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EclEmma
What it is
EclEmma is a free Java code coverage tool that brings coverage analysis into the Eclipse workbench. It supports local Java applications, Eclipse and RCP applications, Equinox OSGi, JUnit, TestNG, several Eclipse testing setups, SWTBot tests, and Scala applications. Its Coverage view summarizes results by Java project and supports drill-down to methods, while source editors highlight covered and uncovered code. Coverage summaries can use instruction, branch, line, method, type, and cyclomatic complexity counters. Developers can switch among multiple coverage sessions or merge results from separate test runs. EclEmma imports JaCoCo .exec execution data and exports reports in HTML, XML, or CSV, as well as JaCoCo execution data files. It is based on JaCoCo and can be installed through the Eclipse Marketplace Client, an update site, or manual installation. The installation requirements include Eclipse 3.8 or higher, Java 1.5 or higher, and Eclipse Java development tools; the project says it has no particular operating-system dependency. EclEmma is available at no cost under the Eclipse Public License 2.0. Its Eclipse integration is focused on individual developers.
For and against
For
- Free under the Eclipse Public License 2.0
- Coverage can be inspected down to method level
- Supports multiple coverage counters
- Can merge separate test-run sessions
- Exports HTML, XML, and CSV reports
Against
- Requires Eclipse 3.8 or higher
- Requires Java 1.5 or higher and Eclipse Java development tools
- Eclipse integration focuses on individual developers
The verdict
EclEmma adds coverage analysis and report export to Eclipse, with support for multiple test types and session merging. Its stated requirements make the Eclipse and Java versions worth checking before installation.
Who it suits
EclEmma suits individual developers who use Eclipse and need coverage analysis for Java or Scala applications. The project points users seeking automated-build integrations to JaCoCo integrations.
Plans and prices
Free
Eclipse plug-in · Java code coverage
Read 7 Oct 2026 · eclemma.org
On the record
- Coverage analysis
- The Coverage view summarizes coverage by Java project and allows drill-down to method level, while source editors highlight covered and uncovered code.eclemma.org · read 7 Oct 2026
- Coverage counters
- Coverage summaries can use instruction, branch, line, method, type, and cyclomatic complexity counters.eclemma.org · read 7 Oct 2026
- Import and export
- EclEmma imports JaCoCo .exec execution data and exports coverage reports in HTML, XML, or CSV, as well as JaCoCo execution data files.eclemma.org · read 7 Oct 2026
- Integrations
- EclEmma is based on JaCoCo and is available through the Eclipse Marketplace Client, an update site, or manual installation.eclemma.org · read 7 Oct 2026
- Intended users
- The Eclipse integration focuses on supporting individual developers; the site points users to JaCoCo integrations for automated builds.eclemma.org · read 7 Oct 2026
- Launch types
- Coverage mode supports local Java applications, Eclipse/RCP applications, Equinox OSGi, JUnit, TestNG, JUnit plug-in tests, JUnit RAP tests, SWTBot tests, and Scala applications.eclemma.org · read 7 Oct 2026
- License
- The program is provided under the Eclipse Public License 2.0.eclemma.org · read 7 Oct 2026
- Purpose
- EclEmma is a Java code coverage tool that brings coverage analysis into the Eclipse workbench.eclemma.org · read 7 Oct 2026
- Release integrity
- The download page lists MD5 and SHA-256 checksums for releases.eclemma.org · read 7 Oct 2026
- Requirements and OS
- The installation page requires Eclipse 3.8 or higher and Java 1.5 or higher, says there is no dependency on a particular operating system, and requires Eclipse Java development tools.eclemma.org · read 7 Oct 2026
- Sessions
- Users can switch between multiple coverage sessions and merge sessions from different test runs.eclemma.org · read 7 Oct 2026
- Support
- The project directs users to its documentation and FAQ, then to the JaCoCo and EclEmma Users group; bugs can be reported through the Eclipse issue tracker.eclemma.org · read 7 Oct 2026
