Extraction13 chars · /g
Regex to Extract JSON Keys
A quick way to pull top-level and nested key tokens from JSON-like text during debugging or migration prep.
The expression
/"([^"]+)"\s*:/gHow to read it
\s matches any whitespace, including tabs and newlines.
A negated class [^ … ] matches anything except the listed characters.
g — global — keep going after the first match instead of stopping
Find matches in your own text
no inputTry:
This expression is unanchored, so it finds every occurrence anywhere in the text. Highlighted runs are what a replace call would rewrite.
Examples, checked in your browser
4/4 verified{"id": 1, "name": "Ada"}
Matches 2 times.
"status" : "ok"
Matches.
[1,2,3]
No match — this is the kind of input the pattern rejects.
no-json-here
No match — this is the kind of input the pattern rejects.
Use it in code
3 languagesJavaScript
const regex = /"([^"]+)"\s*:/g;
regex.test(input);Python
import re
pattern = re.compile(r""([^"]+)"\s*:")
bool(pattern.search(input))Go
re := regexp.MustCompile("\"([^\"]+)\"\\s*:")
matched := re.MatchString(input)Other extraction patterns
4GroupExtraction
Flags/g
Examples4
SafetyOK