Developer Tools
Format JSON, encode/decode Base64, and help with daily developer tasks.
Code Utilities
8 toolsJSON Formatter
Format, validate, prettify, and minify your JSON data quickly.
Regex Tester
Test regular expressions live with match highlighting, flags, and group capture support.
Markdown Previewer
Write Markdown and see a live rendered preview side by side. Supports headings, lists, code, and more.
CRON Expression Builder
Build, validate, and understand CRON expressions with a visual editor and human-readable descriptions.
JSON ? CSV Converter
Convert JSON arrays to CSV and CSV files back to JSON with type inference and file download.
Text Diff Checker
Compare two blocks of text side-by-side to highlight differences.
JSON to TypeScript Generator
Convert JSON payloads into strongly-typed TypeScript interfaces locally.
AI Prompt Token & Cost Estimator
Estimate prompt tokens and calculate API usage costs for OpenAI, Claude, and Gemini.
Encoding & Crypto
11 toolsPassword Strength Checker
Analyze how secure your password is and generate a strong one instantly.
Binary ? Text Converter
Convert plain text to binary code and decode binary back to readable text.
Text to Binary Converter
Convert letters and strings into computer binary format.
Hex ? ASCII Converter
Convert text to hexadecimal and decode hex strings back to readable ASCII text.
Number System Converter
Convert numbers between binary, octal, decimal, and hexadecimal instantly with grouped display.
File Hash Checker
Generate and verify SHA-1, SHA-256, SHA-384, and SHA-512 hashes for files and text locally.
Hash Generator
Generate SHA-1, SHA-256, and SHA-512 cryptographic hashes.
JWT Decoder
Decode JSON Web Tokens (JWT) perfectly securely.
Base64 Encoder / Decoder
Encode plain text into Base64 format or decode it back instantly.
Bcrypt Hash Generator & Verifier
Generate Bcrypt password hashes or verify them locally inside your browser.
Secure Local Password Generator
Create cryptographically secure random passwords locally.
Design Helpers
4 toolsCSS Unit Converter
Convert between CSS units: px, rem, em, pt, vw, vh, cm, mm, and inches.
Aspect Ratio Calculator
Calculate aspect ratios, missing dimensions, and simplify ratios for any image or screen size.
Local SVG Optimizer
Minify and optimize SVG graphics entirely in your browser without uploads.
Tailwind CSS Palette Generator
Generate beautiful Tailwind CSS color palettes and config blocks.
Build & Deploy
5 toolsQR Code Generator
Create and download customized QR codes for URLs, text, and contacts.
UUID v4 Generator
Generate cryptographically secure Version 4 UUIDs instantly.
URL Encoder / Decoder
Safely encode URI components or decode gibberish URLs into readable strings.
UTM Link Builder
Generate trackable campaign links for analytics.
.env Syntax Validator
Validate environment variable syntax and detect credentials leaks locally.