100% Free & Open SourceJSON TranslationDocs TranslationLocal LLM

    Free AI Translator for JSON & Documentation.

    Translate your application content and markdown documentation instantly. No subscription required. Use your own API keys (OpenAI, Anthropic) or run locally for free with Ollama.

    See CLI commandsGet started for free
    Translate JSON & Docs
    Free CLI
    Translate JSON files & DocsCLI
    # Install CLInpm install -g intlayer-cli# Translate JSON / JS / TSnpx intlayer fill# Translate Markdown Docsnpx intlayer doc translate
    No monthly fees
    Multi-language
    Runs Locally
    BYO Keys
    OpenAI
    Claude
    Ollama
    Mistral
    DeepSeek
    OpenAI
    Claude
    Ollama
    Mistral
    DeepSeek

    Automate translation for JSON & Docs.

    Keep your UI consistent and your documentation accessible. Run these commands locally or in your CI pipeline, completely free with local models or your own API key.

    Translate JSON / JS
    Find missing keys in your locale files and fill them using AI.
    Translate JSON / JSCLI
    npx intlayer fill
    Translate Markdown
    Generate localized documentation files automatically.
    Translate MarkdownCLI
    npx intlayer doc translate
    Review Translations
    Interactive CLI to approve or reject AI-generated content.
    Review TranslationsCLI
    npx intlayer doc review

    The best free tool to translate apps & docs.

    Stop paying for expensive translation subscriptions. Intlayer is an open-source automation pipeline that gives you control over your i18n process.

    100% Free & No Subscription
    We do not mark up AI costs. Use your own API keys or local models. No credit card required.
    Translates JSON & Markdown
    Perfect for UI locales (JSON/TS) and documentation files (MD/MDX). Preserves code structure.
    Smart Context Chunking
    Splits large documentation files into safe chunks so you never exceed the model context window.
    Context-Aware Accuracy
    Inject application-level context for consistent terminology across your entire app.
    Audits Existing Translations
    Detects missing keys or untranslated content. It only fills what's missing to save tokens.
    Git-Integrated Workflow
    Run translation only on modified files (git diff). ideal for CI/CD pipelines.

    Run locally for free, or scale with Intlayer Cloud.

    We provide a flexible architecture. Run the translation pipeline on your own machine for zero cost, or use our server for team collaboration.

    Local Execution (Free)
    Run the CLI on your machine. Bring your own keys (OpenAI, etc.) or use Ollama for free offline translation.
    No subscription fees
    100% Privacy & Control
    Unlimited usage
    Intlayer Server (Optional)
    Centralize provider configuration and run translations from a shared environment/CMS.
    Shared API configuration
    Visual Editor
    CMS features

    How it works under the hood

    A provider-agnostic pipeline designed for structured content and predictable results.

    1

    Detect

    Find missing locales, structural mismatches, and type issues.

    2

    Chunk

    Split content safely for the model context window.

    3

    Translate / Review

    Apply context, retry on format mismatch, keep existing keys.

    4

    Write back

    Update files deterministically and keep diffs clean.

    Code-Based i18n

    Type-safe translations that live in your repo.

    Declare content alongside your components in TypeScript or JavaScript. Intlayer generates types automatically, giving you autocompletion, validation, and instant feedback. No more missing keys, context switching, or broken implementations.

    Start Coding
    AI CLI Tool

    Automate translations from your terminal.

    The CLI to audit, fill, and translate JSON & Markdown with AI.

    Run `npx intlayer fill` to detect missing keys and generate translations using OpenAI, Claude, or local models. Keep your Git history clean and your types safe.

    Try the CLI
    Intlayer TMS

    Stop paying per word. Automate with AI.

    The open-source alternative to Crowdin & Lokalise. Built for modern developer workflows.

    Manage translations directly in your code or via the visual editor. Leverage AI to translate instantly. Collaborate with your team without seat limits.

    See TMS
    Headless CMS

    Bridge your local code with remote content.

    Manage multilingual content with zero overhead. Intlayer allows you to interconnect local dictionaries with remote management, enabling Live Sync for hot updates without rebuilding. Use webhooks for CI/CD, manage feature flags, and let the Auto-Translation AI (WIP) handle the rest.

    See CMS
    Feature Flags

    Toggle features instantly. No deploy required.

    Intlayer dictionaries are more than just text. Use them to declare logic, styles, and configuration objects. With Live Sync, you can toggle features on or off, change UI themes, and update app behavior in real-time directly from the CMS.

    Try Features
    AB testing

    Your Playground for Product Experiments.

    Be the first to explore Intlayer's new AI-driven A/B Testing beta, built to boost discoverability and guide smarter product decisions. Test anything in real time, from copy and design to entire features, and let the data show you what truly works.

    See A/B test

    Built by the Community

    Meet the amazing contributors who make Intlayer possible.

    Join usSee all contributors

    Start translating your content for free.

    Open source. No credit card required. No recurring subscriptions. Install the CLI and start translating JSON and Markdown in minutes.

    Explore CLI commandsRead the documentation
    Quick startCLI
    npm install -g intlayer-cli# translate docsnpx intlayer doc translate --base-locale en --locales fr es# translate jsonnpx intlayer fill