Open-Source Testing · danielpalme

ReportGenerator

ReportGenerator is a mature .NET code coverage visualization tool that transforms raw coverage reports from multiple sources (Coverlet, OpenCover, JaCoCo, etc.) into human-readable HTML, XML, and other formats. It supports merging multiple coverage files and offers both open-source and paid PRO features, with active maintenance and strong adoption in the .NET ecosystem.

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Source: GitHub — github.com/danielpalme/ReportGenerator

3.1k

GitHub stars

299

Forks

Primary language

Apache-2.0

License (OSI-approved)

Key facts

Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.

Field	Value
Repository	danielpalme/ReportGenerator
Owner	danielpalme
Primary language	C#
License	Apache-2.0 — OSI-approved
Stars	3.1k
Forks	299
Open issues	2
Latest release	v5.5.10 (2026-05-10)
Last updated	2026-06-21
Source	https://github.com/danielpalme/ReportGenerator

What ReportGenerator is

Built in C# and targeting .NET Framework 4.7+ and .NET Core 8.0+, ReportGenerator parses standardized coverage report formats and generates visual reports through a command-line interface, dotnet global tool, or programmatic API. It includes plugin architecture for custom reports and history storage, supporting assembly/class/file filtering and risk hotspot analysis.

Quickstart

Get the ReportGenerator source

Clone the repository and explore it locally.

terminalbash

1git clone https://github.com/danielpalme/ReportGenerator.git2cd ReportGenerator3# follow the project's README for install & configuration

Need it deployed, integrated, or customized instead? DEV.co ships production installs.

Best use cases

CI/CD Coverage Visualization

Integrate into Azure DevOps, GitHub Actions, or build pipelines to automatically generate and archive coverage reports as part of continuous integration workflows.

Multi-Format Coverage Aggregation

Merge coverage reports from diverse tools (Coverlet, OpenCover, dotCover, NCover, Cobertura, JaCoCo, Clover, gcov, lcov) into unified, easy-to-read dashboards for cross-team visibility.

Historical Coverage Trend Analysis

Track coverage evolution over time using the history storage feature to identify regressions, measure improvement, and support data-driven decisions on test quality.

Implementation considerations

Requires .NET Core 8.0+ or .NET Framework 4.7 runtime; verify your CI/CD agents and build machines meet these prerequisites.
Choose deployment model early: command-line tool, global dotnet tool, or programmatic ReportGenerator.Core API depending on workflow (build scripts, container, or custom code).
Configure assembly/class/file filters and risk hotspot settings upfront to match team conventions and avoid recurring report noise.
Plan history directory storage (local, shared, or cloud) if trend analysis is needed; ensure retention and performance for multi-year datasets.
Test plugin extensibility if custom report formats or history storage backends are required; verify NuGet dependencies are pinned for reproducibility.

When to avoid it — and what to weigh

Non-.NET Ecosystem Projects — While ReportGenerator accepts JaCoCo/Cobertura/lcov input, it is fundamentally a .NET tool. Non-.NET teams should evaluate language-native tools for better integration.
Real-time Coverage Dashboards — ReportGenerator is a report generator, not a live coverage dashboard. If you need persistent, queryable coverage metrics and real-time updates, consider dedicated SaaS platforms.
Lightweight, Embedded Reporting — Heavy dependency chains and multiple distribution packages (NuGet, global tool, Core) add complexity. Teams needing minimal dependencies should evaluate simpler alternatives.
Proprietary Coverage Format Support — ReportGenerator supports major industry formats but not proprietary in-house coverage formats without custom plugin development.

License & commercial use

ReportGenerator is licensed under Apache License 2.0, a permissive OSI-approved license allowing commercial use, modification, and distribution with minimal restrictions. A separate paid PRO license is offered for advanced features; the open-source version covers standard coverage reporting.

Apache 2.0 permits unrestricted commercial use, including closed-source commercial products and SaaS offerings. No license restrictions prevent commercial deployment. However, verify whether PRO features (if integrated) require separate commercial licensing; standard open-source version imposes no commercial use barriers.

DEV.co evaluation signals

Editorial assessment — not user reviews. Directional, with an explicit confidence level.

Signal	Assessment
Maintenance	Active
Documentation	Strong
License clarity	Clear
Deployment complexity	Low
DEV.co fit	Strong
Assessment confidence	High

Security considerations

Open-source, Apache 2.0 licensed; source code auditable on GitHub. No claims made about security posture or vulnerability tracking here. Standard supply-chain practices apply: verify NuGet package signatures, pin dependency versions in CI/CD, and monitor GitHub security advisories for any reported issues affecting the tool or its dependencies.

Alternatives to consider

OpenCover / Coverlet

These are coverage instrumentation/collection tools, not visualization tools; they are complementary, not replacements, but can be chained with other viewers like SonarQube.

Codecov / Coveralls SaaS

Cloud-hosted coverage dashboards offering real-time visibility, historical trends, and PR commenting; require external account and network access but reduce infrastructure burden.

SonarQube Code Coverage Integration

Enterprise code quality platform with built-in coverage visualization; offers more comprehensive static analysis but higher complexity and licensing cost than standalone ReportGenerator.

Software development agency

Build on ReportGenerator with DEV.co software developers

Integrate ReportGenerator into your .NET CI/CD pipeline to transform raw coverage data into actionable reports. Try the free open-source version or upgrade to PRO for advanced features.

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ReportGenerator FAQ

Can ReportGenerator merge coverage reports from different tools?

Yes; it accepts reports from Coverlet, OpenCover, dotCover, Visual Studio, NCover, Cobertura, JaCoCo, Clover, gcov, and lcov. Pass multiple report paths (semicolon-separated) to merge them into one report.

What are the licensing costs?

Open-source version is free (Apache 2.0). PRO license is available for purchase at reportgenerator.io/pro; sponsorship via GitHub provides exclusive PRO features. Pricing not disclosed in provided data.

How do I integrate ReportGenerator into my CI/CD pipeline?

Use the global dotnet tool (`dotnet tool install -g dotnet-reportgenerator-globaltool`), NuGet package, Azure DevOps extension, or GitHub Action. CLI and GitHub Actions integrations are documented in the wiki.

Can I customize the report format or storage backend?

Yes; ReportGenerator.Core NuGet package enables plugin development for custom reports and custom history storage. Wiki documents the plugin APIs and examples.

Custom software development services

Need help beyond evaluating ReportGenerator? DEV.co is a software development agency offering software development services and web development for teams of every size. Our software developers and web developers build custom software, web applications, APIs, and open-source testing integrations — and maintain them long-term.

Visualize Your Code Coverage Today

Integrate ReportGenerator into your .NET CI/CD pipeline to transform raw coverage data into actionable reports. Try the free open-source version or upgrade to PRO for advanced features.

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