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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 or XLIFF 2.0 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 3.0.

Getting Started


2017-10-17: Ocelot 3.0 available for download. See the release notes for more information.
2017-06-09: We are currently working on adding Spellchecking within Ocelot.
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


Windows 10 and high DPI monitors

The current version of Ocelot is not fully compatible with Windows 10. Moreover some users report that Ocelot looks very small in high resolution monitors. So in order to make Ocelot work properly in Windows 10 and look normal in high DPI monitors, please try to follow the steps below:

  1. Navigate to the folder where the Ocelot exe file is located and right click on it.
  2. Select the "properties" command
  3. Select the "Compatibility" tab
  4. Flag the "Run this program in compatibility mode for" option and select "Windows 8" from the dropdown menu
  5. If using a high DPI display, flag the "Disable display scaling on high DPI display settings" option
  6. Press "Ok" button.

In case Ocelot still looks tiny, try to reduce the screen resolution:

  1. Go to your computer Display Settings
  2. Click "Advanced display settings"
  3. Reduce your screen resolution
  4. Click "Keep changes"

Benefits With ITS 2.0

  • Directing the effort of linguistic reviewers and post-editors