Developer Tools — authentools.com

Markdown Editor / Previewer Write Markdown and see it rendered live, side by side — export as HTML when you're done. Developer Tools Use Now → UUID Generator Generate random UUIDs (v4) in bulk, with multiple formatting options. Developer Tools Use Now → CSV to JSON Convert CSV data into JSON format, correctly handling quoted fields, commas, and special characters. Developer Tools Use Now → JS Minifier Minify JavaScript by shortening variable names and removing unnecessary code — reducing file size safely. Developer Tools Use Now → CSS Minifier Minify CSS by removing whitespace, comments, and applying safe optimizations — reducing file size without changing behavior. Developer Tools Use Now → Regex Tester Test regular expressions against your own text with live match highlighting and capture group details. Developer Tools Use Now → Hash Generator Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes for text or files, instantly in your browser. Developer Tools Use Now → URL Encoder/Decoder Encode or decode URLs and URL components, safely handling spaces, symbols, and special characters. Developer Tools Use Now → Base64 Encoder/Decoder Encode text to Base64 or decode Base64 back to readable text, with full support for special characters and emoji. Developer Tools Use Now → JSON to CSV Convert a JSON array of objects into a downloadable CSV file, ready to open in Excel or Google Sheets. Developer Tools Use Now →