Developer Tools

JSON formatters, diff tools, browser code helpers, and API payload utilities.

JSON Diff Compare

Compare two JSON documents in your browser. See added, removed, and changed paths, then copy a JSON Patch style summary.

Cron Expression Calculator

Build a five-field cron expression visually and see the next five run times from your browser.

Bulk Domain Availability Checker

Paste any text, pull every domain name out of it, and check DNS records to see which domains are already taken. Free, fast, and done in your browser before you spend time on whois.

URL Encoder and Decoder

Encode and decode URL text in your browser. Choose component, full URL, or form/query mode, repair common percent-encoding mistakes, and inspect parsed URL details.

Base64 Encoder Decoder

Encode and decode Base64 text in your browser with UTF-8, Base64URL, padding, wrapping, and line-by-line options.

JSON Editor

Paste, format, search, and edit JSON in text, tree, or table mode. Work in your browser and save recent JSON on this device.

JavaScript Beautifier

Format messy JavaScript with Prettier in your browser. Choose parser, width, indentation, quotes, semicolons, trailing commas, and embedded code handling.

JavaScript Minifier

Minify JavaScript in your browser. Remove comments and whitespace, keep license comments when needed, then copy or download the smaller code.