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Translate Toolkit

Free plan APILinuxWindows

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Translate Toolkit's own site

What Translate Toolkit is

Translate Toolkit is a free localization toolkit that provides command-line utilities and a Python library. It converts among formats including PO, XLIFF, Android resources, Fluent, Qt TS, Markdown and JSON. Quality checks cover more than 42 possible problems, including missing variables, accelerator keys, escaping, capitalization and XML, while accounting for language conventions such as quotation marks and punctuation. Terminology tools can identify conflicting translations and extract messages with text or regular expressions, including terms affected by glossary changes. The Python API supplies functions, classes and methods for building localization tools programmatically. Its documentation serves both users of the included tools and developers creating new tools. The project site says current support is for Python 3.11 and newer, and installation guidance documents Windows plus packaged installations for several Linux distributions. Translate Toolkit is licensed under GPL-2.0-or-later. Development is currently driven by the Weblate project. Users can consult the issue tracker, contribution guide and vulnerability-reporting link for project support and contributions.

Who it suits

It suits localization users who need file conversion or quality checks, and developers building Python-based translation tools. Windows and supported Linux users can follow the documented installation routes.

What it does well

  • Free open-source localization toolkit
  • Converts many common localization formats
  • More than 42 quality checks
  • Includes command-line tools and Python API
  • Glossary and terminology utilities included

What to know first

  • Supports Python 3.11 and newer
  • GPL-2.0-or-later licensing applies
  • Some format and feature support is optional

Plans

PlanBilled and limitsPrice
Translate ToolkitOpen-source localization toolkit · optional extras add format and feature supportFree

As toolkit.translatehouse.org lists them, read 12 Oct 2026. The maker's own page has the final word.

Verdict

Translate Toolkit offers format conversion, extensive localization checks and programmable Python components at no listed cost. Its documented Python requirement and GPL licence matter when fitting it into an existing environment.

Facts from Translate Toolkit's own pages

API access
Yes · toolkit.translatehouse.org, 22 Sept 2026
Format conversion
It converts among localization formats including PO, XLIFF, Android resources, Fluent, Qt TS, Markdown, and JSON. · toolkit.translatehouse.org, 12 Oct 2026
Free plan
Yes · toolkit.translatehouse.org, 22 Sept 2026
Glossary tools
Yes · toolkit.translatehouse.org, 22 Sept 2026
Language awareness
Checks account for language conventions such as capitalization, quotation marks, and punctuation. · docs.translatehouse.org, 12 Oct 2026
License
Translate Toolkit is licensed under GPL-2.0-or-later. · toolkit.translatehouse.org, 12 Oct 2026
Maintenance
The project site says development is currently driven by the Weblate project and identifies Translate Toolkit as the actively maintained project in the Translate organization. · toolkit.translatehouse.org, 12 Oct 2026
Purpose
Translate Toolkit provides localization file conversion, quality checks, and automation through command-line tools and a Python library. · toolkit.translatehouse.org, 12 Oct 2026
Python API
The API provides functions, classes, and methods for programmatically building localization tools. · docs.translatehouse.org, 12 Oct 2026
Python requirement
The current project site says Translate Toolkit supports Python 3.11 and newer. · toolkit.translatehouse.org, 12 Oct 2026
Quality checks
Its checker includes more than 42 checks for issues such as missing variables, accelerator keys, escaping, capitalization, and XML. · docs.translatehouse.org, 12 Oct 2026
Support and contributions
The project directs users to its issue tracker and contribution guide and provides a link for reporting vulnerabilities. · toolkit.translatehouse.org, 12 Oct 2026
Supported audience
The documentation is for users of the included tools and developers building new tools with the toolkit. · docs.translatehouse.org, 12 Oct 2026
Supported environments
The installation guide documents Windows installation and packaged installs for several Linux distributions. · docs.translatehouse.org, 12 Oct 2026
Terminology
Tools can find conflicting translations and extract messages using text or regular expressions to locate terms affected by glossary changes. · docs.translatehouse.org, 12 Oct 2026

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