Project Summary
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/SSE4.1 for acceleration.
* Rapidjson is self-contained. 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 16/20 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.
In a Nutshell, rapidjson...
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took an estimated 8 years of effort (COCOMO model)
starting with its first commit in November, 2011
ending with its most recent commit about 1 year ago
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MIT License
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30 Day SummaryDec 17 2025 — Jan 16 2026
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12 Month SummaryJan 16 2025 — Jan 16 2026
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