Tolgee
An open-source application localization platform that supports direct text modification within the application interface, AI translation and collaborative translation. It provides JS SDK, CLI and REST API, and the official website states that free registration is available.
Updated: 2026-10-26
What is Tolgee?
Tolgee is an open-source platform for application localization, and its official website calls itself "an open-source localization platform developers enjoy working with". Different from the common "export table - translate - import" process, it places the translation action back into the application interface itself, allowing developers and translators to collaborate in the same context. The official website states that it already has over 40,000 users and offers free registration and demo bookings.
Who is it for?
- Product teams looking to launch web or mobile applications to multilingual markets.
- Frontend engineers who are tired of "creating a development task for every copy change".
- Translators and localization managers who need to proofread translations in the real interface context.
- Technical teams that prefer an open-source platform they can self-audit or self-host.
Key features
6In-context translation
Directly select and modify copy on the application interface, adjust translations in a WYSIWYG manner, and developers no longer need to go back to the code to find keys one by one.
AI translation
Generates translations based on the context of the interface. According to the official website, because it can access the context, the AI translation results are more accurate than machine translation that is divorced from the scene.
Use Tolgee SDKs
Add keys, upload screenshots and translate directly within the app via the official JS SDK. The integration methods are detailed in the SDK documentation on the official website.
Import / export via CLI
Import and export language files using a command-line tool. It also supports import and export via the interface, and provides a complete REST API.
Collaboration and Dev tools
The official website lists translation workflows for team collaboration and developer tools, facilitating coordination between translators and the engineering team.
Supercharge with Apps & Integrations
The official website lists plugins and integrations with tools like Figma, covering common R&D and design workflows.
How to use Tolgee
- 1First, use the free registration on the official website to run through a small project and verify whether the SDK integration and translation delivery are smooth.
- 2When integrating the SDK, pay attention to the production environment keys and permissions, and do not expose write permissions to public pages.
- 3Do not fully rely on AI translations for key interface copy; it is recommended to manually review professional terminology and provide a glossary.
- 4Use version control for language files via the CLI to facilitate rollbacks and code reviews.
- 5Before commercial use, recheck the official pricing and open-source license notes, as the rules may be adjusted with version updates.
Traffic & popularity
Data month Sep 2026
Tolgee receives about 8.7K visits per month and ranks #3,028,335 worldwide.
Monthly visits
12 monthsTraffic sources
- Direct50.6%
- Search30.7%
- Referrals10.5%
- Social3.3%
- Display ads2.1%
- Other2.8%
Top countries
- Italy15.0%
- Spain11.5%
- United States10.4%
- Netherlands8.0%
- Germany6.3%
Estimated from third-party traffic data.
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