TMXValidator

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.

Releases

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

Requirements

• Node.js 24.18.0 LTS or newer. Get it from https://nodejs.org/

Building

• Clone this repository.
• Run npm install to download and install NodeJS dependencies
• Run npm start to launch TMXValidator

 git clone https://github.com/maxprograms-com/TMXValidator.git
cd TMXValidator
npm install
npm start