTC, the monthly one on the 1st (UTC). Every new account gets Pro free for 14 days, no card needed. Pricing.
Good to know
Questions
Is it free?
Yes. The extension is free on every plan. The meaning on each card uses your daily AI allowance (25 AI cards a day (400 a month) on Free). You need a free Lexpad account to save words.
Does it work in full screen?
Yes. The card opens inside the player in normal view, theater mode, full screen and the mini player.
Does it slow YouTube down?
It does nothing until you point at a subtitle. In our test on a 111-minute lecture with subtitles, the extension used about 8 to 15 milliseconds of processor time per minute of watching.
Does it record what I watch?
No. It reads a subtitle only while your pointer is on it, and keeps no record of what you watch. The word and its line are sent only when you click a word, and the video’s address is saved only with a word you add.
Which languages work?
Subtitles in any language, written by the creator or auto-generated, including right-to-left Persian and Arabic, and Chinese and Japanese (drag across the characters). The card is written in your notebook’s languages.
Chrome, Edge or Firefox?
All three, on a computer: the Chrome Web Store (also for Brave and Opera), Microsoft Edge Add-ons and Firefox Add-ons. Safari is not supported.
Can I keep the video playing?
Yes. In the extension menu, turn off Pause the video while I point at subtitles. A click still opens the card.
Does it work on Netflix or on videos embedded in other sites?
No. It works on youtube.com only. On any other page you can still select a word and add it with the extension’s usual + button.
Lexpad
Keep the words you hear.
Add the free extension, turn on subtitles, and click the next word you want to keep.