# BrowserTranslate vs InterSub

BrowserTranslate records 0 monthly visits with — month-over-month growth and Paid pricing. InterSub records 71,644 monthly visits with -11.2% growth and Freemium, Free Trial pricing.

| Metric | [BrowserTranslate](https://openaitools.app/tool/browsertranslate) | [InterSub](https://openaitools.app/tool/intersub) |
| :--- | :--- | :--- |
| Website URL | https://chromewebstore.google.com/detail/browsertranslate/lgciihodaaahmecbbcggahpjcgnhkdpf | https://intersub.cc |
| Categories | AI Language Learning, AI Translate, AI Browsers, AI API | AI Language Learning, AI Translate, AI Subtitle Generator |
| Pricing Model | Paid | Freemium, Free Trial |
| Monthly Visits | 0 | 71,644 |
| MoM Growth Rate | — | -11.2% |
| Primary Market | Global | United States |
| Direct Visits | 0 | 31,959 |
| Review Score | 4.2 | 4.2 |
| Saved Count | 0 | 2 |
| Supported Platforms | Browser Extension | Website |

## BrowserTranslate

BrowserTranslate is a Chrome browser extension built for people who want to learn languages from the real content they read every day rather than from a textbook. Instead of replacing a paragraph with a flat machine translation, it asks ChatGPT to dissect the highlighted passage: you get the translation, the individual vocabulary items, romanization for non-Latin scripts, and commentary on grammar, syntax and levels of formality. That combination is what separates it from ordinary page translators, which usually stop at a single output sentence.

The workflow is deliberately minimal. After installing the extension you connect your own ChatGPT/OpenAI account, then browse normally. Whenever you meet text in a target language, you select it, press the button that appears, and read the explanation in a popup without leaving the page. The developer advertises support for more than 100 languages, ranging from major European, African and Asian languages to closely related dialects such as Mandarin, Cantonese, Hokkien, Hakka, Shanghainese and Taiwanese, or Egyptian, Lebanese, Saudi and Moroccan Arabic.

Pricing is a single one-time payment (listed at $9.99 at the time of writing) for lifetime access to the extension. Note that the extension itself is only half of the setup: because it calls ChatGPT on your behalf, you must supply your own OpenAI API key, and API usage is billed separately by OpenAI according to your own consumption. That makes the total cost depend on how heavily you use it.

**Pricing & Plans:** One-time purchase of $9.99 for indefinite access (as listed in the Chrome Web Store). A ChatGPT/OpenAI account and your own API key are required; OpenAI API usage is billed separately by OpenAI.

- **Highlight-to-explain popup:** Select any passage on a page, click the translate button that appears, and read an AI explanation in an overlay without navigating away.
- **Beyond translation:** Every request returns translations, vocabulary, romanization for non-Latin scripts, plus grammar, syntax and formality breakdowns.
- **100+ languages and dialects:** Covers major world languages and closely related variants, including multiple Chinese and Arabic dialects, Spanish, Italian, Russian, Japanese and Farsi.
- **Bring your own ChatGPT key:** Connects to your own OpenAI account, so you control the model and are billed directly by OpenAI for what you use.
- **Lightweight extension:** A small Chrome package (about 40 KB) with no data collection declared by the developer and in-app purchase for licensing.

**Strengths:** Goes well beyond literal translation with grammar, syntax and formality analysis; Romanization support makes non-Latin scripts approachable for beginners; Cheap one-time price compared with recurring subscription translation tools; Works inline on any page, so learning happens in context rather than in a separate app

**Limitations:** Requires your own ChatGPT/OpenAI API key, so OpenAI usage is an extra, usage-based cost; Total spend depends on your API consumption, which is harder to predict than a flat fee; Small user base and a single published version, so community support and update history are limited; The developer's standalone website has a TLS configuration problem, so the Chrome Web Store page is the most reliable source of information

[Profile (Markdown)](https://openaitools.app/tool/browsertranslate.md)

## InterSub

InterSub takes the idea of immersion learning and puts it inside the shows you already watch. It is a browser extension for Chrome, Edge, and Firefox that layers two subtitle tracks over the video player: one in the language you are learning and one in your native language. Instead of switching between a video and a dictionary tab, the explanation appears exactly where the problem is.

Hovering over any subtitle word pauses the video and opens a pop-up with an AI-generated definition and a context translation of the words around it. Every lookup is saved to a personal Wordbook together with the sentence it came from, so vocabulary review is built from real scenes rather than generic word lists. The extension also includes an AI Language Buddy tutor that can explain meaning, grammar, and cultural references, and AI subtitle translation for episodes that have no subtitles in your language.

InterSub works across Netflix, YouTube, Prime Video, HBO Max, Crunchyroll, TED, Coursera, Udemy, LinkedIn Learning, Bilibili.tv, and several other platforms, with dozens of language pairs. It also handles study mechanics: a pause-only subtitle mode trains listening, shadowing mode stops after each line so you can repeat it aloud, and a Telegram bot runs spaced-repetition drills on your saved words with Anki sync as an alternative. Dual subtitles themselves are free, with lookups limited each month on the free plan.

