Developer Tools
12 free tools tagged with "developer"
Developer Tools
(9)Cron Expression Builder
Build and understand cron expressions with an interactive visual editor. Click to set schedules, see plain-English translations and next run times.
QR Code Generator
Generate QR codes for website URLs and plain text. Download as PNG or SVG with custom colours. Free, instant, no sign-up required.
Image to Base64 Converter
Convert any image to a Base64 encoded string or data URI online for free. Supports PNG, JPG, and WebP output formats. Copy with one click.
Base64 to Image Converter
Convert a Base64 string or data URI back to a downloadable image. Auto-detects format, shows preview, and lets you download as PNG, JPG, or WebP.
JSON Prettifier
Format and pretty-print JSON with proper indentation online. Choose 2 spaces, 4 spaces, or tabs. Instant formatting with error detection and stats.
JSON Minifier
Minify JSON by removing all whitespace and formatting. See the size reduction instantly. Free online JSON compressor with copy button.
JSON Validator
Validate JSON syntax and find errors with line numbers online for free. Real-time validation as you type with detailed error messages and stats.
HTML Encoder / Decoder
Encode special characters to HTML entities or decode HTML entities back to text. Handles all named and numeric entities with live preview.
Markdown to HTML Converter
Convert Markdown to HTML code online for free. Supports headings, bold, italic, links, code blocks, lists, blockquotes, and more. Live preview included.
Unit Converters
(2)Date & Time
(1)Explore our collection of 12 free developer tools. Each tool works directly in your browser with no sign-up required. From calculators and converters to generators and planners - find the right tool for your needs and get results instantly.