Developer tool category

Text & Code Tools

Use these tools when the problem is text rather than a structured data format. Test regular-expression behavior before replacing matches, or normalize words and identifiers into the naming style required by code, APIs, files, and documentation.

Common workflow

Where to start

5 recommended starting points

Step 1

Regex

Test regular expressions, inspect every match, and replace text with JavaScript RegExp syntax locally.

Open Regex

Step 2

Case Converter

Convert text between uppercase, lowercase, sentence case, title case, camelCase, PascalCase, snake_case, CONSTANT_CASE, dot.case, kebab-case, and URL slugs locally.

Open Case Converter

Step 3

Regex Tester

Check whether a JavaScript regular expression matches your sample text and catch invalid pattern syntax locally.

Open Regex Tester

Step 4

Regex Matcher

Find every regular-expression match and inspect match indexes, captures, and named groups as structured JSON.

Open Regex Matcher

Step 5

Regex Replacer

Preview JavaScript regular-expression replacements with capture groups and configurable flags before changing source text.

Open Regex Replacer

Primary utilities

Core tools

2 core tools

Text & Code

Case Converter Online – Change Text Case

Convert text between uppercase, lowercase, sentence case, title case, camelCase, PascalCase, snake_case, CONSTANT_CASE, dot.case, kebab-case, and URL slugs locally.

Task-specific entry points

Focused tasks

3 focused pages

Regex

Regex tasks

Test regular expressions, inspect every match, and replace text with JavaScript RegExp syntax locally.

Open Regex

Diagnose specific failures

Troubleshooting

1 topic hubs

24 focused fixes

Regex troubleshooting

Troubleshoot JavaScript regular-expression syntax, flags, anchors, quantifiers, groups, lookarounds, matching behavior, and replacements.

Understand the concepts

Related guides

1 guides