RegExr vs BrowserUtils

RegExr is a free, open-source web app from gskinner for writing and testing regular expressions in JavaScript or PCRE flavor. It includes a cheatsheet, a full reference, a tests mode and a library of community patterns.

Quick comparison

FactRegExrBrowserUtils
Runs whereBrowser and serverIn the browser (1 tool needs a server and is labeled)
Sign-upOptionalNot needed
AdsSomeNo third-party ads (one small note per page about our own products)
PlatformWebWeb, works on mobile
Open sourceYesNo
PriceFreeFree
Tools1 tool299

Checked

Where RegExr is better

  • Switches between JavaScript and PCRE (PHP) flavors. BrowserUtils tests JavaScript regex only.
  • Tests mode keeps a suite of strings that should or shouldn't match and shows which pass as you edit the pattern.
  • Saving a pattern gives you a shareable link, and you can search and rate Community Patterns other people have published.
  • Replace and List tools show substitution output next to the matches, and hovering any token or match explains it inline.

Where BrowserUtils is better

  • Regex Visualizer draws the pattern as a railroad diagram with a plain-English breakdown. RegExr has no diagram view.
  • Every regex tool runs on your browser's own RegExp, and nothing is posted to a server. RegExr runs PCRE-mode matching on its server, and saving uploads the pattern and test text.
  • No ad slot. RegExr shows a sponsored placement (BuySellAds, with Carbon as fallback).
  • Separate tools for each step: a Regex Explainer for a plain-English reading, a Regex Pattern Generator with presets (email, URL, IPv4, UUID, dates) and Find and Replace with regex support.

Tools on both

Regex Tester
Test and debug regular expressions with live matching
Regex Explainer
Get plain English explanations of regex patterns
Regex Cheatsheet
Regex syntax quick reference

Try BrowserUtils, free.

299 tools. No sign-up. Almost all of them run entirely in your browser.

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