Regex Tester & Debugger

Test JavaScript regular expressions with live matches

๐Ÿ”’ 100% ๋ธŒ๋ผ์šฐ์ € ๋‚ด๐Ÿ†“ ํ‰์ƒ ๋ฌด๋ฃŒโšก ๊ฐ€์ž… ์—†์Œ
์ฐธ๊ณ : ์•„๋ž˜ ํˆด ์ธํ„ฐํŽ˜์ด์Šค๋Š” ํ˜„์žฌ ์˜์–ด๋กœ๋งŒ ์ œ๊ณต๋ฉ๋‹ˆ๋‹ค. UI๋Š” ํ•˜๋‚˜์”ฉ ๋ฒˆ์—ญ ์ค‘์ž…๋‹ˆ๋‹ค. ์ด ํˆด์„ ์˜์–ด๋กœ ๋ณด๊ธฐ โ†’
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0 matches

์‚ฌ์šฉ๋ฒ•

  1. 1
    Enter your pattern

    Type or paste your regex in the pattern box. Pick the flags you need (g, i, m, s, u).

  2. 2
    Add test text

    Paste the string you want to test against. Matches update live.

  3. 3
    Inspect matches

    See highlighted matches, capture groups, and total match count in real time.

Regex Tester & Debugger ์†Œ๊ฐœ

Free online regex tester for JavaScript regular expressions. See matches highlighted live as you type, view capture groups, test flags (g, i, m, s, u, y), and get match counts. Runs entirely in your browser - no signup, no ads inside the tool. 712 Tools์˜ Regex Tester & Debugger์€ ์ตœ์‹  JavaScript API๋ฅผ ์‚ฌ์šฉํ•ด ์—ฌ๋Ÿฌ๋ถ„์˜ browser์—์„œ ์™„์ „ํžˆ ๋™์ž‘ํ•ฉ๋‹ˆ๋‹ค - server๊ฐ€ ์—ฌ๋Ÿฌ๋ถ„์˜ ๋ฐ์ดํ„ฐ๋ฅผ ๋ณผ ์ผ์ด ์ ˆ๋Œ€ ์—†์Šต๋‹ˆ๋‹ค. ์ฆ‰, ์ฆ‰๊ฐ์ ์ธ ๊ฒฐ๊ณผ, ์™„์ „ํ•œ ํ”„๋ผ์ด๋ฒ„์‹œ, ๊ทธ๋ฆฌ๊ณ  ์—…๋กœ๋“œ ์ œํ•œ์ด ์—†์Šต๋‹ˆ๋‹ค.

debugging ์„ธ์…˜, ๋น ๋ฅธ sanity check, ๋˜๋Š” ํ”„๋กœ๋•์…˜ ์ธ์‹œ๋˜ํŠธ - ์–ด๋–ค ์ƒํ™ฉ์ด๋“  ์ด ํˆด์€ ์›ํ•˜๋Š” ๋งŒํผ ๋ฌด๋ฃŒ๋กœ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์›Œํ„ฐ๋งˆํฌ ์—†์Œ, ๊ฐ€์ž… ์—†์Œ, ํˆด ๋‚ด ๊ด‘๊ณ  ์—†์Œ.

์ž์ฃผ ๋ฌป๋Š” ์งˆ๋ฌธ

Which regex flavor is this?

JavaScript (ECMAScript) - the same regex engine that runs in your browser and Node.js.

Does it support named groups?

Yes. Named capture groups like (?<year>\d{4}) are shown alongside numbered groups in the results panel.

Is my pattern or text uploaded?

No. Everything runs in your browser via the native RegExp engine.

Why is my pattern hanging?

You may have hit catastrophic backtracking - a common issue with nested quantifiers like (a+)+. Simplify the pattern.

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The regex cheat sheet every JavaScript developer actually needs

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Why your JSON won't parse (and how to fix it in 30 seconds)

Trailing commas, unquoted keys, single quotes, comments - the five errors that break 90% of hand-written JSON, and how to catch them without a build step.

๊ด€๋ จ ํˆด

JSON Formatter

Pretty-print, minify, and validate JSON instantly

SQL Formatter

Format SQL queries with proper indentation and keyword capitalization

JSON Diff

Structural diff of two JSON documents - added, removed, changed

User-Agent Parser

Parse any User-Agent string into browser, OS, device, and engine

Word Counter

Count words, characters, sentences, paragraphs, reading time

Case Converter

Convert text to UPPERCASE, lowercase, camelCase, snake_case, kebab-case, and more