Regex for JSON String Literal

Matches a JSON-style double-quoted string with proper escape sequence handling.

Pattern

/^"([^"\\]|\\.)*"$/

Live Tester

Enter a string to test

Examples

✓ "hello world"

✓ "line\nbreak"

✓ "escaped \\quote"

✗ 'single quotes'

✗ no quotes

✗ "unterminated

Pattern Breakdown

^" — opening double quote

([^"\\]|\\.)* — any non-quote/non-backslash char, or a backslash followed by any char

"$ — closing double quote

Code Snippets

Javascript

const regex = /^"([^"\\]|\\.)*"$/;
regex.test('"hello world"'); // true

Python

import re
pattern = r'^"([^"\\\\]|\\\\.)*"$'
bool(re.match(pattern, '"hello world"'))  # True

Php

$pattern = '/^"([^"\\\\]|\\\\.)*"$/';
preg_match($pattern, '"hello world"'); // 1

Related Patterns

Email Address /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/ URL /^https?:\/\/(www\.)?[a-zA-Z0-9@:%._+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([a-zA-Z0-9()@:%_+.~#?&/=-]*)$/ Phone Number (International) /^\+?[1-9]\d{1,14}$/ Phone Number (US) /^$?[2-9]\d{2}$?[-.\s]?\d{3}[-.\s]?\d{4}$/ Phone Number (EU) /^\+?[1-9][0-9]{0,3}[\s.-]?$?[0-9]{1,5}$?[\s.-]?[0-9]{1,5}[\s.-]?[0-9]{1,5}$/ IPv4 Address /^((25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(25[0-5]|2[0-4]\d|[01]?\d\d?)$/

Frequently Asked Questions

What is the regex for JSON String Literal?▾

The regex pattern for JSON String Literal is /^"([^"\\]|\\.)*"$/. Matches a JSON-style double-quoted string with proper escape sequence handling.

How do I use the JSON String Literal regex in JavaScript?▾

In JavaScript you create the pattern with a regex literal or the RegExp constructor and call .test() to check a string against it. A ready-to-copy example is shown in the Code Snippets section above, alongside Python and PHP versions.

What does the JSON String Literal pattern match?▾

It matches strings like "hello world"; it rejects strings like 'single quotes'. See the Examples section above for the full list of matching and non-matching cases.