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Generate a simple regex pattern from a small text rule set like digits, words, prefix, or suffix.
Use this simple Regex Generator to create a basic regex pattern from straightforward text rules instead of writing the expression manually. It is useful for beginners, quick validation patterns, test input matching, forms, lightweight parsing tasks, and building common regex structures such as digits only, letters only, prefix match, suffix match, contains text, or exact match.
Use this simple Regex Generator to create a basic regex pattern from straightforward text rules instead of writing the expression manually. It is useful for beginners, quick validation patterns, test input matching, forms, lightweight parsing tasks, and building common regex structures such as digits only, letters only, prefix match, suffix match, contains text, or exact match.
Use regex generator (simple) when you need a fast browser-based result without extra setup. It works well for quick checks, one-off tasks, and routine formatting or calculation work.
Read step-by-step usage guidance, best practices, and common mistakes.
See common questions and answers about input, output, and tool usage.
Review practical input and output examples before running the tool.
Find similar and supporting tools for adjacent actions and follow-up tasks.
Input
mode=digits
Output
/^\d+$/
Useful for basic numeric field validation.
Input
mode=startsWith value=INV-
Output
/^INV\-/
Useful when values must begin with a fixed prefix.
Fix: Provide a supported mode such as exact, contains, startsWith, endsWith, digits, letters, alphanumeric, or customLengthDigits.
Fix: Modes like exact, contains, startsWith, and endsWith require a value.
Fix: This page is for simple rule-based regex generation only.
Fix: Use a positive integer for rules like customLengthDigits.
Fix: The generator escapes regex-sensitive characters for literal-based modes.
It creates a basic regex pattern from simple rule-based input.
It supports simple modes like exact, contains, startsWith, endsWith, digits, letters, alphanumeric, and customLengthDigits.
No. This page is focused on simple generation, not advanced regex authoring.
You can use JSON or key=value lines.
Because it turns small matching rules into ready-to-copy regex without requiring manual regex writing.