
RegexPlanet Ruby
rubular
RegExr
RegEx Generator
Expresso
Reggy
The Regex Coach
Regex Widget
Best Programming Toolkit
tooltool.net
JSONLint
FreeFormatter
JSONFormatter.org
JSON Formatter & Validator
All Over Tools
DevToys
RegexPlanet Rubyrubular - A ruby based regular expression editor
tooltool.net - Online toolkit designed for software engineers and developers, including JSON parsing, Base64 encoding/decoding, MD5 encryption, URL encoding/decoding, timestamp conversion, UUID generation and other practical tools.
RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.
JSONLint - JSON Lint is a web based validator and reformatter for JSON, a lightweight data-interchange format.
RegEx Generator - RegEx Generator is a simple-to-use application that comes with the brilliance of intuitive regex and is also helping you out to test the regex.
FreeFormatter - Freeformatter is a platform that contains free online tools for developers, including formatters (json, html, xml, sql, etc.), minifiers (css, javascript), compactors, validators, and much more.