ReportGenerator

Overview

ReportGenerator is a command-line utility for turning code coverage reports into readable views and outputs for other tools. It suits developers and teams combining coverage data from different sources; its key trade-off is that some coverage capabilities, including method coverage, require PRO.

Open source under the Apache License and in development since 2009, it runs on Windows, Linux, and macOS. The command line takes only a few parameters, making it a focused reporting step rather than a hosted coverage service.

Key features

ReportGenerator accepts reports from coverlet, OpenCover, dotCover, Visual Studio, NCover, Cobertura, JaCoCo, Clover, gcov, and lcov. That breadth makes it useful when a team needs to bring reports from different coverage tools into a shared reporting workflow. It supports .NET, Java, and Node.js.

Line and branch coverage are visualized in reports, while method coverage is a PRO feature. Historical charts show coverage trends, and a filterable, sortable summary table helps narrow attention to relevant results. Coverage gates can support teams applying coverage criteria in their workflows.

Risk hotspot analysis uses cyclomatic complexity, NPath complexity, and CRAP score when those measures are available, with configurable warning thresholds. The maker also states that GitHub Actions and Azure DevOps are supported.

Outputs include HTML for reading coverage, plus formats such as Clover, Cobertura, OpenCover, SonarQube, lcov, TeamCity summary, XML, Markdown, JSON, CSV, and text. This range helps teams pass results to different tools without limiting the utility to a single report format.

Pricing

The project is free to use under the Apache License, with basic features in the Free plan. A 10-day trial costs nothing and provides full access, useful for evaluating paid capabilities before buying.

Paid licenses are lifetime purchases: Individual costs $79, paid once for one developer, Team costs $249, paid once for up to 10 developers, and Enterprise costs $599, paid once for unlimited developers. The developer count covers people using reports generated by ReportGenerator, whether on their own device or a central build server. The free tier keeps basic reporting available, but method coverage and other PRO features call for a paid license. License activation uses the -license command-line parameter or the REPORTGENERATOR_LICENSE environment variable.

Platforms

ReportGenerator runs on Windows, Linux, and macOS. Its command-line design makes it suited to developer and build workflows across those systems.

Who it's for

Choose ReportGenerator if you need to consolidate coverage reports from multiple tools, generate several output formats, or track trends and risk hotspots in a developer workflow. It is less suitable if you want a hosted reporting service or need method coverage without purchasing PRO.

Pros and cons

• Broad input support: It accepts reports from ten named coverage tools, useful for teams with mixed reporting sources.
• Flexible outputs: HTML and numerous machine-readable formats help serve both people and downstream tools.
• Useful trend and risk views: Historical charts, coverage gates, and configurable hotspot thresholds add context beyond a single coverage snapshot.
• PRO boundary: Method coverage is paid, so teams needing that view should budget for a license rather than assume the free tier covers it.
• Developer-oriented workflow: A command-line tool is a practical fit for build and developer processes, but not a substitute for a hosted reporting service.

Alternatives

For a hosted or self-hosted option with a free plan, consider Coveralls; it is always free for open-source and public repositories. Choose gcov if you want a free option and compile with GCC using coverage instrumentation. OpenClover is another free choice, with no license tiers, keys, or usage limits.

For Ruby coverage, SimpleCov is free and MIT licensed. For Rust coverage, consider cargo-llvm-cov, which is free and open source under Apache-2.0 or MIT. Coverage.py is a free open-source Python coverage tool, with an enterprise subscription available through Tidelift. For an open-source LLVM tool with no paid plans or usage limits stated, see LLVM llvm-cov; Microsoft Code Coverage is a free, closed-source option.

Browse the Test Coverage Tools category for more options.

Verdict

ReportGenerator is a strong fit for developers and teams that need a free, cross-platform command-line reporting step across varied coverage sources and output formats. Its main draw is breadth paired with trend and hotspot views; look elsewhere if you need a hosted service, or choose a paid license if method coverage is essential.