🛠️ Developer Tools & Utilities

Free, fast, and privacy-focused tools to boost your productivity

Interactive Tools

🔍

Regex Tester

Test and debug regular expressions in real-time with match highlighting and explanations

Interactive
📋

JSON Formatter

Beautify, minify, and validate JSON data with syntax highlighting

Interactive

Cron Helper

Build and understand cron expressions with visual builder and plain English explanations

Interactive

Quick Utilities

📏

Unit Converter

Convert between length, weight, temperature, data sizes, time, and speed units

6 Categories
🔢

Character Counter

Count characters, words, lines, sentences, and paragraphs in real-time

Live Updates
🔑

UUID Generator

Generate v4 UUIDs for development, testing, and database records

Batch Generation
🔐

Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 strings back to readable text

Bidirectional
🎨

Color Picker

Pick colors, convert between HEX/RGB/HSL/HSV, and generate palettes

Palette Generator
📝

Markdown Preview

Write and preview Markdown with live rendering and GitHub-flavored syntax

Live Preview
🔐

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes

4 Algorithms
🔑

JWT Decoder

Decode and inspect JSON Web Tokens with header and payload display

Token Inspector
💻

SQL Formatter

Format and beautify SQL queries with support for multiple dialects

6 Dialects

Study 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 Practice
🍅

Pomodoro Timer

Stay focused with timed work and break cycles. Tracks daily session count, total focus time, and logs your history.

Focus Sessions

Code Playground

Live HTML, CSS, and JavaScript sandbox. Write code and see the result instantly — great for practicing techniques from cheat sheets.

Live Preview
📋

Study List

Build a personal learning backlog. Track topics as Todo, In Progress, or Done with priorities, notes, and progress stats.

Progress Tracking

Looking for cheat sheets?

Browse our ever-growing collection of developer reference guides

Browse Categories View All Sheets