CORS Headers Checker
Simulate browser CORS evaluation from request and response headers, including preflight detection.
Web
Inspect user agents, IP details, meta tags, and CSS gradients.
About Web
URL parsing, UserAgent analysis, HTTP status lookup, MIME type search, and other web development debugging tools.
Common use cases
- UserAgent analysis & debugging
- HTTP status code lookup
- CSS gradient generation
- URL parsing & decomposition
Popular Tools
All Web Tools (13)
User Agent Parser
Parse user agent strings to inspect browser, OS, and device details.
Meta Tag Generator
Generate SEO, Open Graph, and social sharing meta tags.
Email Normalizer
Normalize email addresses by lowercasing, stripping +tags, and removing Gmail dots, then detect duplicates.
URL Parser
Break a URL down into its protocol, host, path, query parameters, and more.
Query String Parser
Break a query string down into key-value pairs and view it as JSON.
Query String Builder
Build a URL-encoded query string from key-value pairs.
HTTP Status Code Lookup
A searchable quick reference for HTTP status code meanings.
MIME Type Lookup
A searchable quick reference for file extensions and MIME types.
Cookie Parser
Parse a cookie string into key-value pairs or individual attributes.
CORS Headers Checker
Simulate browser CORS evaluation from request and response headers, including preflight detection.
HTTP Header Builder
Build HTTP request headers from common presets and export as fetch, curl, or raw HTTP.
Curl to Fetch Converter
Convert a curl command into JavaScript fetch() code.
Basic Auth Header Generator
Generate or decode an HTTP Basic Authentication Authorization header from a username and password.