About
Locize is a developer-first localization platform designed to eliminate the friction between engineering teams and translators. Built by the creators of i18next, it serves as the native translation backend for i18next while also supporting any i18n library or workflow through its flexible CLI, API, and SDK integrations. Developers sync source strings and missing keys directly from their codebase or CI/CD pipelines, removing the need for manual JSON file management. Translators and reviewers then work inside a dedicated web UI equipped with an AI-assisted CAT (Computer-Assisted Translation) tool, an In-Context Editor for translating within the live app, glossary management, and multi-step review workflows with QA checks. Translation updates are served at runtime via a global CDN or API, meaning you can ship localization changes without triggering a full application redeploy. This continuous delivery model dramatically reduces release risk and keeps global products up to date in real time. Locize integrates with React, Vue, Angular, Next.js, Node.js, iOS, Android, Figma, PHP, Python, Java, .NET, and more. Engineering managers benefit from usage-based cost control, project health metrics, versioned delivery, and role-based access controls. A free plan is available after the no-credit-card free trial, making it accessible for startups and growing teams. Locize is operated by a Swiss company, offering strong data privacy standards.
Key Features
- Native i18next Integration & CLI/CI Sync: Push new translation keys and source strings directly from your codebase or CI/CD pipeline via the CLI, eliminating manual JSON file management entirely.
- AI-Assisted Translation: Auto-translate strings using AI and machine translation engines, then allow translators to review, correct, and publish — accelerating time-to-market for global releases.
- CDN/API Runtime Delivery: Serve live translation updates through a global CDN or REST API so localization changes reach users instantly without requiring a full application redeploy.
- Dedicated Translator UI with In-Context Editor: Translators work in a purpose-built interface with role-based review steps, QA checks, glossary management, and an In-Context Editor that shows translations inside the live app.
- Multi-Framework & Multi-Platform Integrations: Supports React, Vue, Angular, Next.js, Node.js, iOS, Android, Figma, PHP, Python, Java, .NET, and more — making it a universal source of truth for all your translation assets.
Use Cases
- Shipping a multilingual SaaS product continuously by syncing translation keys from CI/CD and delivering updates via CDN without blocking engineering releases.
- Bridging the workflow gap between developers who manage i18n keys in code and translators who need a dedicated UI with review steps and quality checks.
- Localizing a React or Next.js web application into multiple languages using i18next, with AI pre-translation and an In-Context Editor for translator accuracy.
- Managing localization for iOS and Android mobile apps with a single source-of-truth platform that integrates with mobile SDKs and supports versioned delivery.
- Reducing localization costs and release risk for an engineering team by automating key sync, enabling role-based review workflows, and gaining visibility into project health metrics.
Pros
- Built by i18next Creators: Deep, first-party integration with i18next means the platform is purpose-built for the most widely used JavaScript i18n library, reducing setup friction significantly.
- Ship Translations Without Redeploying: CDN/API delivery decouples localization updates from your release cycle, allowing instant global updates independent of engineering deployments.
- Free Plan Available: A no-credit-card free trial and a permanent free tier make Locize accessible for solo developers, startups, and small teams exploring continuous localization.
- Swiss Privacy & Data Standards: Operated by a Swiss company, Locize adheres to strong European data privacy standards, a key consideration for enterprise and regulated-industry customers.
Cons
- Optimized Primarily for i18next: While it supports other i18n libraries, the tightest and most feature-rich experience is tailored to i18next users, which may require additional setup for other frameworks.
- Usage-Based Pricing Can Scale Quickly: Costs are tied to translation volume and active users, so large projects with many languages or frequent updates can accumulate significant expenses over time.
- Learning Curve for Non-Developer Stakeholders: The workflow model — keys, namespaces, versions, CDN delivery — can be unfamiliar to non-technical translators and localization managers coming from traditional TMS tools.
Frequently Asked Questions
What is Locize and how does it differ from a traditional TMS?
Locize is a continuous localization platform that integrates directly with your codebase via CLI/API. Unlike traditional Translation Management Systems, it delivers updates at runtime via CDN so your app stays in sync with translations without redeploys, and it keeps developers fully in control through code and CI/CD pipelines.
Do I have to use i18next to use Locize?
No. While Locize was built by the i18next team and offers the deepest integration for i18next projects, it works with any i18n library or workflow through its REST API, CLI, and SDK connectors for frameworks like React, Vue, Angular, Next.js, and mobile platforms.
How are translation updates delivered to my app?
Translations are served at runtime via a global CDN or directly through the Locize REST API. This means you can publish new or updated translations and users will receive them on the next app load — no new build or deployment required.
Is there a free plan available?
Yes. Locize offers a free trial that requires no credit card, and a free plan remains available after the trial period ends. This makes it suitable for individual developers and small teams getting started with continuous localization.
Does Locize support AI or machine translation?
Yes. Locize includes AI-assisted translation features within its CAT tool, and supports machine translation pre-translation workflows. Translators can review and correct AI-generated translations before publishing, and an MCP integration allows connecting AI assistants directly to the platform.
