Developer Kit
Essential browser-based tools every developer needs — from JSON formatting to regex testing, JWT decoding, and more. No installs, no signups, just productivity.
Formats and beautifies JSON data for better readability. Developers and data analysts use it to quickly debug and visualize JSON structures.
Open tool →Test regular expressions in real-time — paste your pattern and test string, see matches highlighted instantly with capture groups.
Open tool →Decode and inspect JSON Web Tokens instantly. View the header, payload and check expiry without any backend. 100% client-side.
Open tool →Encode text to Base64 or decode Base64 back to plain text. Supports UTF-8 and URL-safe variants.
Open tool →Decode Base64 text instantly in the browser.
Open tool →Encode text for safe use in URLs and query strings.
Open tool →Generate universally unique identifiers (UUIDs) in various versions for use in databases, session IDs, and more.
Open tool →Compare two pieces of text side by side and see exactly what changed. Essential for reviewing document edits, code changes, or any version comparison.
Open tool →Escape special characters in JSON strings — handles quotes, backslashes, newlines, and Unicode characters.
Open tool →Convert CSV data to JSON format instantly in your browser. Supports comma, semicolon, tab, and pipe delimiters. Auto-detects numbers.
Open tool →Build and validate cron expressions visually — select minutes, hours, days, months with a point-and-click interface.
Open tool →Minify HTML by removing comments, extra whitespace and optional tags. Safe compression for production websites.
Open tool →Beautify and format SQL queries with proper indentation, keyword uppercasing, and clause alignment. Supports SELECT, INSERT, UPDATE, DELETE, JOIN, and subqueries. Free online SQL beautifier.
Open tool →Paste any code snippet — JavaScript, Python, SQL, or any language — and get a clear, line-by-line explanation in plain English. Perfect for learning, code reviews, and understanding unfamiliar codebases.
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