Developer & Code StudiosRuns locally in your browser · No signup

Regex & Glob Pattern Studio

Test ECMAScript regular expressions with live capture groups and substitutions, inspect deterministic token-by-token regex explanations, and match .gitignore/bundler glob patterns.

100% Local Browser Engine · Zero Uploads3 Workspaces

Live RegExp Tester & Replace: Test JavaScript regular expressions with real-time match highlighting, named/numbered capture groups, substitution preview, and JS/Python/Go snippets.

Regular Expression
//gi
Test String & Live Highlighting
Highlighted Matches2 matches
Release v2.4.1 deployed on 2026-10-24 at 14:35 UTC Support: ops@acme.dev | Billing: billing@acme.dev Docs: https://docs.acme.dev/guides/webhooks Gateway IP: 192.168.1.42 · Theme accent: #2563eb
Matches & Capture Groups
Showing 2 match(es) with offsets and groups
#1index 60..72 (12 chars)
ops@acme.dev
Named Groups:
user: opsdomain: acme.dev
#2index 84..100 (16 chars)
billing@acme.dev
Named Groups:
user: billingdomain: acme.dev
Was this tool helpful?

What is Regex & Glob Pattern Studio?

Regex & Pattern Studio combines live ECMAScript RegExp testing (highlighting, named/numbered capture groups, substitution, JS/Python/Go snippets) with a token-by-token regex explainer and a file-path Glob (*, **, ?, {a,b}) matcher.

How to use Regex & Glob Pattern Studio in 3 steps
  1. 1

    Choose Live RegExp, Token Explainer, or Glob Matcher

    Enter a regular expression or a repository glob like src/**/*.{ts,tsx}.

  2. 2

    Inspect matches and capture groups

    Review match indices, replacement output, or path match badges in real time.

  3. 3

    Copy ready-to-use code

    Export validated patterns into your codebase or .gitignore / tsconfig config.

Key features and benefits
  • Tests both regular expressions and file-system glob patterns in one unified developer studio.
  • Breaks dense regex syntax into clear human-readable token explanations.
Common use cases

Debugging named capture groups for log parsing and route matching.

Verifying tsconfig, ESLint, and GitHub Actions file glob patterns against repo paths.

Why browser-based works better

Regex & Glob Pattern Studio consolidates related developer & code studios workflows into one cohesive, multi-mode browser studio — eliminating tab-hopping across fragmented single-purpose tools.

Every mode executes locally using Web APIs and audited client-side libraries, so private files, tokens, and source code never leave your device.

You might also need

Continue this workflow with nearby browser-based tools so you can validate, convert, and ship output without context switching.

Regex & Glob Pattern Studio FAQs

Quick answers about the workflow, privacy, and where this tool fits in a broader job.

Which glob wildcards are supported?

Single-segment *, recursive **, single-character ?, and brace alternation {ts,tsx}.

Related free tools

Keep the workflow moving with nearby tools that solve the next likely step.

Built and maintained by

Free AI Tools Engineering Team

Browser Tooling & Web Platform Engineering

Last updated:

Tested in Chrome, Firefox, and Safari on desktop and mobile.

Video demo

☕ Support Us