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The Okapi Framework is a free, open-source and cross-platform set of components and applications designed to help your localization and translation processes. The project uses and promotes open standards such as XLIFF, TMX, SRX, ITS and other formats. It is an OAXAL 1.0 implementation. About the Log4j2 vulnerabilities (2021) Users Help and Documentation Getting Started — all you need to know to get started using the Okapi tools FAQ — the answers to some of the most asked questions Online Help — the applications online help pages Knowledge Base — various articles on how to work with the Okapi tools Tutorials — step-by-step tutorials on using the Okapi tools Glossary — list of the main terms used in the help and documentation Screenshots — of the applications on different platforms3 Additional support: Users Group — users group and mailing list (or follow us on Twitter) Bug Report & Feature Request — list of bug reports and feature requests(Login required to post one) Send Feedback — email some feedback (no login required) Applications Rainbow — a toolbox to launch a large variety of localization tasks CheckMate — an application to perform quality checks on bilingual files Tikal — a command-line tool for basic localization tasks Ratel — a WYSIWYG editor to create, test and maintain SRX segmentation rules Longhorn — a batch processing server Ocelot — a XLIFF translator/reviewer workbench Components Filters — extract translatable text from various file formats Pipelines and Steps — perform a chain of user-defined tasks on input documents Translation Resource Connectors — provide access to MT, TM, term-bases, etc. Downloads — Stable Release The latest stable release of Rainbow, CheckMate, Tikal, Ratel, etc. (1.48.0 - Jan 16, 2026): Windows 64-bit — Windows platform Linux 64-bit — Linux platform (gtk2, Intel) Macintosh Intel 64-bit — Macintosh platform (Cocoa, Intel) Macintosh Arm 64-bit — Macintosh platform (Cocoa, Apple M1 chip) Longhorn — batch processing server (More information...) Plugin for OmegaT — filters plugin for OmegaT (More information...) Ocelot (v3.0) — XLIFF reviewer workbench (More information...) Changes Log — list of the changes between versions https://okapiframework.org/wiki/index.php/Distributions — all downloads https://search.maven.org/search?q=net.sf.okapi — release artifacts on Maven Central Downloads — Development Release For testers and advanced users, the latest development snapshots are here: Maven artifacts snapshots, nightly build: https://oss.sonatype.org/content/repositories/snapshots Latest snapshot of the distributions: Nightly build on GitLab Developers Project Git repository at GitLab Developer's Guide API Documentation Developers Group and Mailing List     About the Log4j2 vulnerabilities (2021) Continuous Build on GitLab Consultancy resources Bugs and Requests tracking list