Free Developer Tools
Simple, fast tools for everyday development tasks. No sign-up required.
Text Data
JSON Formatter
Format, validate, and minify JSON data with real-time validation as you type.
Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 back to text in real time. Useful for data URIs, API tokens, and more.
URL Encoder/Decoder
Encode or decode URL components and full URLs instantly. Essential for query string debugging.
Text Diff Checker
Compare two blocks of text or code side by side. See additions, deletions, and changes highlighted.
Timestamp Converter
Convert UNIX timestamps to human-readable dates and vice versa. Auto-detects seconds vs milliseconds.
Markdown Editor
Write and preview Markdown with a full-featured editor. GitHub-Flavored Markdown and live HTML preview.
Regex Tester
Test and debug regular expressions with real-time match highlighting. Supports flags, groups, and common presets.
Cron Generator
Build cron expressions with structured inputs and instant human-readable explanations. Includes common presets.
UUID Generator
Generate UUID v4 identifiers instantly. Bulk generation up to 500, formatting options, and one-click copy.
CSV ↔ JSON
Convert CSV to JSON or JSON to CSV with header detection, delimiter options, and malformed input handling.
Case Converter
Transform text between camelCase, snake_case, kebab-case, PascalCase, and more. Processes each line independently.
Security
Css Ui
Color Converter
Convert between HEX, RGB, and HSL color formats with live preview. Alpha channel support and CSS variable output.
CSS Gradient Generator
Create beautiful CSS gradients with live preview. Linear and radial gradients with color stops editor.
Box Shadow Generator
Design CSS box-shadows visually with offset, blur, spread, and color controls. Live preview and instant CSS.
CSS Unit Converter
Convert between CSS units: px, rem, em, and percent. Configurable base font size with common values.
Border Radius Generator
Generate border-radius CSS with per-corner or unified controls. Presets for pill, circle, soft card shapes.
CSS Button Generator
Design CSS buttons with hover, active, and disabled states. Full control over colors, padding, borders, and typography.
Glassmorphism Generator
Create glassmorphism UI effects with backdrop blur, transparency, and soft borders. Real-time preview with gradient backgrounds.
Neumorphism Generator
Design neumorphic (soft UI) effects with dual box-shadows simulating depth from adjustable light source.
CSS Animation Generator
Generate CSS transitions and keyframe animations. Choose properties, set duration/easing/delay, and get instant CSS.
Seo
Meta Tags Preview
Preview how your page appears in Google search results. Paste HTML to extract title, description, and meta tags with SEO recommendations.
Open Graph Preview
Preview social media cards when content is shared on Facebook, Twitter, and LinkedIn. Extract Open Graph tags from HTML.
Robots.txt Generator
Generate and validate robots.txt files. Control crawler access with User-agent, Allow/Disallow rules, and sitemap directives.