OmegaT the free translation memory tool

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OmegaT is a free translation memory application that works on Windows, macOS, Linux... It is a tool intended for professional translators. It does not translate for you! (Software that does this is called "machine translation", and you will have to look elsewhere for it.)

Professional features

Fuzzy matching
Match propagation
Simultaneous processing of multiple-file projects
Simultaneous use of multiple translation memories
User glossaries with recognition of inflected forms

Work with more than 30 file formats

Microsoft Word, Excel, Power
XHTML and HTML
Open Document Format (LibreOffice, OpenOffice.org)
MediaWiki (Wikipedia)
Plain text
...and around 30 other file formats

Powerful tools

Unicode (UTF-8) support: can be used with non-Latin alphabets
Support for right-to-left languages
Integral spelling checker
Compatible with other translation memory applications (TMX, TTX, TXML, XLIFF, SDLXLIFF)
Interface to Google Translate

Download

OmegaT is available in many different versions in order to suit a range of user requirements.

To find the version most suitable for you, follow the link below to the Download Selector.

Alternatively, if you already know which version you wish to download, click on the button to have an overview of the different OmegaT versions available.

Download Selector

Download Overview

OmegaT 4.3.3 Standard Version
OmegaT 5.7.1 Latest Version

The perfect companion for those of us who don't need complexity but efficiency; glossaries, auto-complete and automatic translation makes my work in literary translation so much more efficient
Diego Merino - Translator EN > ES

ODFAuthors and LibreOffice's Italian translators are proud to use such a good tool for their hard work within the LibreOffice Community.
Valter Mura - Translator EN > IT

I've been using OmegaT as a professional translator for over 10 years, benefiting in the early days from its ease of use and extremely helpful forum. A vast range of functions, an uncluttered interface, and, most importantly, constant, regular open-source development!
Robert Corner, Institut Laue-Langevin, France

The OmegaT project and you

OmegaT isn't just a product; it's an exciting project, and you can be part of it.

OmegaT is free software. That means that users like you are free to download and use it with very little in the way of restrictions. You are also free to copy it and pass it on to other people.

OmegaT is open-source software. That means that if you feel so inclined, you may modify OmegaT to suit your own requirements. For advocates of open-source software, this freedom is even more important than the exemption from having to pay anything.

The OmegaT project would benefit from greater support from volunteers in almost all areas. Although many users are aware of this, their reaction is often "But I can't program!". Programming is certainly the most important function, and without programming, there is no program. But programming isn't the only job needing to be done. Below is a list of areas for which further volunteers would be more than welcome!

Documentation authoring

Documentation is very important. Many of you reading this will be translators who have translated a lot of user documentation. Have you considered writing some user documentation yourself? It's a real eye-opener!

Localization

Thanks to the work of translators in the past, OmegaT's user interface and/or Help texts have been translated into several languages. That means there are only a few thousand left! Localizing OmegaT into other languages is also an ongoing task, since new features and functions are being added all the time. Please contact the OmegaT Localization Co-ordinator for details of what is involved in localizing/translating OmegaT.

Testing

One of the most useful things OmegaT users can do is... to use OmegaT. And when they find things that don't work, or deficiencies in the documentation, to tell us about them.

Publicity

Have you ever written an article for your professional association's journal? If not, why not write an article on using OmegaT?

Donations

If you have found OmegaT useful and would like to express your gratitude by making a donation on our Paypal account.

Programming (Java)

OmegaT is written in Java. If you're a programmer and you happen to know Java, please check the documentation in the source code under /docs_devel for information on how to get started.

Programming (not Java)

If you can program in another language, you can write code to support the core application. Such auxiliary code has already been written in Javascript, Groovy and Tcl/Tk, for instance.

But I can't program at all, I hear you say. Well, have you considered learning? If you are already reasonably familiar with computers in general and choose a straightforward scripting language like Javascript or Tcl/Tk, you could teach yourself enough to be able to write simple but useful scripts within just a couple of weeks. Continuing Professional Development is the current buzzword!