Interactive Tools
Regex Tester
Test and debug regular expressions in real-time with match highlighting and explanations
InteractiveJSON Formatter
Beautify, minify, and validate JSON data with syntax highlighting
InteractiveCron Helper
Build and understand cron expressions with visual builder and plain English explanations
InteractiveQuick Utilities
Unit Converter
Convert between length, weight, temperature, data sizes, time, and speed units
6 CategoriesCharacter Counter
Count characters, words, lines, sentences, and paragraphs in real-time
Live UpdatesUUID Generator
Generate v4 UUIDs for development, testing, and database records
Batch GenerationBase64 Encoder/Decoder
Encode text to Base64 or decode Base64 strings back to readable text
BidirectionalColor Picker
Pick colors, convert between HEX/RGB/HSL/HSV, and generate palettes
Palette GeneratorMarkdown Preview
Write and preview Markdown with live rendering and GitHub-flavored syntax
Live PreviewHash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes
4 AlgorithmsJWT Decoder
Decode and inspect JSON Web Tokens with header and payload display
Token InspectorSQL Formatter
Format and beautify SQL queries with support for multiple dialects
6 DialectsStudy Tools
Flashcard Studio
Create decks, add cards, and study with a flip-card interface. Tracks what you got right and re-queues missed cards automatically.
Spaced PracticePomodoro Timer
Stay focused with timed work and break cycles. Tracks daily session count, total focus time, and logs your history.
Focus SessionsCode Playground
Live HTML, CSS, and JavaScript sandbox. Write code and see the result instantly — great for practicing techniques from cheat sheets.
Live PreviewStudy List
Build a personal learning backlog. Track topics as Todo, In Progress, or Done with priorities, notes, and progress stats.
Progress TrackingLooking for cheat sheets?
Browse our ever-growing collection of developer reference guides