DevUtils Developer Tools & Utilities
Essential developer tools. 100% client-side. Offline ready. No tracking. Welcome to DevUtils.
JSON Tools
Format, validate, and minify JSON data with intelligent error highlighting.
URL Tools
Parse, build, encode, and decode URLs with an interactive query builder.
Base64 Converter
Encode and decode text or files to Base64 format securely in your browser.
JWT Debugger
Decode JSON Web Tokens to inspect headers, payloads, and signatures.
UUID Generator
Generate RFC4122 version 4 UUIDs using cryptographically strong random values.
Hash Generator
Calculate SHA-256, SHA-512, and other hashes from text or files securely.
Hex Converter
Convert text to hex and decode hex back to text. Includes decimal/hex/binary/octal base conversion.
Regex Tester
Test regular expressions against text with real-time highlighting and explanations.
Code Formatter
Prettify JS, TS, HTML, CSS, Markdown, and YAML using Prettier.
Code Minifier
Minify JavaScript, CSS, and HTML files offline.
SQL Formatter
Beautify SQL queries with dialect support (MySQL, Postgres, etc.).
YAML Converter
Convert between YAML and JSON with validation and live preview.
TOML Converter
Convert TOML to JSON and JSON to TOML.
CSV Converter
Convert CSV to JSON and vice versa. Supports large files and file downloads.
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.
Diff Viewer
Compare text, JSON, or code side-by-side to identify differences quickly.
String Inspector
Analyze character counts, bytes (UTF-8), word distribution, and Unicode points.
Log Inspector
Inspect and filter JSON and Common Log Format (CLF) logs with level toggles and search.
API Docs Generator
Convert Postman Collection v2.1 or OpenAPI v3 (JSON/YAML) into a single HTML documentation page.
HTTP Request Builder
Construct API requests with params, auth, and body. Export to cURL, Fetch, and Axios.
Link Preview
Generate meta tags & preview social cards.
Color Picker
Advanced OKLCH color picker with P3 support, palettes, and contrast checking.
CSS Unit Converter
Convert between px, rem, em, %, vw, and more.
CSS Grid Generator
Visually build CSS Grid layouts and export CSS + HTML for grid-template, gaps, and grid-area.
SVG Editor
View, optimize, edit, and transform SVG code.
Markdown Editor
Write Markdown with real-time preview. Export to HTML or print-ready PDF.
QR Code Generator
Create customizable QR codes for URLs, text, and Wi-Fi credentials instantly.
Password Generator
Create strong passwords or diceware passphrases with entropy analysis.
Fake Data Generator
Generate Lorem Ipsum text or structured mock data (JSON/CSV) for testing.
Cron Generator
Create and decipher cron schedule expressions with plain English explanations.
Unix Timestamp
Convert between Unix timestamps and human-readable dates. Real-time clock included.
World Clock
Plan meetings across timezones with a visual 24-hour grid comparison.
Internet Speed Test
Estimate download speed and latency in-browser.
Image Compressor
Compress and convert images (PNG, JPEG, WebP) locally. High performance.