Project Summary
An implementation of the JSON specification according to RFC 4627 for Ruby. Includes a (very fast) native implementation, written in C, and a pure Ruby implementation. Also includes a GTK+ GUI tool for editing JSON.
This library is part of Ruby 1.9's standard library.
Badges
In a Nutshell, JSON for Ruby...
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has a well established, mature codebase
maintained by a very large development team
with decreasing Y-O-Y commits -
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took an estimated 4 years of effort (COCOMO model)
starting with its first commit in August, 2009
ending with its most recent commit 2 days ago
Quick Reference
GNU General Public License v2.0 or later
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These details are provided for information only. No information here is legal advice and should not be used as such.
Ruby License
Permitted
Commercial Use
Modify
Distribute
Sub-License
Forbidden
Hold Liable
Required
Disclose Source
Include Copyright
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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30 Day SummaryJul 10 2026 — Aug 9 2026
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