Regex101

Instantly get a unique URL to inspect and debug webhooks. See incoming HTTP requests in real-time — headers, body, params. Essential for building and testing webhook integrations.

Search across half a million public GitHub repositories in real-time. Regex-powered code search with language filters. Find how real projects implement patterns. Results show the surrounding lines, so you can judge whether a pattern is idiomatic before copying it.

An interactive CHIP-8 emulator that runs in the browser, letting users load and run programs written for the classic 1970s virtual machine. It includes debugging tools for inspecting execution, making it useful for retro-computing enthusiasts and developers learning emulator internals or writing their own CHIP-8 programs.

A test and examples page for MarkSimple, a simple Markdown parser written in PHP. It shows how the parser renders various Markdown input, which helps developers evaluate the library before adopting it or verify its output while working on PHP projects that need Markdown rendering.

A sample order-tracking progressive web app created for the Pluralsight course Testing Progressive Web Apps. It simulates tracking customer orders for the fictional fitness retailer Carved Rock Fitness and serves as hands-on material for developers learning how to test progressive web app features.

The cron schedule expression editor. Type a cron expression and get a plain English explanation plus next execution times. Loved by every DevOps engineer and backend developer.