Quick, no-signup tools for SEO professionals, marketers, and founders building their online presence.
Building something of your own? The authority lookups behind these tools are open endpoints. See the developer and agent resources.
Comparing paid software instead? We compared 13 link building tools side by side, with prices checked in September 2026.
Registration date, website age and re-registration flags for up to 20 domains at once.
Check the Ahrefs Domain Rating of up to 10 sites at once, sorted, with a CSV copy.
Calculate the compounding return on investment for your link building campaigns over 12 months.
Test and score your outreach email subject lines for open rates. Get actionable feedback instantly.
Check if AI assistants like ChatGPT and Claude are likely to mention your product.
AEO score and GEO audit: 17 on-page answer engine checks from a page's HTML, robots.txt and llms.txt. No model calls.
Check if an email address is valid, formatted correctly, and safe to send to. Detect disposable providers instantly.
Enter a name and domain to list every likely email address, ordered by how often each format appears on real blog contacts.
Paste an article URL to see who wrote it, read from the byline, author meta tags and structured data, with their author page and any published email.
Paste a cold email and get a 0 to 100 score from twelve checks calibrated on the reply rates of 8,531 real sends. No AI call.
Paste your email copy and instantly find spam trigger words that hurt deliverability. 200+ words checked across 6 categories.
Check if any URL has noindex directives blocking it from search engine indexing. Checks meta tags, headers, and more.
Enter any URL to see every link and whether it's dofollow, nofollow, sponsored, or ugc. Confirm your placements pass equity.
List every external link on a page, grouped by the domain it points to, with dofollow or nofollow for each. Download as CSV.
Enter a URL or paste your text to see every 1 to 4 word phrase with its density, where your focus keywords appear, and how 2 competitors compare.
Paste ChatGPT's answer to see where it ranks your brand and who sits above you. Tracks your history in your browser.
Brand, topical and URL anchor ideas for the page you want linked, with a mix based on anchors editors published on real placements.
Paste spam links or a backlink export and download a disavow.txt in Google's format, merged with the list you already uploaded.
Discover all XML sitemaps on any website. Checks robots.txt, common paths, and CMS-specific locations instantly.
Preview how any URL looks when shared on social media. Check og:title, og:description, og:image, and Twitter Cards.
Generate Open Graph and Twitter Card meta tags for your pages. Copy the code and paste it into your HTML head.
Validate your llms.txt file format and structure against the specification. Check for errors and missing fields.
Draft your llms.txt from your homepage and sitemap, edit it, and download it.
Go beyond checking, start building
MentionAgent automatically finds link building opportunities and handles outreach for you.
Start Getting Mentioned On Autopilot