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Niels Lohmann

@nlohmann

Joined on 29 November 2009

You may know me from my JSON library for C++.

GitHub Stats

3096

Followers

Repositories

Organizations

Gists

495

Pull Requests

399

Issues

165

Commits

Contributed To

51644

Star Earned

Most Used Languages

93.62%

C++

2.11%

Python

1.80%

CMake

1.27%

CSS

0.80%

HTML

0.25%

Makefile

0.05%

Starlark

0.05%

Jinja

Popular Projects

json

JSON for Modern C++

C++

50406

7469

2408

1661

swagger_to_uml

Convert OpenAPI specifications (a.k.a. Swagger) to PlantUML diagrams

Python

268

fifo_map

a FIFO-ordered associative container for C++

C++

211

mutate_cpp

C++ Mutation Test Environment

CSS

193

cmake_min_version

Determine the minimal requirement CMake version of a project

Python

178

crow

Crow - a C++ client for Sentry

C++

140

Top Contributions

Top contributions made by the user in the last year.

json
@theodelrieu
01

Use #if instead of #ifndef in test, fixes #3859

Charts

Follow Up

Activity Graph

Contributions Calendar

Contributions made by the user in the last 365 days.

Recent Activity

8/20/2026, 1:27:35 PM

Pushed commit(s) to nlohmann/json on branch dump-function-performance-hcj2bl

8/20/2026, 12:31:14 PM

Pushed commit(s) to nlohmann/json on branch todo-49-fix-bd32cc

8/20/2026, 11:56:58 AM

Created New branch on nlohmann/json branchclaude/loving-chaum-14587d

8/20/2026, 12:30:00 PM

Pushed commit(s) to nlohmann/json on branch dump-function-performance-hcj2bl

8/20/2026, 11:57:22 AM

opened pull request on nlohmann/json

8/20/2026, 7:16:07 AM