Welcome to DevUtils
Essential developer tools. 100% Client-side. Offline ready. No tracking.
JSON Tools
Format, validate, and minify JSON data with intelligent error highlighting.
HTTP Request Builder
Construct API requests with params, auth, and body. Export to cURL, Fetch, and Axios.
Password Generator
Create strong passwords or diceware passphrases with entropy analysis.
YAML Converter
Convert between YAML and JSON with validation and live preview.
Unix Timestamp
Convert between Unix timestamps and human-readable dates. Real-time clock included.
JWT Debugger
Decode JSON Web Tokens to inspect headers, payloads, and signatures.
Markdown Editor
Write Markdown with real-time preview. Export to HTML or print-ready PDF.
String Inspector
Analyze character counts, bytes (UTF-8), word distribution, and Unicode points.
World Clock
Plan meetings across timezones with a visual 24-hour grid comparison.
JSON Graph
Visualize JSON objects as interactive node graphs. Perfect for understanding structure.
JSON to Types
Convert JSON to TypeScript, Go, Java, Kotlin, Rust, Dart, Python, and C# models.
Color Picker
Advanced OKLCH color picker with P3 support, palettes, and contrast checking.
Image Compressor
Compress and convert images (PNG, JPEG, WebP) locally. High performance.
Fake Data Generator
Generate Lorem Ipsum text or structured mock data (JSON/CSV) for testing.
Diff Viewer
Compare text, JSON, or code side-by-side to identify differences quickly.
URL Tools
Parse, build, encode, and decode URLs with an interactive query builder.
QR Code Generator
Create customizable QR codes for URLs, text, and Wi-Fi credentials instantly.
Hash Generator
Calculate SHA-256, SHA-512, and other hashes from text or files securely.
Regex Tester
Test regular expressions against text with real-time highlighting and explanations.
CSV Converter
Convert CSV to JSON and vice versa. Supports large files and file downloads.
Cron Generator
Create and decipher cron schedule expressions with plain English explanations.
Code Formatter
Prettify JS, TS, HTML, CSS, Markdown, and YAML using Prettier.
SQL Formatter
Beautify SQL queries with dialect support (MySQL, Postgres, etc.).
Code Minifier
Minify JavaScript, CSS, and HTML files offline.
UUID Generator
Generate RFC4122 version 4 UUIDs using cryptographically strong random values.
Base64 Converter
Encode and decode text or files to Base64 format securely in your browser.