Developer Tools
Essential client-side developer utilities designed for productivity and security. Format, minify, and validate JSON responses, encode and decode Base64 strings safely with UTF-8 support, and test regular expressions in real time without external telemetry.
Strictly Client-Side
Code, tokens, and payloads never hit a remote server.
Instant Validation
Immediate syntax highlighting and error localization.
Production Ready
Copy clean output with one click directly into your codebase.
Available Developer Tools (3)
Select any tool to start using it instantly in your browser.
JSON Formatter
Beautify, validate, minify, sort keys, and inspect JSON with interactive tree view.
Base64 Encoder / Decoder
Encode and decode Base64 with URL-safe format, Data URIs, and live image preview.
Regex Tester
Test, debug, and replace regular expressions in real-time.
Developer Tools Guides & Tutorials
In-depth articles and guides related to developer tools.
JSON vs YAML vs TOML: Syntax Trade-offs, Parsing Performance, and Security Benchmarks
Compare JSON, YAML, and TOML data serialization formats. Learn parsing speed benchmarks, indentation pitfalls, security risks, and best use cases for 2026.
Regex for Email Validation: Why RFC 5322 Patterns Fail in Practice and Safe Practical Solutions
Learn how to validate email addresses with regular expressions. Understand the official RFC 5322 standard, catastrophic backtracking risks, and practical regex patterns.
How to Base64 Encode and Decode UTF-8 Strings in JavaScript Without atob and btoa Encoding Errors
Fix the classic JavaScript 'Character Out of Range' atob and btoa error. Learn modern TextEncoder and TextDecoder techniques for international UTF-8 Base64 strings.
Base64 Data URLs for Web Images: Performance Overhead, Caching Trade-offs, and When to Use Them
Learn how Base64 image encoding works. Understand the 33% payload size penalty, browser caching trade-offs, and when inlining data URIs improves Core Web Vitals.