Dual Subtitles for Netflix
Read Frog shows Netflix subtitles in two languages at once, the original line and its translation in sync, from a button in Netflix's own player. Click a word in the subtitles to look it up and save it for review.
Last updated November 1, 2026
Two languages on every line
With Read Frog installed, start a show or film on Netflix and click the Read Frog button in the player's control bar. The subtitles become bilingual: the original line and its translation stacked together, in sync with the episode.
- The button sits in Netflix's own control bar. Move the pointer over the player to bring it up.
- Turn on Translate on open for Netflix and every title starts translating as soon as it plays. YouTube, X and Netflix each have their own switch.
- Go on to the next episode without reloading the page, and its subtitles load on their own.
Built on Netflix's own subtitles
Read Frog translates one of the subtitle tracks Netflix already has for the title.
Subtitles the way you like them
Layout
Show the original only, the translation only, or both, with the translation above or below the original.
Style and position
Adjust the font, size, colors and background opacity, and drag the subtitles anywhere on the player. The same settings apply on YouTube and X. For effects beyond the controls, such as blurring the translation until you have heard the line, write CSS with Custom Subtitle Styles.
Downloads
Download the original or the translated subtitles.
Learn while you watch
Click a word in the subtitles and AI explains what it means in that line, with the Dictionary action or one of your own. Save it to Notebase in one click. Add a card template to the notebase and your notes become flashcards that FSRS schedules for review, so every episode adds to a vocabulary list of your own.
Your choice of translation service
Video subtitles have their own translation service, prompt and request rate, separate from page translation. Use the free Google or Microsoft translator, connect an LLM such as OpenAI, DeepSeek or Gemini, or run a local model with Ollama. See Set Up Providers and API Keys.
The same subtitles on YouTube and X
The button and your subtitle style carry over to captioned videos on X and on YouTube, where AI can also transcribe videos that have no captions at all.
Getting started
- 1
Install Read Frog
Follow the installation guide.
- 2
Play a title on Netflix
Start a show or film so the address is
netflix.com/watch/…, then click the Read Frog button in the player's control bar. - 3
Make it yours
Adjust the display and style in Video Subtitles.
Frequently Asked Questions
If you have more questions, please contact us.
Yes. Translating Netflix subtitles with the free Google or Microsoft translator costs nothing, and you can also use your own LLM key or a local model. You watch with your own Netflix account.
Any text subtitle track Netflix offers for the title, into the language you set in Read Frog. A title with no subtitle track, or only image-based ones, can't be translated.
It works on netflix.com in Chrome, Edge and Firefox. Netflix's own apps don't run browser extensions.
Start playing a title so the address is netflix.com/watch/…, then move the pointer over the player to bring up its control bar. If the button is still missing, check that Enable video subtitles is on in the Video Subtitles settings and reload the page.
Yes. Turn subtitles on in only one of them, so a show isn't subtitled twice.