Web Tools tools.bryantsmith.com

Text & Regex

Find / Replace Tester

Test a literal or regular-expression find and replace before you apply it. See every match, inspect the exact result, and get a readable error when a pattern is invalid — all in your browser, so your text never leaves the page.

Runs in your browser v1.0.0

Find & replace

live
Mode

Literal mode matches exactly what you type. Regular-expression mode supports groups, quantifiers and character classes — use $1, $2 in the replacement to reference capture groups.

Input

original

Output

replaced

Read-only result. Copy or download it with the buttons above.

Match preview

0 matches

How it works

The tool compiles your pattern in the browser and previews the result without ever modifying the input. Literal mode escapes every special character, so what you type is matched exactly. Regular-expression mode reports invalid patterns as a friendly, specific message instead of failing silently. All processing happens locally — no text is uploaded.

Related tools

  • Regex TesterTest regular expressions live against sample text and see every match, capture group and error highlighted in your browser.
  • Regex BuilderBuild regular expressions from reusable blocks with a live match preview — entirely in your browser.
  • Capture Group VisualizerSee the capture groups, nesting and matched text of any regular expression highlighted as you type.
  • Log Pattern ExtractorDevelop and test regex extraction patterns against groups of log lines, entirely in your browser.
  • Regex ExplainerBreak a regular expression into understandable components and flags, then test it against sample text in your browser.
  • Regex Flavor ComparatorPaste a regular expression to see which constructs differ across JavaScript, Python, PHP/PCRE, Java, .NET, Ruby, Go and Rust.

More Text & Regex tools