Regex & Text

Regex for Numbers

Numeric regexes validate text shapes, not arithmetic meaning. Define whether signs, decimal points, leading zeroes, or surrounding text are allowed.

Published

Requirement builder

Choose the numeric text you allow

The preset shows its pattern and both passing and failing lines in the actual Regex Tester.

Selected preset

Find digit runs

This searches for digits anywhere inside a larger string.

\d+

Expected result: Finds 12 and 2048 inside the sample text.

Boundary choice

Search inside text or validate the entire value?

\d+Search

Finds a numeric fragment inside a larger string.

^\d+$Validate

Requires the complete line to contain digits.

Practice with the full tool

Test your numeric regex

Try your own integers, signs and decimal formats against the complete pattern.

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