ArduinoJson (community library)


Name Value
Name ArduinoJson
Version 6.17.3
Installs 332916
License MIT
Author Benoit Blanchon <>
Maintainer Benoit Blanchon <>
Download .tar.gz
All Versions 6.17.3, 6.17.2, 6.17.1, 6.17.0, 6.16.1, 6.16.0, 6.15.2, 6.15.1, 6.15.0, 6.14.1, 6.14.0, 6.13.0, 6.12.0, 6.11.5, 6.11.4, 6.11.3, 6.11.2, 6.11.0, 6.10.1, 6.10.0, 6.9.1, 5.13.5, 5.13.4, 5.13.3, 5.11.2, 5.11.1, 5.8.4

A simple and efficient JSON library for embedded C++. ArduinoJson supports ✔ serialization, ✔ deserialization, ✔ MessagePack, ✔ fixed allocation, ✔ zero-copy, ✔ streams, ✔ filtering, and more. It is the most popular Arduino library on GitHub ❤❤❤❤❤. Check out for a comprehensive documentation.

Example Build Testing

Device OS Version:

This table is generated from an automated build. Success only indicates that the code compiled successfully.

Library Read Me

This content is provided by the library maintainer and has not been validated or approved. [image unavailable]

arduino-library-badge Continuous Integration Continuous Integration Fuzzing Status Coverage Status GitHub stars

ArduinoJson is a C++ JSON library for Arduino and IoT (Internet Of Things).




Here is a program that parses a JSON document with ArduinoJson.

char json[] = "{\"sensor\":\"gps\",\"time\":1351824120,\"data\":[48.756080,2.302038]}";

DynamicJsonDocument doc(1024);
deserializeJson(doc, json);

const char* sensor = doc["sensor"];
long time          = doc["time"];
double latitude    = doc["data"][0];
double longitude   = doc["data"][1];

See the tutorial on


Here is a program that generates a JSON document with ArduinoJson:

DynamicJsonDocument doc(1024);

doc["sensor"] = "gps";
doc["time"]   = 1351824120;
doc["data"][0] = 48.756080;
doc["data"][1] = 2.302038;

serializeJson(doc, Serial);
// This prints:
// {"sensor":"gps","time":1351824120,"data":[48.756080,2.302038]}

See the tutorial on

Support the project

Do you like this library? Please star this project on GitHub!

What? You don't like it but you love it? We don't take donations anymore, but we sell a book, so you can help and learn at the same time.

Browse Library Files