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Development Essentials

Discover essential Development tools — all free, run locally, no sign-up required.

• 🔐 Base64 Codec Encode and decode text to/from Base64, supports Unicode
• ⏰ Cron Parser Parse cron expressions into human-readable descriptions and next run times
• 🖌️ CSS Formatter Format and minify CSS code with configurable indentation
• ⇄ CSV ↔ JSON Convert between CSV and JSON formats
• 🔍 File Type Detector Detect real file formats via magic bytes, spot disguised files
• 📁 Folder Structure Generator Parse indented or ASCII tree text into a directory tree and output Markdown/Tree/JSON/YAML.
• #️⃣ Hash Calculator Compute MD5/SHA-1/SHA-256/SHA-512 hashes for text or files
• 🏷️ HTML Entity Codec Encode/decode HTML entities: named, decimal, and hex formats
• 🌐 HTML Online Editor Live preview HTML code with device size simulation
• 🖼️ Image to Base64 Upload an image and get its Base64 encoding, supports reverse decode
• 🌐 IP/CIDR Calculator Calculate network address, broadcast, and host range from IP/subnet
• ✨ JS/TS Formatter Beautify JavaScript and TypeScript code using Prettier
• {} JSON Formatter Format, compress, and validate JSON
• 🔑 JWT Decoder Decode JWT token header and payload, show expiration time
• ↵ Line Ending Converter Convert between CRLF, LF, and CR line endings with auto-detection
• ✅ Markdown Validator Check Markdown document for format issues: heading levels, links, etc.
• 🌐 HTTP Request Simulate HTTP requests online with GET/POST/PUT/DELETE and more. Custom headers, params, body, and auth.
• 🔢 Number Base Converter Convert numbers between binary, octal, decimal, and hexadecimal
• 🔒 Password Generator Generate secure random passwords with custom length and character sets
• ▣ QR Code Tool Generate, decode, and scan QR codes with custom colors and error correction
• .* Regex Tester Test regular expressions with real-time match highlighting, plus AI generation from plain language
• 🗄️ SQL Formatter Format and compress SQL across multiple database dialects, plus AI-powered plain-language SQL explanation
• 🗄️ Table to SQL Paste CSV or JSON data and generate INSERT INTO SQL statements
• 🔑 Text Cipher ROT13, Caesar cipher, and AES encryption/decryption tools
• 🕐 Timestamp Converter Convert Unix timestamps to/from readable dates, seconds or milliseconds
• 🔤 Unicode Escape Convert between \\uXXXX escape sequences and original characters
• 🔗 URL Codec URL encode and decode using encodeURIComponent
• 🪪 UUID Generator Batch generate UUID v4/v7 in multiple formats with one-click copy
• 📄 XML Formatter Format, compress and validate XML with custom indentation
• ⇄ YAML ↔ JSON Convert between YAML and JSON formats in both directions

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🔄 Convert📝 Text🎬 Media👁️ Preview🧰 Utility🛜 Collab🎮 🕹️ Games✨ Fun

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