JSON for Modern C++
C-Rank Grade: B (Solid) - 53/100
External PR Merge Rate: 61%
Response Time: 8h
First Timer Success: 50%
nlohmann/json has a recorded first-timer success rate of 50.0%. Repositories ranked B typically provide actionable feedback during code reviews and actively nurture new community contributors.
Maintainers in nlohmann/json respond to incoming external pull requests in approximately 7.8 hours on average. Keeping PRs focused on single tasks and ensuring tests pass helps maintainers review faster.
The C-Rank™ system evaluates GitHub projects on a 0–100 scale using real data: PR merge rates, review turnaround time, active maintainer presence, and first-time contributor success. A score of 53.1 places nlohmann/json in the B tier.
The external contributor pull request merge rate for nlohmann/json is 61.3%, based on public PR activity from non-core contributors.
nlohmann/json currently has 3 active issue(s) tagged with beginner-friendly labels like "good first issue", "beginner", or "up-for-grabs".
Average Response Latency
Tracks hours until a maintainer leaves a review, comment, or PR response.
External Acceptance Rate
Percentage of community pull requests successfully merged into main.
First PR Conversion
Rate at which developers submitting their first repository PR succeed.
Show contributors that your repository actively reviews and merges external pull requests.
[](https://getmerged.abhishekco.de/nlohmann/json?utm_source=github&utm_medium=badge)
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This repository currently has 3 open good first issue tickets available for newcomers.
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When evaluating whether to contribute to nlohmann/json, response velocity and maintainer engagement are crucial. GetMerged continuously tracks pull request trajectories, first-comment latency, and code review rounds to help developers avoid submitting pull requests to backlogged repositories.
Currently, maintainers of nlohmann/json acknowledge new external contributions in approximately 7 hours. Out of all submitted pull requests from non-core authors in the last 180-day window, 61.3% were successfully merged into the primary branch.
nlohmann/json has a recorded first-timer success rate of 50.0%. Repositories ranked Solid typically provide actionable feedback during code reviews and actively nurture new community contributors.
The initial maintainer response time averages ~7 hours. Keeping PRs scoped to single concerns and ensuring CI checks succeed will optimize review turnaround.
The C-Rank™ index scores repositories on a 0 to 100 scale using an objective formula: external PR merge rates, initial response speed, active maintainer count, and first-time contributor retention. A score of 53.1 places nlohmann/json in the Solid tier.
The external pull request merge rate is 61.3%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.
Yes, nlohmann/json currently has 3 active issue(s) tagged with beginner-friendly labels. You can inspect these directly from the repository issues tab.
All metrics displayed for nlohmann/json are automatically retrieved via the public GitHub API and recalculated daily. Insider pull requests submitted by repository owners or organization members are excluded from merge rate calculations to preserve objective external contributor statistics.