# nlohmann/json

> Header-only C++11 library that treats JSON as a first-class data type: parsing, serialization, STL-like access, JSON Pointer/Patch, and binary formats (CBOR, MessagePack, BSON).

- Magnitude: 1.0 out of 10 — Steady
- Stars: 50,830 total · +1 star measured 2026-11-01, 00:09–10:27 UTC, ≈ 4 by evening
- Star trust: star growth looks organic
- Category: Developer tools · Language: C++ · License: MIT · Created: 2013-07-04 · Last push: 2026-11-01
- GitHub: https://github.com/nlohmann/json · Homepage: https://json.nlohmann.me · Page: https://gitnova.dev/en/r/nlohmann/json

## Useful for

- Drop in the single json.hpp header and parse config files with no dependencies
- Serialize C++ structs to JSON and back via to_json/from_json
- Exchange data over the wire using CBOR or MessagePack

## Why it’s here

- Star-counter measurements on 2026-11-01 (UTC), 00:09–10:27: 50829 → 50830 stars (+1). This is the change over that interval.
- Estimated end-of-day forecast: about +3 stars, using observed gains and the previous day.

## Star trust

Star growth looks organic.

Star-trust labels are heuristics based on the repository’s behavior, not a check of every stargazer.

## Numbers

- Forks: 7,512
- Issues and pull requests: 4,626
- Watchers: 731
- Average over the last week: 7 per day
- Usual pace: 7 per day
- Stars in the last hour (measured): 0
- Latest release: v3.12.0 (2025-04-11)

## Stars per day, last 30 days (oldest → newest, today is partial)

2026-10-04 … 2026-11-02: 9, 5, 9, 12, 12, 5, 8, 5, 5, 10, 5, 8, 4, 7, 4, 10, 10, 7, 6, 8, 5, 3, 9, 8, 6, 7, 7, 6, 1, None

## Magnitude by day, last 14 days

10-19 1.0, 10-20 1.5, 10-21 1.4, 10-22 1.2, 10-23 1.3, 10-24 1.4, 10-25 1.2, 10-26 1.0, 10-27 1.3, 10-28 1.1, 10-29 1.4, 10-30 1.3, 10-31 1.3, 11-01 1.1

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Magnitude (0–10) measures how fast and how unusually interest in a repository is growing right now. It is not a quality score.
Days are UTC. “So far today” is a fact; “expected by the end of the day” is a forecast.
Summaries and use cases are written by an LLM (DeepSeek V4.1 Flash) from the README and may be inaccurate: verify specific claims (benchmarks, speed, hardware) in the repository itself.
Data as of 2026-11-01 10:29 UTC, updated every 30 minutes.