Web & HTTP Toolkit

Web & HTTP

HTML live preview, regex tester, URL parser, user agent parser, IP lookup, HTTP status codes reference, htaccess, and meta tag generators.

HTML / CSS / JS

Live Preview

#html preview#regex#url parser#user agent#ip info#http status#htaccess#meta tags#open graph

What's included in Web & HTTP Toolkit

9 tools, all free and client-side — no login or data upload required.

HTML Live Preview

Write HTML, CSS, and JavaScript in a split-pane editor and see an instant live preview — no build step required.

Prototype UI components without a dev environment
Test CSS animations and transitions interactively
Share quick HTML demos without a hosting setup

Regex Tester

Test regular expressions against sample text with live match highlighting, group capture, and flag controls.

Debug and refine regex patterns before adding to code
Test email, URL, or phone number validation patterns
Explore regex capture groups interactively

URL Parser

Paste any URL and instantly extract its protocol, hostname, port, path, query parameters, and fragment.

Debug query string parameters in complex URLs
Extract domain and path components for routing logic
Analyze redirect chains and URL structures

User Agent Parser

Decode browser user agent strings to identify the browser family, version, OS, and device type.

Identify the browser from support tickets or logs
Debug device-specific rendering issues
Analyze user agent strings from server access logs

IP Address Info

Detect your public IP address and get geolocation data including country, region, city, and ISP.

Verify VPN or proxy IP addresses
Check IP geolocation for access control testing
Diagnose network connectivity issues

HTTP Status Codes

Complete reference for all HTTP 1xx–5xx status codes with descriptions, use cases, and RFC links.

Look up unfamiliar status codes during API development
Reference correct codes when designing API responses
Teach HTTP semantics to junior developers

.htaccess Generator

Generate Apache .htaccess rules for redirects, custom error pages, HTTPS enforcement, and access control.

Set up 301 redirects after migrating a website
Force HTTPS on Apache-hosted sites
Restrict access to directories by IP or password

Meta Tag Generator

Generate SEO-optimized HTML meta tags for title, description, robots, viewport, and charset.

Generate complete meta tag sets for new web pages
Improve on-page SEO for blog posts
Ensure correct viewport meta tags for mobile-first design

Open Graph Tag Generator

Build Open Graph meta tags for social media sharing on Facebook, Twitter, LinkedIn, and Slack.

Control how links preview when shared on social media
Add og:image and og:description to blog posts
Optimize link previews for marketing campaigns

About Web & HTTP Toolkit

The Web & HTTP Toolkit is built for front-end and API developers. Write and preview HTML/CSS/JS in a split-pane editor, test regular expressions with live match highlighting and capture group inspection, parse any URL into its components, decode user agent strings to identify browsers, and look up HTTP status codes with descriptions and RFC links.

Meta Tag and Open Graph generators produce copy-paste-ready HTML for SEO and social sharing, while the .htaccess generator creates Apache rewrite and redirect rules for common scenarios. The HTML Live Preview is a full sandbox: paste any markup and see it render instantly, making it perfect for prototyping without a dev environment.

Every tool runs in the browser, and no URLs, user agents, or HTML content is transmitted anywhere. The IP Info tool is the one exception: it fetches your public IP and geolocation from a public API, because that data is not available from within the browser alone.

How to use Web & HTTP Toolkit

1
Pick a web tool
Choose a tab: HTML Preview, Regex, URL Parser, User Agent, IP Info, HTTP Status, htaccess, Meta Tags, or Open Graph.
2
Enter input
Paste HTML, a regex pattern, a URL, a user agent string, or fill in form fields for tag generators.
3
Iterate live
Most tools update as you type. Regex matches highlight instantly, meta tags regenerate on every field change, and HTML preview re-renders.
4
Copy the result
Copy generated tags, parsed URL components, or regex matches. Clear the input to discard everything.

Frequently asked questions

Is the Regex Tester compatible with my server-side language?

It uses JavaScript regex syntax (ECMAScript), which is very close to PCRE but with some differences around lookbehind, named groups, and Unicode properties. Patterns that work here will usually work in Python, Java, and Go with minor adjustments.

How accurate is the User Agent Parser?

It correctly identifies over 99% of modern browsers (Chrome, Firefox, Safari, Edge, Opera), operating systems (Windows, macOS, Linux, iOS, Android), and device types. Obscure or spoofed user agents may be misclassified.

Does the HTML Live Preview execute JavaScript safely?

Yes. Your HTML is rendered inside a sandboxed iframe with no access to the parent page, cookies, localStorage, or network. You can safely test code snippets without risk of affecting other tabs.

Can the Meta Tag Generator output tags for Twitter Cards?

Yes. The Open Graph Tag Generator produces og: properties plus twitter:card, twitter:title, twitter:description, and twitter:image tags for Twitter/X link previews.

Does the IP Info tool expose my real IP?

It shows your public-facing IP address — the same IP any website would see when you visit. If you use a VPN or proxy, it shows that IP, not your home IP. The tool does not store or log your IP.

Are the HTTP status codes up to date with recent RFCs?

Yes. The reference includes all codes from RFC 9110 (the current HTTP semantics spec), including modern additions like 103 Early Hints, 421 Misdirected Request, and 451 Unavailable For Legal Reasons.