Text Tools

Regex Tester

See matches and line-by-line results before using a pattern in an application.

PatternFlagsSample text

Matches

softkey-tools
release_2026

Line checks

Match: softkey-tools
Match: release_2026
No match: invalid value

Practical Guide

How teams use Regex Tester

Test a pattern against sample input to see exactly what matches before shipping a validator, parser, or search rule.

Common use cases

Verify capture behavior for email, slug, token, and log-line patterns.
Check how a pattern behaves against multiline text copied from logs or request traces.
Reproduce a bug report where a field passed or failed validation unexpectedly.

Checks before trusting the result

A passing test case is not enough; include negative examples that should fail.
Watch for greedy matches and unintended partial matches in long strings.
Keep flags and anchors aligned with the runtime where the pattern will actually execute.