INTERLINE · OPEN-SOURCE BILINGUAL READING

Read beyond language.
Keep the original.

Translations that follow your reading. Words that travel further.
From an article to a reply, stay on the page you’re already on.

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Free & open source · No account · Chrome 116+

Explore Interline

Actual Interline interface with French paragraphs and their English translations

Original and translation, togetherStart without an API keyYour choice of AI model

01 / READ · UNDERSTAND · REPLY

A little closer to understanding.

Follow your curiosity, from reading a page to writing a reply.

01Read bilingually 02Understand a sentence 03Write in place

See the translation. Keep the meaning in sight.

Read the original and translation side by side, paragraph by paragraph. Switch between bilingual, translation-only, and original-only views.

Alt + TStart translating a webpage

Make sense of the sentence that stops you.

Select text to read, copy, or listen to a translation. Supported AI engines can also provide vocabulary notes.

Select textClick the translation icon

Actual Interline selection translation card on a webpage — Actual extension screenshots · Sample content for demonstration

Think in your language. Reply in another.

Write a draft, then press Space three times to translate it in place. Set separate reading and writing languages, with a temporary undo option.

Space × 3Translate a draft in an input field

Actual Interline input translation with the translated draft and undo control — Actual extension screenshots · Sample content for demonstration

02 / YOUR CHOICE

Ready to read.
Room to make it yours.

Start with the built-in engine. Connect your own AI service when you want more control.

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GOOGLE TRANSLATE

Ready out of the box

Built-in Google Translate needs no API key. Open an article and start reading.

BRING YOUR OWN KEY

Bring your own AI

Connect your API key and customize prompts, translation styles, and glossaries for the words you work with.

OpenAIAnthropicGeminiOpenRouter

Also supports OpenAI / Anthropic-compatible services, including local services such as Ollama when configured appropriately.

Built-in online translation depends on network and provider availability. AI providers may charge API fees. Quality depends on your model and configuration.

03 / OPEN & TRANSPARENT

Your reading. In your hands.

MIT licensed. Fully open.

Inspect the source, build it yourself, adapt it, or contribute an improvement.

No account needed

No behavioral analytics or telemetry. Settings and API keys stay in your local browser storage.

Direct to your provider

No Interline translation relay server. Text goes directly to the translation provider you choose.

See how data is handled

BEFORE YOU BEGIN

A few things to know

Is Interline free?

Interline’s code is free under the MIT license. Built-in Google Translate needs no API key. If you connect an AI service, your provider may charge for API usage.

How do I get started?

Install from the Chrome Web Store, open an article, then use the floating translation control, right-click menu, or Alt+T. Click Interline in your browser toolbar to choose your reading language and engine.

Does it work on every webpage?

Interline supports Chrome 116 and later. Restricted pages such as chrome:// cannot use in-page translation. Site layouts and editors vary, so compatibility is not guaranteed everywhere. Please report issues on GitHub.

Where does my page content go?

Translation requests go directly from your browser to your chosen provider, including Google for the built-in engine. AI features may include the page title, nearby text, and glossary entries as context. Enabling whole-page context also sends the first 8,000 characters of page text. Providers have their own data policies; see the privacy policy for details.

Can I change how translations look?

Yes. Choose from three reading views, 10 translation styles, and light or dark appearance. You can also set automatic translation rules per site and export or import settings. Exported settings JSON includes API keys, so keep it private.

INTERLINE · 行间

Your next great read.
A little less out of reach.

Install Interline. Open the page you’ve been meaning to read.

Add to Chrome