Developer Utilities
Debug, transform,
and fix data
instantly.
21 browser-based tools. No login, no tracking, no server. Your data stays on your machine.
Base64
Encode and decode Base64 strings quickly.
URL Encoder
Encode and decode URLs for web applications.
JWT Debugger
Decode and verify JSON Web Tokens (JWT) instantly.
Timestamp
Convert between timestamps and human-readable dates.
String Case
Convert text between different case formats.
Color Hex
Generate and convert color hex codes.
String Diff
Compare two strings and see their differences.
JSON Editor
Edit, format, and validate JSON data with syntax highlighting.
Image to Base64
Convert images to base64 strings.
Base64 to Image
Convert base64 strings back to images.
JSON Formatter
Format, validate, and minify JSON data with syntax highlighting.
Hash Generator
Generate MD5, SHA1, SHA256, and SHA512 hashes from text.
CSS Gradient
Build linear, radial, and conic gradients with live preview.
HTML Renderer
Write or paste HTML with CSS and JS and see a live preview.
UUID Generator
Generate random UUID v4 strings in bulk. Copy one or all.
Random String
Generate secure random strings for API keys and passwords.
Number Base
Convert numbers between binary, octal, decimal, and hex.
Regex Tester
Test regular expressions with real-time match highlighting.
JSONL Validator
Validate JSON Lines and convert valid records to a JSON array.
Query Params → JSON
Parse URL query parameters into a structured JSON object.
Lorem Ipsum
Generate placeholder text by paragraphs, sentences, or words.
From the blog
All articles →Base64 Encoding: A Complete Developer Guide
From basic concepts to advanced use cases in web development and API communication.
JWT Token Debugging: Common Issues & Fixes
Decode, verify, and troubleshoot JSON Web Tokens with practical debugging techniques.
JSON Best Practices for Modern APIs
Structure, validate, and document JSON data for cleaner, more maintainable APIs.
Hash Algorithms: MD5 vs SHA — Which to Use?
A practical guide to choosing the right hashing algorithm for security and data integrity.
URL Encoding: The Complete Reference
Everything you need to know about percent-encoding and when to apply it correctly.
Unix Timestamps: Conversion & Timezone Handling
Work confidently with epoch time, timezones, and date formatting across platforms.