**Pricing & Plans:** Free to start with dual subtitles included. The free plan allows a limited number of word lookups each month; Pay-as-you-go and Premium plans add more lookups and unlock AI subtitle translation. Exact prices are listed on the site's plans page.

- **Dual subtitles in your two languages:** Watch with the subtitle of the language you are learning and your native language stacked, one line above the other, directly inside the video player.
- **Hover pop-up dictionary:** Hover any subtitle word and the video pauses while a pop-up shows an AI-generated definition plus a translation of the surrounding context.
- **Self-filling vocabulary builder:** Every word you look up lands in your Wordbook with its original context, so you build a personal list from scenes you actually watched.
- **AI subtitle translation:** If an episode has no subtitles in your language, InterSub translates them on the fly with AI and shows the translation as the second line.
- **AI Language Buddy tutor:** Ask a ChatGPT-powered tutor what a word means in this scene, why the grammar works that way, or what a cultural reference is about.

**Strengths:** Dual subtitles and hover lookups happen inside the player, so you never leave the episode; Vocabulary is captured automatically with the sentence it came from; Supports dozens of language pairs across streaming, learning, and anime platforms; Extra study tools like pause-only subtitles, shadowing mode, a Telegram bot, and Anki sync

**Limitations:** Desktop browser extension only, with no full mobile app; Word lookups are capped each month on the free plan; Requires an internet connection for translations and subtitle synchronization

[Profile (Markdown)](https://openaitools.app/tool/intersub.md)

## Frequently Asked Questions

### How do BrowserTranslate and InterSub compare in monthly traffic?

BrowserTranslate has 0 monthly visits, while InterSub has 71,644. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

BrowserTranslate has a month-over-month growth rate of —; InterSub has -11.2%.

### How does pricing compare?

BrowserTranslate: Paid. One-time purchase of $9.99 for indefinite access (as listed in the Chrome Web Store). A ChatGPT/OpenAI account and your own API key are required; OpenAI API usage is billed separately by OpenAI. InterSub: Freemium, Free Trial. Free to start with dual subtitles included. The free plan allows a limited number of word lookups each month; Pay-as-you-go and Premium plans add more lookups and unlock AI subtitle translation. Exact prices are listed on the site's plans page.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Sider](https://openaitools.app/tool/sider) | 2,644,740 | -10.6% | Freemium | AI sidebar and browser agent for reading, writing and research | [.md](https://openaitools.app/tool/sider.md) |
| 2 | [Immersive Translate](https://openaitools.app/tool/immersive-translate) | 2,392,414 | -9.4% | Freemium, Free Trial | Bilingual AI translation for websites, documents, video and images | [.md](https://openaitools.app/tool/immersive-translate.md) |
| 3 | [Language Reactor](https://openaitools.app/tool/language-reactor) | 1,878,769 | +0.6% | Freemium | Learn languages from Netflix, YouTube, and real-world texts with dual subtitles and AI | [.md](https://openaitools.app/tool/language-reactor.md) |
| 4 | [Trancy](https://openaitools.app/tool/trancy) | 438,752 | -57.6% | Freemium, Free Trial | An AI language learning assistant with bilingual subtitles, immersive translation, and vocabulary practice | [.md](https://openaitools.app/tool/trancy.md) |
| 5 | [Lufe AI Translator](https://openaitools.app/tool/lufe-ai-translator) | 104,655 | -3.5% | Freemium | AI bilingual translator for web pages, PDFs, and images | [.md](https://openaitools.app/tool/lufe-ai-translator.md) |
| 6 | [DeepTranslate](https://openaitools.app/tool/deeptranslate-%E5%85%A8%E9%A1%B5-%E5%8F%8C%E8%AF%AD%E9%A1%B5%E9%9D%A2%E7%BF%BB%E8%AF%91%E5%99%A8) | 90,017 | -22.9% | Free | Free bilingual browser extension that translates any page with the AI engine you choose | [.md](https://openaitools.app/tool/deeptranslate-%E5%85%A8%E9%A1%B5-%E5%8F%8C%E8%AF%AD%E9%A1%B5%E9%9D%A2%E7%BF%BB%E8%AF%91%E5%99%A8.md) |
| 7 | [AutoDub](https://openaitools.app/tool/autodub) | 65,653 | +21% | Free | AI dubbing and bilingual subtitles for any YouTube video | [.md](https://openaitools.app/tool/autodub.md) |
| 8 | [Ddict](https://openaitools.app/tool/ddict) | 32,146 | +2.4% | Freemium | Browser translation, dictionary, and AI writing assistant | [.md](https://openaitools.app/tool/ddict.md) |
| 9 | [BiRead](https://openaitools.app/tool/biread) | 13,656 | -15.8% | Freemium | Turn any webpage into bilingual reading in one click | [.md](https://openaitools.app/tool/biread.md) |
| 10 | [BiRead - Bilingual Subtitles](https://openaitools.app/tool/biread-bilingual-subtitles) | 13,656 | -15.8% | Freemium | Bilingual subtitles and translated pages wherever you read or watch | [.md](https://openaitools.app/tool/biread-bilingual-subtitles.md) |

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Source: https://openaitools.app/compare/browsertranslate-vs-intersub

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