Web tools.

Inspect every hop, status code, and the final destination of a URL.

Check a URL’s final status, response time, content type, and redirects.

Inspect final response headers and common browser security policies.

Inspect verified TLS certificate identity, dates, cipher, and names.

Look up public A, AAAA, CNAME, MX, NS, TXT, and CAA records.

Look up domain, IP and ASN registration data directly from public RDAP services.

Resolve a hostname to its current public IPv4 and IPv6 addresses.

Parse browser HTTP Archive (.har) export logs locally — analyze network waterfalls, response status codes, and timing without uploading logs.

301 redirect rules for Apache .htaccess or nginx from old and new addresses.

SPF TXT records from the services that send your mail, with the 10-lookup limit checked.

DMARC TXT records with policy, reports, and alignment explained.

Paste raw email headers to see each server hop with its delay, and the SPF, DKIM, and DMARC results.

How long a file takes to download or upload at your connection speed, with protocol overhead, and the speed needed for a deadline.

Inspect link-preview metadata and see how a shared page may appear.

Find JSON-LD blocks, schema types, parse errors, and basic warnings.

JSON-LD for FAQs, how-tos, products, organisations, local businesses, articles, and events, checked against Google's required properties.

Inventory page titles, descriptions, directives, canonicals, and headings.

Compare a resolved page URL with its declared canonical signal.

Inspect language alternates, x-default, duplicates, and value shape.

Check meta and HTTP header signals for noindex and nofollow.

Generate Shopify title tags and meta descriptions with pixel-width SERP previews, reusable Liquid, and static HTML output.

Add UTM campaign parameters to links for Google Analytics, with presets, batch mode, and a QR code.

Read crawler rules, sitemap declarations, and accessibility at a glance.

Understand how a site's robots rules address known AI crawlers.

Validate XML or text sitemaps and inspect their URL coverage.

Inspect a site’s optional llms.txt structure, links, and source text.

Discover page links and safely check a bounded sample for failures.

Extract and classify up to 200 unique links from a public page.

Break a URL into protocol, host, path, query, fragment, and credentials.

Identify common browser, OS, device, engine, and bot signals locally.

robots.txt with rules per crawler, sitemaps, and presets including blocking AI training crawlers.

Build or edit URL query strings as encoded key and value rows.

Build a valid sitemap.xml from a list of URLs, split with an index past 50,000.

Preview a title and meta description in Google results, measured in pixels.

Word and phrase frequency and density, without stop words, in seven languages.

Write an llms.txt file for your site: a title, summary, and sections of links that language models can read.