An open source developer-friendly localization platform with in-context translation editing, AI machine translation from DeepL, Google Translate, AWS, and Azure, translation memory, screenshot context generation, an MCP server for AI coding assistant integration, and free cloud hosting up to 500 keys with unlimited keys on self-hosted deployments.
Expert Video Review by SEOGANT · March 2026
Tolgee is an open source localization platform built for developers and translators who need to manage app translations efficiently. The platform's core philosophy is making translation management accessible within the development workflow rather than requiring a separate localization workflow disconnected from coding.
Tolgee integrates with web frameworks through its JavaScript SDK and with native mobile apps through iOS and Android SDKs, connecting the localization management layer directly to the application codebase.
In-context editing is Tolgee's most distinctive feature, allowing translators and developers to edit string translations directly within the running application rather than in a separate translation management interface.
By holding the ALT or Option key and clicking on any text element in the application, the user opens an editor for that specific translation string in its actual visual context.
This context-aware editing reduces translation errors caused by strings being too short, too long, or tonally wrong for the actual UI position where they appear.
Machine translation integration connects Tolgee to DeepL, Google Translate, AWS Translate, Azure, and Tolgee's own AI Translator in a unified interface.
Translators can get suggestions from all connected providers simultaneously and configure which provider to use per language, allowing optimization for translation quality in specific language pairs where one provider outperforms others.
Translation memory automatically suggests translations based on previously approved translations within the project, including a similarity percentage and the original text context, accelerating work on new strings that are similar to previously translated content.
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