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OneClickUse
Converters Tool

Regex Tester

Test regular expressions live with match highlighting, groups, and replace preview.

Privacy-first workflows
Fast and simple
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//g
Matches (2)
Reach us at hello@oneclickuse.com or support@example.org for help.
Replaced output
Reach us at [hello at oneclickuse.com] or [support at example.org] for help.
Captured groups
Match #1: hello@oneclickuse.com at index 12
$1 = hello
$2 = oneclickuse.com
Match #2: support@example.org at index 37
$1 = support
$2 = example.org
How it works

How to test regex

STEP 01
Type your pattern (without slashes).
STEP 02
Toggle flags (g, i, m, s, etc.) and paste a test string.
STEP 03
Matches are highlighted; capture groups are listed; try replacements with $1, $2 syntax.
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FAQ

Common questions