Developer Tools
Hash Generator
Generate SHA-1, SHA-256, SHA-384, SHA-512 hashes from text
Password Generator
Generate strong, random passwords
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates
Cron Expression Generator
Build and understand cron schedule expressions
Chmod Calculator
Convert between numeric and symbolic Unix file permissions
String Escape / Unescape
Escape and unescape strings for JSON, HTML, URL, XML, CSV, SQL
IP Subnet Calculator
Calculate subnet ranges, broadcast addresses, and CIDR notation
Color Code Converter
Convert colors between HEX, RGB, and HSL formats
CSV ↔ JSON Converter
Convert between CSV and JSON formats
XML ↔ JSON Converter
Convert between XML and JSON formats
SQL Formatter
Format and minify SQL queries
Markdown Table Generator
Convert CSV/TSV data into formatted Markdown tables
HTTP Status Code Reference
Look up HTTP status codes with descriptions and usage
Meta Tags Generator
Generate HTML meta tags, Open Graph, and Twitter Card tags
Robots.txt Generator
Create robots.txt files with AI crawler blocking options
.gitignore Generator
Generate .gitignore files for popular frameworks
HTML Formatter
Beautify or minify HTML code with proper indentation
CSS Unit Converter
Convert between px, rem, em, pt, %, vw, and vh
JSONPath Evaluator
Query JSON data using JSONPath expressions
Text Diff Checker
Compare two texts and highlight differences
Data URI Converter
Encode text to Data URIs or decode Data URIs to text
Lorem Ipsum Generator
Generate placeholder text, code snippets, names, and emails
Path Converter
Convert between Windows backslash and Unix forward-slash paths
.htaccess Generator
Generate Apache .htaccess rules for redirects, caching, and security
.env Validator
Validate, sort, and compare .env environment files
Placeholder Image Generator
Generate placeholder image URLs for development and design
Learn Developer Tools
Key concepts and practical guides to level up your workflow.
📖 용어집
A flow control mechanism where a slow consumer signals a fast producer to reduce its …
A binary-to-text encoding that excludes visually ambiguous characters (0, O, I, l), used in Bitcoin …
A development practice where code changes are automatically built, tested, and deployed to production.
A notation for IP address ranges using a base address and prefix length (e.g. 192.168.1.0/24).
A mechanism where the client and server agree on the best representation of a resource …
A string format representing a schedule using five fields: minute, hour, day, month, and day …
A message queue that stores messages that could not be processed successfully, enabling later inspection …
A tree representation of the syntactic structure of source code, used by compilers and code …
📘 가이드
Configuration files are the backbone of modern applications. JSON, YAML, and TOML each offer different trade-offs between readability, complexity, and tooling support that affect your …
Video codecs determine file size, quality, and compatibility. This guide compares the major codecs, from the ubiquitous H.264 to the next-generation AV1, to help you …
QR codes bridge physical and digital experiences, but poorly generated codes fail to scan. This guide covers sizing, error correction, design customization, and testing best …
Data exchange formats serve different needs. CSV excels at tabular data, JSON dominates web APIs, and XML powers enterprise integrations. This comparison helps you choose …
Explore All Peasy Tools
15 specialized sites — one easy-peasy family.