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Tencent / RapidJSON C++


腾讯 c++ json

项目最近一次提交:9 个月 前 d48290e38

文件列表 提交日期 作者 提交信息 提交编号
CMakeModules / 2016-06-10 10:15:45 4_miloyip miloyip Change googletest search path for cmake ce3ca58f
bin / 2017-12-04 13:19:14 No_avatar Matthis Thorade Delete .DS_Store 79d5e236
contrib / 2017-07-27 22:17:31 No_avatar Bart Muzzin Issue #1028: Visual Studio natvis file. 707fd36a
doc / 2017-12-28 16:32:26 No_avatar Haffon GetParseOffset to GetErrorOffset 7dfeee86
docker / 2016-03-02 01:45:05 4_miloyip miloyip Add debian docker file for development 680c1112
example / 2017-12-13 21:53:18 4_miloyip miloyip Add archiver example f2a28ee4
include / 2017-12-22 19:24:15 No_avatar Lele Gaifax Fix FileWriteStream doc 20d44d9c
test / 2018-01-13 12:51:24 4_miloyip miloyip Another try to fix travis build d48290e3
thirdparty / 2016-06-08 09:36:03 No_avatar Zhang Ye Update reference to gtest thirdparty ... 47d73200
.gitattributes 2016-03-04 11:52:18 4_miloyip miloyip Normalize line endings but not JSON f... a6277748
.gitignore 2017-12-04 13:15:01 No_avatar Matthis Thorade ignore DS_Store files 25c1b78f
.gitmodules 2016-06-08 09:36:03 No_avatar Zhang Ye Update reference to gtest thirdparty ... 47d73200
.travis.yml 2017-09-13 17:03:23 4_miloyip miloyip Change from miloyip/rapidjson to Tenc... 4a2f2729 2017-11-04 10:32:02 No_avatar Martin Lindhe fix some typos 8684c996
CMakeLists.txt 2017-10-24 12:25:47 No_avatar M.Tayel Fixed typo in CMake file f4b1f761 2017-09-13 17:03:23 4_miloyip miloyip Change from miloyip/rapidjson to Tenc... 4a2f2729 2017-03-14 10:27:36 No_avatar Clemens Arth update to create config file which is... b91c515a 2014-11-11 23:26:59 No_avatar Andriy Senkovych Add initial CMake support 8ae1c971
appveyor.yml 2016-08-25 14:35:17 4_miloyip miloyip Version 1.1.0 17254e09
include_dirs.js 2016-05-09 16:45:18 No_avatar Andrea Colaci include folder added f8df6377

RapidJSON logo

Release version

A fast JSON parser/generator for C++ with both SAX/DOM style API

Tencent is pleased to support the open source community by making RapidJSON available.

Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.

Build status

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RapidJSON is a JSON parser and generator for C++. It was inspired by RapidXml.

  • RapidJSON is small but complete. It supports both SAX and DOM style API. The SAX parser is only a half thousand lines of code.

  • RapidJSON is fast. Its performance can be comparable to strlen(). It also optionally supports SSE2/SSE4.2 for acceleration.

  • RapidJSON is self-contained and header-only. It does not depend on external libraries such as BOOST. It even does not depend on STL.

  • RapidJSON is memory-friendly. Each JSON value occupies exactly 16 bytes for most 32/64-bit machines (excluding text string). By default it uses a fast memory allocator, and the parser allocates memory compactly during parsing.

  • RapidJSON is Unicode-friendly. It supports UTF-8, UTF-16, UTF-32 (LE & BE), and their detection, validation and transcoding internally. For example, you can read a UTF-8 file and let RapidJSON transcode the JSON strings into UTF-16 in the DOM. It also supports surrogates and "\u0000" (null character).

More features can be read here.

JSON(JavaScript Object Notation) is a light-weight data exchange format. RapidJSON should be in full compliance with RFC7159/ECMA-404, with optional support of relaxed syntax. More information about JSON can be obtained at

Highlights in v1.1 (2016-8-25)

For other changes please refer to change log.


RapidJSON is cross-platform. Some platform/compiler combinations which have been tested are shown as follows.

  • Visual C++ 2008/2010/2013 on Windows (32/64-bit)
  • GNU C++ 3.8.x on Cygwin
  • Clang 3.4 on Mac OS X (32/64-bit) and iOS
  • Clang 3.4 on Android NDK

Users can build and run the unit tests on their platform/compiler.


RapidJSON is a header-only C++ library. Just copy the include/rapidjson folder to system or project's include path.

RapidJSON uses following software as its dependencies:

  • CMake as a general build tool
  • (optional) Doxygen to build documentation
  • (optional) googletest for unit and performance testing

To generate user documentation and run tests please proceed with the steps below:

  1. Execute git submodule update --init to get the files of thirdparty submodules (google test).
  2. Create directory called build in rapidjson source directory.
  3. Change to build directory and run cmake .. command to configure your build. Windows users can do the same with cmake-gui application.
  4. On Windows, build the solution found in the build directory. On Linux, run make from the build directory.

On successful build you will find compiled test and example binaries in bin directory. The generated documentation will be available in doc/html directory of the build tree. To run tests after finished build please run make test or ctest from your build tree. You can get detailed output using ctest -V command.

It is possible to install library system-wide by running make install command from the build tree with administrative privileges. This will install all files according to system preferences. Once RapidJSON is installed, it is possible to use it from other CMake projects by adding find_package(RapidJSON) line to your CMakeLists.txt.

Usage at a glance

This simple example parses a JSON string into a document (DOM), make a simple modification of the DOM, and finally stringify the DOM to a JSON string.

// rapidjson/example/simpledom/simpledom.cpp`
#include "rapidjson/document.h"
#include "rapidjson/writer.h"
#include "rapidjson/stringbuffer.h"
#include <iostream>

using namespace rapidjson;

int main() {
    // 1. Parse a JSON string into DOM.
    const char* json = "{\"project\":\"rapidjson\",\"stars\":10}";
    Document d;

    // 2. Modify it by DOM.
    Value& s = d["stars"];
    s.SetInt(s.GetInt() + 1);

    // 3. Stringify the DOM
    StringBuffer buffer;
    Writer<StringBuffer> writer(buffer);

    // Output {"project":"rapidjson","stars":11}
    std::cout << buffer.GetString() << std::endl;
    return 0;

Note that this example did not handle potential errors.

The following diagram shows the process.


More examples are available:



    • simplereader: Dumps all SAX events while parsing a JSON by Reader.
    • condense: A command line tool to rewrite a JSON, with all whitespaces removed.
    • pretty: A command line tool to rewrite a JSON with indents and newlines by PrettyWriter.
    • capitalize: A command line tool to capitalize strings in JSON.
    • messagereader: Parse a JSON message with SAX API.
    • serialize: Serialize a C++ object into JSON with SAX API.
    • jsonx: Implements a JsonxWriter which stringify SAX events into JSONx (a kind of XML) format. The example is a command line tool which converts input JSON into JSONx format.
  • Schema

    • schemavalidator : A command line tool to validate a JSON with a JSON schema.
  • Advanced

    • prettyauto: A modified version of pretty to automatically handle JSON with any UTF encodings.
    • parsebyparts: Implements an AsyncDocumentParser which can parse JSON in parts, using C++11 thread.
    • filterkey: A command line tool to remove all values with user-specified key.
    • filterkeydom: Same tool as above, but it demonstrates how to use a generator to populate a Document.