Video subtitles

Click a word in the subtitles.
Keep it.

On TED, on lesson pages with an HTML5 video and in common web players, rest your pointer on a subtitle and the video waits. Click a word, or drag across a few, and Lexpad shows its meaning. Add it, and the line you heard is saved with it. Free for Chrome, Edge and Firefox.

Available in the Chrome Web StoreGet it from Microsoft EdgeGet the add-on for Firefox

The extension is free and works with a free Lexpad account. After you add it, click Connect to Lexpad and sign in, or create your account. You never type a password into the extension.

Updated . Checked against the app on 24 October 2026.

A paused video of a woman laughing on a terrace at dusk, with the subtitle “And honestly, it was ephemeral.”; the word ephemeral is underlined in green, and a small ⋯ button sits at the end of the line
The real Lexpad extension 0.5.0 on a web page with a plain HTML5 video and a subtitle track, playing a scene from Lexpad’s own film. The pointer rests on the line: the video pauses and the word under it, ephemeral, is underlined. A click opens its card.
Price
Free extension
Where
TED, lessons, common web players
Saved with it
The word, its line, the page and moment
Browsers
Chrome, Edge, Firefox; Brave, Opera and Vivaldi through the Chrome Web Store (how-to)

How it works

  1. Add the extension and connect it. 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.
  2. Turn subtitles on. Open a video on TED, a lesson page or a site with a common web player, and turn its subtitles on. Watch as usual: nothing changes until you point at a subtitle.
  3. Rest the pointer on the line. After a short rest the video pauses and the word under the pointer is underlined. Passing over the subtitles on the way to the player’s controls does not stop the video.
  4. Click a word, or drag across a phrase. Click one word, or drag across up to four. The Lexpad card opens just above the line with the meaning, part of speech, level and pronunciation, written by AI.
  5. Add it, and watch on. Press Add to Lexpad or Enter. The card closes and the video plays on. Moving the pointer away also lets the video play.

It works in full screen too. Your keys, and every other click on the player, stay the player’s.

Where it works

  • TED
  • Lesson pages with an HTML5 video
  • Common web video players
  • YouTube
  • TED, lesson pages and common web players work from the start.
  • YouTube has a page of its own: Words from YouTube subtitles.
  • Film and series services start off. Open the Lexpad menu on the service and turn on its subtitles there.
  • Some course sites start off too, until you turn each one on in the same menu.
  • Have a subtitle file (.srt or .vtt) of your own video? The free Text to flashcards tool turns it into flashcards.
The Videos part of the Lexpad menu, under Other video sites: Click words in video subtitles and Pause while I point at subtitles, both on, and Choose sites

A player Lexpad does not know

Open the Lexpad menu on that site and switch on “Try subtitles on this site”. Lexpad then looks for the text that changes with the video, on that site only. It stays off until you ask, site by site, and you can switch it off again if something looks wrong.

The top of the Lexpad menu: This site, lexpad.app, On, with its switch, and under it Try subtitles on this site, off

What is saved with the word

Everything goes into your own Lexpad notebook, where the word comes back for practice on a schedule.

The word and its meanings

As the card showed them: meanings, part of speech, level and pronunciation, all editable in your notebook.

The subtitle line

The whole line becomes the word’s example, so you meet the word again in the sentence you heard.

Where and when

A private note with the page title, the site and the moment (m:ss), and the page address without the part after ? or #.

Pause or play on

Two switches in the Lexpad menu, under Other video sites, both on at first: Click words in video subtitles and Pause while I point at subtitles⁠. Turn off only the pause and the video keeps playing while you point; a click still opens the card. The small ⋯ at the end of a subtitle line turns Lexpad off on that site.

Privacy

  • While you only 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.
  • On video sites, the subtitle line and the page and moment are saved with a word only when you add it.
  • The video and the player are never changed: Lexpad reads the subtitle already on the screen.
  • It needs no extra permission for video sites. Read the privacy policy.

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

Which sites does it work on?

TED, lesson pages with an HTML5 video and subtitles, and common web video players, from the start; YouTube on its own page. Film and series services and some course sites start off, until you turn them on in the Lexpad menu. For another player, choose “Try subtitles on this site”.

Does the video pause on its own?

Only after your pointer rests on a subtitle, and it plays on when you move away or close the card. To keep it playing, turn off Pause while I point at subtitles in the Lexpad menu.

Does it translate the whole subtitle?

Lexpad explains the word you click, or the phrase you drag across, on a card above the line, in your notebook’s languages. The subtitle stays as the site shows it.

Which languages work?

Subtitles in any language the site shows. Japanese, Chinese and Korean too: click a word or drag across a few characters. The card is written in your notebook’s languages, from 81.

Is it free?

Yes. The extension is free on every plan and works with a free Lexpad account. Each meaning uses your AI allowance (25 AI cards a day (400 a month) on Free).

Can I turn it off on one site?

Yes. Click the small ⋯ at the end of a subtitle line and choose “Turn off on this site”, or use the switch under “This site” in the Lexpad menu.

Does it work on my phone?

The extension is for Chrome, Edge and Firefox on a computer. The words you save there are in your notebook on the web, in the Android app and in Lexpad for Mac and Windows.

Lexpad

Try it on the next video you watch.

Add the free extension, turn the subtitles on, and click the word you want to keep.

Available in the Chrome Web StoreGet it from Microsoft EdgeGet the add-on for Firefox

The extension is free and works with a free Lexpad account. After you add it, click Connect to Lexpad and sign in, or create your account. You never type a password into the extension.