HTML Markup Validator
Validate HTML markup for structure, SEO meta tags, accessibility, deprecated elements, Open Graph, Schema markup, and more — supports URL, source code, and file upload modes.
Use ToolDeveloper Tools
Streamline your development workflow with essential coding utilities.
Format code, validate JSON, test regex patterns, and convert between data formats—all in one place.
Our developer tools help you debug faster, write cleaner code, and automate repetitive tasks.
From CSS minification to UUID generation, every utility is designed to be fast, accurate, and available offline-friendly in your browser.
17 tools available
HTML Formatter Industry Editions
The HTML Formatter (Beautifier) is available in industry-specific editions: eCommerce, Healthcare, Education, Real Estate, Tech, Bloggers, Restaurants, and Local Business. Each edition is tailored to the specific markup patterns and formatting needs of that industry.
Redirection Manager
Full-featured redirect management dashboard with 301/302/307 redirects, bulk import, 404 tracking, analytics, loop detection, and SEO controls.
Use Tool
HTTP Header Checker
Inspect HTTP response headers for websites — analyze security, cache, server info, content type, redirects, and more with bulk URL support.
Use Tool
Cron Expression Generator
Build cron expressions visually with presets for common schedules, next run time predictions, and a syntax reference cheat sheet.
Use Tool
CSS Box Shadow Generator
Create custom CSS box shadows with a visual editor, multiple shadow layers, live preview, and one-click code export.
Use Tool
CSS Button Generator
Create custom CSS buttons with visual editor, shadow effects, hover effects, and gradient support.
Use Tool
Server Uptime Calculator
Calculate server uptime percentage from downtime hours. Check SLA compliance with monthly, yearly, or custom periods. Features a visual health gauge and detailed availability reports for hosting providers and IT professionals.
Use Tool
JSON Formatter & Validator
Validate and format JSON.
Use Tool
HTML Formatter (Beautifier)
Beautify and format HTML code.
Use Tool
CSS Formatter (Beautifier)
Beautify and format CSS code.
Use Tool
JavaScript Formatter
Beautify and format JavaScript code.
Use Tool
Code Minifier (HTML/CSS/JS)
Minify HTML, CSS, or JavaScript from one place.
Use Tool
Code Beautifier (All-in-One)
All-in-one beautifier for HTML/CSS/JS.
Use Tool
HTML to Text Converter
Extract plain text from HTML.
Use Tool
Text to HTML Converter
Convert plain text into HTML-safe output.
Use Tool
Markdown to HTML Converter
Convert markdown to HTML.
Use Tool
HTML Encoder / Decoder
Encode and decode HTML entities.
Use ToolGetting Started with Developer Tools
Developer tools are designed for quick, reliable code manipulation.
Paste your code into the input field, select the desired output format or transformation, and receive formatted or converted results immediately.
Many tools include syntax validation that highlights errors in red.
Supported formats include JSON, XML, HTML, CSS, JavaScript, and base64.
Results appear in a read-only output pane that supports one-click copying.
Industry-Specific Editions
Most tools in this category are available in industry-specific editions tailored to your field.
HTML Markup Validator for Ecommerce · Redirection Manager for Local Business · HTTP Header Checker for Bloggers · Cron Expression Generator for Real Estate · CSS Box Shadow Generator for Healthcare
CSS Button Generator for Education · Server Uptime Calculator for Tech · JSON Formatter & Validator for Restaurants · HTML Formatter (Beautifier) for Social Media · CSS Formatter (Beautifier) for Startups
JavaScript Formatter for Nonprofits · Code Minifier (HTML/CSS/JS) for Photography · Code Beautifier (All-in-One) for Gaming · HTML to Text Converter for Fitness · Text to HTML Converter for Finance
Markdown to HTML Converter for Legal · HTML Encoder / Decoder for Travel