Blog
Tips, tutorials, and best practices for modern developers.
JavaScript Formatting Standards: Prettier, ESLint, and Best Practices
Format JavaScript code with industry-standard indentation, spacing, and structure. Align your codebase with Prettier and Airbnb style conventions.
IP Address Lookup: Geolocation, ISP Detection, and Security Checks
Look up any IP address for geolocation, ISP info, ASN, and security indicators. Essential for analytics, fraud detection, and access control.
Importing CSV Data into Web Applications as JSON
Convert CSV spreadsheet data to structured JSON for APIs and web apps. Automatic type detection, header mapping, and instant conversion.
Image to Base64: When to Inline and When to Link
Convert images to Base64 data URLs for embedding in HTML, CSS, and JSON. Understand the performance trade-offs of inlining vs external URLs.
HTTP Status Codes: The Complete Developer Reference Guide
Every HTTP status code explained with real-world examples and when to use each one. From 200 OK to 503 Service Unavailable.
HTTP Headers Decoded: Optimize Security and Performance in Minutes
Analyze HTTP request and response headers. Check security headers, caching policy, CORS configuration, and content negotiation.
HTML Meta Tags: Boost Your SEO and Social Sharing in 5 Minutes
Generate essential HTML meta tags for SEO, Open Graph, and Twitter Cards. Improve search rankings and social media link previews instantly.
HTML Entity Encoding: Your First Defense Against XSS Attacks
Encode and decode HTML entities to prevent XSS vulnerabilities. Learn which characters to encode and when escaping is critical.
How to Validate JSON and Fix the 5 Most Common Errors
Validate JSON syntax instantly and learn to fix trailing commas, missing quotes, and other common JSON errors. Free browser-based validator.
How to Generate Truly Secure Passwords: A Developer's Guide
Generate cryptographically secure passwords with configurable length, character sets, and entropy. Learn what makes a password uncrackable.
How to Convert JSON to CSV for Spreadsheets and Data Analysis
Transform JSON arrays into CSV format for Excel, Google Sheets, and data analysis. Free online converter with automatic column detection.
HMAC Signatures: Verify API Request Integrity Like Stripe Does
Generate HMAC signatures for webhook verification, API authentication, and message integrity. Learn how Stripe, GitHub, and AWS use HMAC.