No signup required — 59 tools to test, validate, and preview your technical SEO.
Test and validate your robots.txt. Check if a URL is blocked and how, or check several page resources at once.
Paste your page URLs and get a clean, ready-to-upload XML sitemap with priority and change-frequency set.
Build valid JSON-LD structured data for Articles, Products, Local Businesses, and FAQs — paste it straight into your page.
Preview Google or Bing local search results from any city or zip code, on desktop or mobile.
Check whether known AI crawlers can access your pages — robots.txt rules, status code, and content for each URL.
Preview how your title tag and meta description will look in Google search results before you publish.
Test your .htaccess rewrite and redirect rules against a request path to see the resulting status and destination.
Paste an RSS or Atom feed and quickly extract every item's URL and published date.
Render a page as any bot — source code, rendered HTML snapshot, visual preview, and blocked resources.
Compare the HTML served to regular browsers against what's served to a bot user-agent — catch dynamic-rendering gaps.
Validate one or more AMP HTML documents against the official AMP project validator, run right in your browser.
Check hreflang annotations in HTML or an XML sitemap for self-references, valid codes, and missing return links.
Compare your mobile and desktop HTML for discrepancies in SEO signals, content, and structured data.
Bulk-check up to 50 pages for mobile usability issues — viewport setup, tap targets, font size, and incompatible plugins.
Check whether the content served at one URL changes by language or country — Google may not crawl and rank every variant.
Bulk-generate Google review links from a business name, address, and Place ID.
Query Google's Knowledge Graph Search API to find entities, their MID, and relevance scores.
Browse confirmed and unconfirmed Google algorithm updates — filter by year and type, updated as new ones roll out.
Preview how your title tag and meta description render as a Google snippet, and check them against length limits.
Turn a page title into a clean, lowercase, hyphenated URL slug — e.g. "/keyword-density-checker".
Pretty-prints XML — paste minified or messy XML and get clean, indented markup.
Beautify HTML — paste minified or messy markup and get clean, properly indented code.
Beautify CSS — paste minified or messy stylesheets and get clean, properly indented code.
Formats JS code — paste minified or messy scripts and get clean, indented output for a quick read.
Highlights differences between two texts — line by line, so you can spot exactly what changed.
Checks if JSON is valid — pinpoints the line and reason a document fails to parse, and pretty-prints valid JSON.
Beautify JSON — paste minified JSON and get clean, properly indented output.
Convert between a human-readable date and a Unix timestamp, in either direction.
Convert a color between HEX, RGB, and HSL — with a live swatch preview.
Generate random UUIDs (v4) individually or in bulk — for test data, tracking IDs, or API keys.
Generate a strong random password — custom length, symbols optional.
Generate placeholder text by words, sentences, or paragraphs.
Removes comments and whitespace from JS to shrink file size for a quick read or paste.
Minify CSS — strips comments and whitespace to shrink stylesheet size.
Removes comments, extra spaces, and blank lines from HTML to shrink markup size.
Finds inconsistent capitalization of the same term across your content — e.g. "SEO" vs "Seo" vs "seo".
Estimates reading time from word count — e.g. "7 minute read", based on an adjustable reading speed.
Counts how often each word appears in your content, ranked by frequency.
Add your Q&A pairs and get ready-to-paste FAQPage JSON-LD structured data.
Build a breadcrumb trail from your URL path and get ready-to-paste BreadcrumbList JSON-LD.
Generate JSON-LD for Organization, Website, FAQ, Article, Breadcrumb, Product, Local Business, or Person.
Creates title, description, keywords, robots, author, charset, and viewport meta tags — ready to paste into <head>.
Produces a <link rel="canonical"> tag for a URL — with normalization (protocol, trailing slash, params).
Creates Twitter/X card meta tags for rich link previews.
Creates og:title, og:description, og:image, and og:url meta tags for rich link previews on Facebook, LinkedIn, and more.
Hashes text using the browser's native crypto API — no data leaves your browser.
Generates the MD5 hash of any text, entirely in your browser.
Encode text to Base64 or decode Base64 back to text, entirely in your browser.
Encode text for safe use in a URL ("Hello World" → "Hello%20World") or decode it back.
Converts <, >, &, and " into HTML entities, or decodes entities back to characters.
Sorts a list of lines A–Z or Z–A.
Removes repeated lines from a list, keeping the first occurrence of each.
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, or Capitalize Every Word.
Turns a page title into a clean, lowercase, hyphenated slug — e.g. "Best SEO Tool For Beginners" → "best-seo-tool-for-beginners".
Shows character and approximate pixel count, and flags too short, perfect, or too long.
Checks title length against the recommended 50–60 characters — e.g. "SEO Tool Free Online" is 21 characters.
Calculates words, characters, characters without spaces, sentences, paragraphs, reading time, and speaking time.
Paste an article and a target keyword to get total words, keyword count, density %, and top repeated words — no API.
Enter a URL and anchor text to generate a ready-to-paste <a href> tag.