Developer guides
Format JSON and XML, convert CSV and Excel, and decode Base64 safely.
How to Decode Base64 Safely
Base64 is everywhere — emails, tokens, data URIs. Learn what it does and does not do, how to spot it, and how to decode it safely in one step.
How to Convert JSON to CSV
Turn JSON arrays into spreadsheet-ready CSV in your browser — columns from all keys, values correctly quoted, and a safe path into Excel or Google Sheets.
How to Convert CSV to Excel Without Losing Data
Opening a CSV directly in Excel can silently mangle phone numbers, IDs and dates. Convert it properly instead and keep every value exactly as written.
JSON vs XML: What's the Difference?
JSON and XML both structure data, but they reward different jobs. See the same data in both formats, compare their features, and learn when to reach for which.
How to Format JSON Online: A Beginner's Guide
Minified JSON is unreadable. Format it with proper indentation, validate it in the same click, and learn the five errors that break almost every JSON file.