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Regex101

Write and debug regular expressions live

Toolora score94Free

Free

RegExr

Write a regex, see matches, and get it explained

Toolora score93Free

Free

JSONLint

Paste JSON, validate it, and pretty-print it

Toolora score91Free

Free

Spec	Regex101	RegExr	JSONLint
Category	Productivity	Productivity	Productivity
Pricing	Free	Free	Free
Toolora score	94/100	93/100	91/100
Best for	regex, debug, dev, test	regex, testing, cheatsheet, debug	json, validate, format, debug
Top features	·Live match highlighter ·Explain mode ·Multiple flavors	·Live match highlighting ·Explain and cheatsheet ·JavaScript and PCRE flavors	·Validate JSON ·Pretty-print and compact ·Error line numbers