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Welcome to the documentation wiki for Ocelot, an XLIFF+ITS 2.0 Editor.

Ocelot is a free, open source editor with advanced features for reviewing and correcting translations. It is licensed under LGPL 3.0.

It implements the reading, rendering and writing of Internationalization Tag Set 2.0 Localization Quality Issue, Provenance and MT Confidence metadata categories.

Ocelot can also be used as a general XLIFF 1.2 Editor. Ocelot reads and renders ITS 2.0 metadata if it is present. If not, Ocelot continues to function.

Current Release

The current release of Ocelot is 2.2.

Getting Started


2017-02-09: Changes coming in next version
2016-11-09: Ocelot 2.2 Released. Download
2016-01-11: Ocelot 2.0 is available for download, including XLIFF 2.0 support,
Translation Memory look-up and Concordance Search. See the release announcement for more information.
2015-04-29: Ocelot and the FREME Project.
2014-09-01: Read about how Ocelot is used in the QuEst Project
2014-08-28: Ocelot 1.1 available for download. See the release notes for more information.
2014-06-06: Three presentations relating to Ocelot at Localization World, Dublin.
2014-04-11: DITA Roundtrip with XLIFF+ITS 2.0
2014-03-07: We are currently assessing the work required to support XLIFF 2.0
2014-02-28: The downloads page for pre-built binaries has changed. The link below right is updated.

Source Code, Downloads and Resources

Source code is here:

Pre-compiled builds for download are here:

Overview video:

Bugs, issues, or enhancement requests can be filed in the Ocelot issue tracker

User Interface


Benefits With ITS 2.0

  • Directing the effort of linguistic reviewers and post-editors