How to Generate UUIDs (GUIDs) in JavaScript, Python & SQL
Learn how to generate Version 4 UUIDs in JavaScript, Python, and SQL. Includes code examples, storage tips, and our free Bulk UUID Generator for testing.
How to Test Regex (Regular Expressions) Online
Master Regular Expressions with our complete guide to testing regex patterns. Learn syntax, flags, and debugging techniques with our free online Regex Tester.
How to Trade In a Car with Negative Equity (Upside Down)
Owe more than your car is worth? Learn how to calculate negative equity, explore your options for rolling it into a new loan, and avoid common dealer traps.
How to Use a Case Converter for Text Formatting
Learn how to instantly transform text between uppercase, lowercase, sentence case, and title case. Includes grammar rules and our free online converter tool.
How to Write a Business Plan (Free Template & Generator)
Learn how to write a professional business plan step-by-step. Use our free generator to create an executive summary, SWOT analysis, and financial projections.
Purchasing Power of the Dollar (1913-2026): A Visual Guide
See how the purchasing power of the US Dollar has declined by 97% since 1913. A visual history of inflation with decade-by-decade data and wealth protection tips.
How to Convert XML to JSON (Methods & Best Practices)
Learn how to convert XML to JSON, including attribute mapping, array handling, CDATA, and common pitfalls. Practical guide for API migration and data processing.
How to Extract Email Addresses from Text (Methods & Tools)
Learn how to extract email addresses from text, documents, and HTML. Covers regex patterns, deduplication, CAN-SPAM compliance, and legitimate use cases.
How to Resize Images for Social Media (Every Platform)
Complete guide to optimal image sizes for Instagram, Facebook, Twitter, LinkedIn, and YouTube. Get exact pixel dimensions, aspect ratios, and quality tips.
How to Use a DNS Lookup Tool Effectively
Learn how DNS lookups work, what each record type means, and how to troubleshoot DNS issues. Covers A, AAAA, MX, TXT, CNAME, NS records and propagation timing.
How to Validate EU VAT Numbers (Formats & VIES Guide)
Learn how to validate EU VAT identification numbers. Covers country-specific formats, the VIES verification system, reverse charge rules, and post-Brexit UK rules.
How to Write a Business Memo (Format, Examples & Templates)
Master the business memo format with this complete guide. Covers memo structure, when to use memos vs email, tone advice, and templates for common scenarios.
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