Free Online Web & SEO Tools

Extract link anchors from HTML and summarize descriptive, branded and generic text patterns.

Measure a URL response in your browser and display elapsed time, status and CORS/network limitations.

Summarize backlink anchor text counts and branded, generic and exact-match categories from pasted CSV.

Analyze a CSV export of backlinks: referring domains, link attributes, anchor text and duplicate source URLs. No backlink score is invented.

Create BreadcrumbList JSON-LD from a sequence of page names and absolute URLs.

Extract and classify links from pasted HTML; verify status by supplying a browser-accessible crawl report.

Parse Cache-Control directives, quoted values, duplicate directives and numeric freshness settings with practical interpretation hints.

Extract canonical link elements from pasted HTML and flag missing, duplicate or malformed values.

Inspect CSP directives, repeated directives and common risky source expressions in a pasted policy.

Parse Cookie request headers or separate Set-Cookie response lines into structured JSON without losing duplicate names.

Run a Google PageSpeed Insights audit and review Lighthouse performance plus available real-user Core Web Vitals.

Estimate pages crawled per day from crawl frequency and inventory; it is a planning model, not Google data.

Test a CSS selector against pasted HTML and inspect matching elements, text and attributes locally.

Build a POSIX-shell cURL command from a URL, method, JSON headers and request body. Quote arguments safely without sending the request.

Convert any cURL command to idiomatic JavaScript — fetch, axios, or XMLHttpRequest.

Look up domain registration events from public RDAP records where the registry provides them. Dates are not the same as a website launch date.

Summarize authority metrics in a pasted SEO-tool export. Domain Authority is proprietary; this tool does not fabricate a live score.

Generate an EAN-13 retail barcode as SVG from a 12- or 13-digit number and verify its check digit.

Check published SPF, DMARC and MX DNS records for a domain using Google DNS-over-HTTPS. This does not send a test email.

Unfold raw email headers, retain repeated fields and inspect Received order locally. No mailbox connection or message upload required.

Create a mailto link with a recipient, subject and prefilled email message.

Create a clean HTML email signature from your contact details and copy it into a compatible email client.

Decode UTM campaign parameters from a URL and display source, medium, campaign and content values.

Check whether Google’s public cached-page feature is available and build current indexed-page search links. Google retired its public cache links; no stale cache status is fabricated.

Build Google query strings using site, exact phrase, title, URL and exclusion operators.

Analyze HAR JSON locally: slow requests, HTTP errors, host counts and known response-body bytes. No requests are replayed.

Export requests from a browser HAR file to CSV to sort URLs, status codes, sizes and timings in a spreadsheet.

Analyze H1–H6 hierarchy from pasted HTML and flag missing or repeated heading levels.

Generate reciprocal hreflang link tags from language-region URLs and an optional x-default URL.

Generate Apache .htaccess redirect rules for HTTPS, host canonicalization and path redirects.

Convert HTML to JSX and back. Transforms class to className, style strings to objects, and more.

Extract forms, associated controls, labels, methods and action attributes from pasted HTML without submitting anything.

Pretty-print HTML with configurable indentation. Inline tags stay inline; block tags wrap.

Extract H1–H6 headings in document order and flag skipped levels or missing and repeated H1 headings.

Inspect pasted HTML for images with missing, empty or whitespace-only alt attributes and review image metadata locally.

Extract real HTML anchor URLs with link text, rel attributes and same-origin classification, resolving relative paths against an explicit base URL.

Strip whitespace, comments, and redundant attributes from HTML with preserved code blocks.

Extract the first HTML table into quoted CSV, preserving cell text and rejecting merged cells that would distort columns.

Convert sanitized HTML content into Markdown with headings, links, lists, code blocks and supported tables.

Extract readable plain text from HTML, remove scripts and styles, and preserve useful line breaks.

Review pasted response headers for indexing, canonical, compression, cache and security signals.

Parse raw HTTP request or response headers into JSON while preserving repeated values such as Set-Cookie as arrays.

Look up common HTTP response codes, their standard reason labels, response class and a link to the official IANA registry.

Extract internal links from pasted HTML and summarize targets, anchors and relative paths.

Convert JSON parameters into a URL query string or decode query parameters into JSON, including repeated keys and Unicode.

