Web Developer Tools
Free online web development tools to encode and parse URLs, escape HTML entities, generate SEO meta/Open Graph tags, create slugs, convert cURL commands to fetch(), parse User-Agent strings, and shorten links. Everyday utilities for frontend and backend work.
10 tools in Web
CIDR Calculator
Calculate IPv4 network, broadcast, host range, and netmask from a CIDR block. Free subnet calculator in your browser.
cURL to Fetch
Convert a cURL command into a JavaScript fetch() call instantly online, for free. Perfect for copying requests from DevTools or Postman.
HTML Entities Encoder / Decoder
Encode and decode HTML entities like < and > instantly online. Free tool for safely embedding user content in HTML, emails, and templates.
HTTP Status Codes
Look up HTTP status codes from 1xx through 5xx. Search by code or name and copy the number instantly.
Meta Tag Generator
Generate SEO meta tags, Open Graph, and Twitter Card tags with live Google and social previews. Free meta tag generator — copy-ready HTML.
Slug Generator
Convert any text into a clean, URL-friendly slug instantly online. Free slug generator for blog post URLs, API routes, and file names.
URL Encoder / Decoder
Encode and decode URLs and query string parameters online, instantly. Supports value encoding, full URL encoding, and decoding — free tool.
URL Parser
Parse any URL into its components online — protocol, host, path, query params, and hash. Free URL parser for debugging redirects and OAuth callbacks.
URL Shortener
Shorten any URL online and get a free, shareable codinganthem.com/r/ link instantly. Optional link expiry and click tracking — no sign-up needed.
User-Agent Parser
Parse any User-Agent string into browser, engine, OS, and device details online. Free User-Agent parser for debugging logs and analytics data.