Check the validity of your TMX documents on Windows, Linux or macOS with TMXValidator.
Most CAT (Computer Aided Translation) tools rely on TMX (Translation Memory eXchange) standard to exchange translation memory data. Unfortunately, some tools produce files that are not valid and others do not accept correctly formatted TMX documents.
TMXValidator validates your documents against the TMX DTD and also verifies that they comply with the requirements described in the TMX specifications.
TMXValidator supports TMX versions 1.1, 1.2, 1.3 and 1.4.
The source code of TMXValidator was originally published on SourceForge at https://sourceforge.net/p/tmxvalidator/code. The original version was written in Java and loaded the TMX file into memory for validation, limiting support for very large files.
TMXValidator has since been rewritten entirely in TypeScript. It uses a SAX-based streaming parser with full support for DTD validation (TypesXML) and has no file size limitation.
| Version | Comment | Release Date |
|---|---|---|
| 3.1.0 | Updated dependencies | August 12, 2026 |
| 3.0.0 | Rewritten entirely in TypeScript and removed Java code | April 6, 2026 |
| 2.8.0 | Added Spanish and French localization | August 3, 2025 |
| 2.7.0 | Added support for huge files | March 22, 2024 |
| 2.6.0 | Tighter checking of "x" and "i" attributes and language codes | July 4, 2023 |
| 2.5.0 | Updated code and libraries | May 22, 2023 |
| 2.4.0 | Updated libraries | December 8, 2022 |
| 2.3.0 | Updated code and libraries | February 17, 2022 |
| 2.2.0 | Updated libraries and TypeScript code | January 2, 2021 |
| 2.1.0 | Added UI written in TypeScript and improved validation | February 5, 2020 |
| 2.0.2 | Switched to ant for building and updated OpenXLIFF | August 8, 2019 |
| 2.0.1 | Fixed date validation and updated libraries | June 24, 2019 |
| 2.0.0 | New version that supports validation of very large files | November 28, 2018 |
Ready to use installers are available at https://www.maxprograms.com/products/tmxvalidator.html
- Node.js 24.18.0 LTS or newer. Get it from https://nodejs.org/
- Clone this repository.
- Run
npm installto download and install NodeJS dependencies - Run
npm startto launch TMXValidator
git clone https://github.com/maxprograms-com/TMXValidator.git
cd TMXValidator
npm install
npm start