Regex Match Lab
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Description
Build, test, and reuse regular expressions without sending your text anywhere.
TEST PATTERNS LIVE
Enter a pattern and sample text to see matches update as you work. Toggle ignore-case, per-line anchors, and dot-matches-newline options.
SEE EXACT MATCHES
Matched text is highlighted in place and plotted on a compact match map. Every result includes its exact source range.
INSPECT CAPTURE GROUPS
Open each match to see numbered capture groups, captured values, and ranges. Use the included email, log, and date examples as practical starting points.
PREVIEW REPLACEMENTS
Switch to Replace, enter an NSRegularExpression replacement template, and review the complete transformed text before using it elsewhere.
SAVE REUSABLE TESTS
Name useful pattern-and-sample combinations, update them, reopen them after relaunch, or share a plain-text result report.
BUILT FOR REAL WORK
The adaptive workbench fits iPhone and iPad. Large samples and result counts are bounded to keep previews responsive.
PRIVATE BY DESIGN
Tests stay locally on your device. There is no account, analytics, tracking, advertising, cloud upload, or server connection.