CaptionGo – Bilingual Captions and Real-Time AI Captions for Any Video

Watch any video with captions in your language. CaptionGo translates the video's own captions into 100+ languages and shows them side by side. When a video has no captions, AI Captions turns the audio into captions in real time. Works on desktop and mobile browsers.

Chrome

+ Brave, Vivaldi, Arc

Edge

Firefox

Also on Android™

Search "CaptionGo" in the add-on store

Caption Sources

Translation Services

100+

Languages

AI Captions

La forma más rápida de entender cualquier video.

The quickest way to understand any video.

What is CaptionGo?

CaptionGo adds bilingual captions to videos on any website. It reads the video's own captions, translates them into your language, and shows the original and the translation together. No captions on the video? AI Captions turns the audio into captions in real time. Works on YouTube, Netflix, Coursera, Twitch, and thousands more sites, on both desktop and mobile.

Bilingual captions — see the original and your language together, for language learning and videos in another language
AI Captions — when a video has no captions, AI Captions turns the audio into captions in real time
Mobile fullscreen ready — a dedicated touch-friendly menu keeps captions visible and adjustable even in mobile fullscreen playback

Core Features

One extension for bilingual captions, AI Captions, and translation on web videos and in meetings.

Bilingual Captions on Any Video

Original and translation shown together, automatically across thousands of sites like YouTube, Netflix, and Coursera — perfect for language learning and foreign content.

PRO

Real-Time AI Captions

No captions? AI Captions turns video or page audio into captions in real time. Built-in quota and your own API key work with Deepgram, Soniox, xAI, and Alibaba Cloud Qwen, plus local Whisper. Soniox can also translate into another language as it recognizes speech.

PRO

AI-Powered Translation

Beyond Google and Bing: connect OpenAI, Claude, Gemini, DeepSeek, or local Ollama when you want translation that uses the surrounding context.

Works Almost Everywhere

CaptionGo can read captions from the network, the site, TextTrack, or the page itself. When none of those are available, AI Captions can generate them from the audio.

Mobile Fullscreen, Done Right

A touch-friendly drawer built for phone fullscreen. Tap the video to switch languages and toggle bilingual mode without ever leaving fullscreen.

PRO

Sync Across Devices

Your settings, API keys, and Caption Library are end-to-end encrypted and synced. Set them up once on your computer, then sign in on your phone.

Understand any video, in any language

Get more with CaptionGo Pro

Upgrade to CaptionGo Pro for AI Captions, preloaded translations, custom caption styling, and a floating window.

Free

Free/forever

Bilingual captions on web videos (translation shown with the original across thousands of sites)
Bilingual captions in meetings (Zoom, Microsoft Teams, Google Meet)
Built-in translation services (Google, Bing, browser AI)
Mobile fullscreen captions and keyboard shortcuts
17 interface languages, light / dark themes

PRO

$49.99

One-time Payment · Lifetime Access

Everything in Free, plus:
Preloaded captions that appear sooner, more complete full-sentence translations, and custom caption styling
Full caption style & position customization (font, size, color, background, stroke)
A floating window, and a searchable Caption Library with export (TXT, Markdown, SRT, VTT)
AI-powered translation (OpenAI, Claude, Gemini, DeepSeek, Ollama)
Built-in AI translation: 20000 requests, included once. Top up anytime, or use your own API key
Built-in AI Captions: 1200 minutes, included once. Top up anytime, or use your own API key
Cloud sync across devices (settings, API keys, and Caption Library, end-to-end encrypted)
Priority customer support

Upgrade to Pro

1-Year Plan

$19.99

One-time Payment · 1 Year Access · No Auto-renewal

1-year access, no auto-renewal. Includes 480 minutes of AI captions and 8000 AI translations.

Everything in Free, plus:
Preloaded captions that appear sooner, more complete full-sentence translations, and custom caption styling
Full caption style & position customization (font, size, color, background, stroke)
A floating window, and a searchable Caption Library with export (TXT, Markdown, SRT, VTT)
AI-powered translation (OpenAI, Claude, Gemini, DeepSeek, Ollama)
Built-in AI translation: 8000 requests with the 1-year plan. Unused quota expires when the plan ends. Top up anytime, or use your own API key
Built-in AI Captions: 480 minutes with the 1-year plan. Unused quota expires when the plan ends. Top up anytime, or use your own API key
Cloud sync across devices (settings, API keys, and Caption Library, end-to-end encrypted)
Priority customer support

Purchase 1-Year

Use Redeem Code

Feature Comparison

See what's included in Free and Pro

Feature

Free

PRO

Captions and translation

Bilingual captions on web videos

Bilingual captions in meetings (Zoom, Teams, Meet)

Built-in translation (Google, Bing, browser AI)

AI-powered translation (OpenAI, Claude, Gemini, etc.)

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Preloaded captions and more complete full-sentence translations

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Caption style & position customization

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Real-Time AI Captions

AI Captions from audio (built-in Deepgram, Soniox, xAI, Qwen, and local Whisper)

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Bilingual AI Captions (Soniox native real-time translation & live translation)

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Auto-start, Multi-region Endpoints & Bring Your Own API Key (BYOK)

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Sync & Support

Cloud sync across devices (settings, API keys, and Caption Library, end-to-end encrypted)

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Priority customer support

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7-day Pro trial (first sign-up)

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Captions and translation

Bilingual captions on web videos

Bilingual captions in meetings (Zoom, Teams, Meet)

Built-in translation (Google, Bing, browser AI)

AI-powered translation (OpenAI, Claude, Gemini, etc.)

Preloaded captions and more complete full-sentence translations

Caption style & position customization

Real-Time AI Captions

AI Captions from audio (built-in Deepgram, Soniox, xAI, Qwen, and local Whisper)

Bilingual AI Captions (Soniox native real-time translation & live translation)

Auto-start, Multi-region Endpoints & Bring Your Own API Key (BYOK)

Sync & Support

Cloud sync across devices (settings, API keys, and Caption Library, end-to-end encrypted)

Priority customer support

7-day Pro trial (first sign-up)

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Pricing FAQ

Have more questions? Contact us at [email protected]