Group URLs that target the same keyword from a supplied CSV for manual cannibalization review.

Generate LocalBusiness JSON-LD from business name, address, phone, hours and coordinates.

Summarize common and combined access log lines by status code, path, user agent and crawler.

Render Markdown to clean HTML and convert HTML tags back to Markdown syntax.

Generate SEO, Open Graph, and Twitter Card meta tags from a form with live preview.

Find common media types by filename, extension or MIME string, with matching extensions and a clear unknown-type fallback.

Inspect pasted HTML for viewport metadata, fixed-width hints and common mobile layout risks.

Compare business name, address and phone values across supplied listings and highlight mismatches.

List links marked nofollow, sponsored or ugc from pasted HTML.

Generate Open Graph and social metadata tags for a page title, description and image URL.

Preview supplied Open Graph title, description, URL and image fields as a social share card.

Extract methods, paths, operation IDs, tags and deprecated flags from OpenAPI or Swagger JSON. Build an API inventory locally.

Turn OpenAPI paths and operations into a readable Markdown endpoint reference for GitHub and project docs.

Convert an OpenAPI 3 document into a Postman Collection 2.1 with requests, parameters and JSON bodies.

Export podcast and RSS subscriptions from an OPML file to a spreadsheet-friendly CSV list.

Estimate page transfer size from a pasted browser resource report or analyze supplied HTML and asset sizes. Cross-origin pages may block browser inspection.

Estimate transfer size and flag large page assets from sizes you provide; this is not a Lighthouse score.

Extract runnable cURL commands from Postman Collection 2.x requests for terminals, scripts and support tickets.

Generate Product JSON-LD with price, availability, brand and optional aggregate review data.

Create static QR codes for URLs or text and download crisp PNG or SVG files, with local generation and no account.

Scan a QR code from an image file in your browser and copy the decoded text or link. Your image stays on your device.

Map redirect hops from pasted HTTP headers or a redirect trace; no arbitrary server-side URL fetching.

Live-highlighting JavaScript regex playground with capture groups, named groups, and match counts.

Resolve relative links against a base HTTP or HTTPS URL and inspect the resulting origin and cross-origin status.

Check a URL path against pasted robots.txt rules using common longest-match behavior.

Create a robots.txt draft with crawler groups, disallowed paths and a sitemap URL, including clear allow-all and block-all modes.

Convert RSS or Atom feed entries into CSV for spreadsheets, content audits and migration workflows.

Compare several editable search snippets side by side; previews do not predict rankings or actual CTR.

Preview an editable search title, URL and description in desktop and mobile-style layouts.

Generate a standards-shaped XML sitemap from a list of absolute page URLs and optional metadata.

Turn any text into a clean, URL-friendly slug with Cyrillic transliteration and stop-word removal.

Check whether your browser can reach a site over HTTPS and report its response timing. This is a browser connection check, not a certificate-chain or expiry inspector.

Create starter JSON-LD for Article, Product, FAQ, HowTo, Recipe, Event or LocalBusiness schemas.

Parse JSON-LD and report JSON syntax, required-shape and common schema field issues locally.

Review title and description character counts and approximate pixel widths for search snippets.

Generate X/Twitter Card meta tags for a summary or large-image preview.

chmod calculator — numeric notation (755) ↔ symbolic (rwxr-xr-x) with setuid, setgid, and sticky bit.

Parse URLs into protocol, host, path, query params, and hash. Build URLs from components.

Remove common tracking parameters such as utm_*, fbclid and gclid from URLs while keeping unrelated query values and fragments by default.

Build campaign tracking URLs with UTM parameters for Google Analytics and marketing attribution.

Create a downloadable vCard 4.0 contact file with name, phone, email, organization and website, using proper text escaping and UTF-8 folding.

Measure browser-observed load and response timing for a URL that permits cross-origin requests. CORS may block many sites; this is not Lighthouse.

Create a wa.me link with an optional prefilled message to start a WhatsApp chat.

Create a scannable WiFi QR code with your network name, password and security type. The details stay in your browser.

Validate sitemap XML syntax, URL count, absolute locations and common sitemap constraints.

Evaluate relative XPath 1.0 expressions on pasted HTML, including attributes, counts, strings and booleans.

Preview and save available thumbnail images from a public YouTube video link or video ID. No sign-in is needed.