Compare
Read Frog vs Immersive Translate
Both turn web pages and YouTube subtitles into side-by-side bilingual text. Read Frog is open source, translates selections for free, breaks down words and long sentences with AI and turns them into flashcards, from $3 a month.
Last updated November 3, 2026
Both put a translation beside every paragraph and subtitle, and in Read Frog that part is free: whole-page bilingual translation with the surrounding text as context, selection translation included. Then it keeps going: look a word up, break a long sentence down, and review what you save as flashcards. Open source; Pro is $3 a month.
Bilingual web pages and videos
Read web pages and YouTube subtitles with the translation beside the original, and see a translation as soon as you select a sentence. These basics are free with the Google or Microsoft translator, or bring your own OpenAI, DeepSeek, Gemini or local model.
Feature comparison
 Read Frog | Immersive Translate | |
|---|---|---|
| Bilingual web page translation | ✓ | ✓ |
| Dual YouTube subtitles | ✓ | ✓ |
| AI transcription for videos without subtitles | ✓ | ✓ |
| PDF translation that keeps the layout | ✓ | ✓ |
| Selection translation | ✓free | ✓paid plan |
| Context-aware translation | ✓free | ✓paid plan |
| Custom AI Actions, such as word lookup or Sentence Analysis | ✓ | Not in its feature list |
| Your own API key, or local models like Ollama | ✓ | ✓ |
| Save words to a notebook and review them as FSRS flashcards | ✓ | Not in its feature list |
| Open source | ✓GPL-3.0 | No |
| Browsers | Chrome, Edge, Firefox | Chrome, Edge, Firefox, Safari |
Immersive Translate's details come from its website, its GitHub README, its App Store listing and hands-on use, checked in October 2026.
What Read Frog adds
From reading to remembering
Immersive Translate is done once the page is translated. Read Frog keeps going:
- Select a word or sentence on a page or in a video's subtitles and run an AI Action to look it up or break down a long sentence.
- Save the result to Notebase in one click, together with the sentence it came from.
- Add a card template to the notebase and your notes become flashcards; FSRS schedules each review by how well you remember the card.
Immersive Translate's own comparison concedes that vocabulary learning is better served by dedicated tools (see its comparison with Saladict). Read Frog builds that tool into the translator.
Open source, and your keys stay with you
Public code
Read Frog's code is public on GitHub, so anyone can check what it does to a page.
Settings stay local
Your API keys and settings stay in your browser and are never uploaded unless you turn on sync. See the privacy policy.
Pricing
| Read Frog | Immersive Translate | |
|---|---|---|
| Free plan | ✓ | ✓ |
| Entry paid plan | Pro: $3 a month, or $30 a year | Pro: $9.99 a month, or $79.99 a year |
| Top plan | Ultra: $7 a month, or $70 a year | Max: $34.99 a month, or $289.99 a year |
Immersive Translate's prices are from the App Store and may differ on its website and by region. See what each Read Frog plan includes on the pricing page.
Who each one is for
Switching from Immersive Translate
- 1
Install Read Frog
Follow the installation guide. With both extensions on, a paragraph can get translated twice, so turn on page translation in only one of them.
- 2
Bring your model
Add the model you already use, such as OpenAI, DeepSeek, Gemini or Ollama, as described in Set Up Providers and API Keys, or start with the free Google or Microsoft translator.
- 3
Match your layout
Set up the bilingual layout you are used to with Custom Translation Styles.
What users say
I've completely switched from Immersive Translate to Read Frog. Hooked it up to ds v4-flash for translation — fast, accurate, and stable.
I finally finished switching my immersive translation setup over: Read Frog + DeepSeek V4 Flash.
It doesn't just do immersive translation — it also gives AI companion explanations word by word, sentence by sentence. Language learning effortlessly reaches the next level.
Frequently Asked Questions
If you have more questions, please contact us.
Web page translation, selection translation, YouTube subtitle translation, AI dictionary lookups and bringing your own API key are all free. The free plan keeps 10 notes and limits flashcard review; from Pro, notes and reviews are unlimited, with 300 minutes of AI video subtitles a month.
Yes. Turn on page translation in only one of them per site so text isn't translated twice.
Yes. The key comes from your model provider, so add it to Read Frog as described in Set Up Providers and API Keys.
Mainstream models such as OpenAI, DeepSeek, Gemini and Claude, local models through Ollama or LM Studio, and any service with an OpenAI-compatible API. Without AI, you can use Google, Microsoft or DeepL. See Set Up Providers and API Keys for the full list.