regex101: Match all parts of the valid JSON

Non-Capturing Group(?:"(\\u[a-zA-Z0-9]{4}|\\[^u]|[^\\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?|([\{\}\[\]]))

1st Alternative"(\\u[a-zA-Z0-9]{4}|\\[^u]|[^\\"])*"(\s*:)?

"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 1(\\u[a-zA-Z0-9]{4}|\\[^u]|[^\\"])*

*repeats the group contents below any number of times:

1st Alternative\\u[a-zA-Z0-9]{4}

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

uthe literal u (117₁₀ / 165₈ / 75₁₆) (case sensitive)

Character Class[a-zA-Z0-9]{4}

{4}matches exactly 4 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

2nd Alternative\\[^u]

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Negated Character Class[^u]

uthe literal u (117₁₀ / 165₈ / 75₁₆) (case sensitive)

3rd Alternative[^\\"]

Negated Character Class[^\\"]

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 2(\s*:)?

?repeats the group contents below at most once:

\s*any whitespace character, repeated any number of times

:the literal : (58₁₀ / 72₈ / 3A₁₆)

2nd Alternative\b(true|false|null)\b

\ban ASCII word boundary

Group 3(true|false|null)

1st Alternativetrue

truethe literal text true (case sensitive)

2nd Alternativefalse

falsethe literal text false (case sensitive)

3rd Alternativenull

nullthe literal text null (case sensitive)

\ban ASCII word boundary

3rd Alternative-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:\.\d*)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d*a digit, repeated any number of times

Non-Capturing Group(?:[eE][+\-]?\d+)?

?repeats the group contents below at most once:

Character Class[eE]

ethe literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

Ethe literal E (69₁₀ / 105₈ / 45₁₆) (case sensitive)

Character Class[+\-]?

?matches at most one character from the set below:

+the literal + (43₁₀ / 53₈ / 2B₁₆)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a digit, repeated at least once

4th Alternative([\{\}\[\]])

Group 4([\{\}\[\]])

Character Class[\{\}\[\]]

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Search reference

Regular Expression

(?:"(\\u[a-zA-Z0-9]{4}|\\[^u]|[^\\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?|([\{\}\[\]]))

New

{
  "a": 1,
  "b": "foo",
  "c": [
    false,
    "false",
    null,
    "null",
    {
      "d": {
        "e": 130000,
        "f": "1.3e5"
      }
    }
  ]
}

Regular Expressions 101

Regular Expression

Substitution