Nofollow Link Checker

What Is a Nofollow Link and What Do Sponsored and UGC Mean?

The rel attribute on an HTML anchor tag communicates the relationship between the linking page and the destination URL to search engines. Four rel values are relevant to SEO link equity: no rel value (interpreted as a follow link), nofollow, sponsored, and ugc. Google introduced sponsored and ugc as additional rel values in September 2019 to provide more granular signals beyond the existing nofollow attribute.

A follow link (an anchor tag with no rel attribute, or a rel attribute that does not contain nofollow, sponsored, or ugc) passes full link equity from the linking page to the destination. This is what most link builders and content marketers aim for when placing content on external sites. A nofollow link instructs search engines not to follow the link or pass PageRank, though Google has stated it treats nofollow as a hint rather than a directive, meaning it may choose to count the link in some circumstances.

The sponsored attribute indicates that the link is part of a paid or commercial arrangement, such as advertising, sponsorship, or a paid placement. Adding sponsored to links that represent paid placements is a Google requirement rather than a recommendation. Failing to mark paid links as sponsored is a violation of Google's guidelines and can result in manual actions for both the linking and the linked-to site. The ugc attribute designates links created by users in user-generated content areas such as comments, forum posts, and community contributions.

According to Google's guidance on qualifying outbound links, all three attributes (nofollow, sponsored, ugc) are treated as hints for crawling and ranking purposes. The practical implication is that nofollow links do not reliably pass link equity, but they are not entirely worthless: they can drive referral traffic, build brand visibility, and may be partially counted in some situations according to Google's published statements. The RFC 8288 Web Linking standard governs the formal specification for link relation types.

Verifying link attributes matters in several practical situations. When you arrange a content partnership, media placement, or guest post expecting a follow link, confirming that the live link does not have nofollow applied protects the value of the placement. When auditing your own site's outbound links, confirming that commercial or paid links have been correctly marked as sponsored protects the site from Google's paid link penalties. When reviewing user-generated content areas, confirming that ugc or nofollow is applied prevents the site from inadvertently passing equity to spammy user-submitted links.

How to Use the Nofollow Link Checker

1. Navigate to the page you want to check in your browser.
2. Right-click anywhere on the page and select View Page Source (or press Ctrl+U on Windows / Cmd+U on Mac). This opens the raw HTML source of the page.
3. Select all the source code (Ctrl+A / Cmd+A) and copy it (Ctrl+C / Cmd+C).
4. Paste the HTML into the input area above using Ctrl+V / Cmd+V.
5. The tool immediately extracts all anchor tags and displays summary counts by type and a full classified table.
6. Use the filter buttons to view only a specific link type. This is useful when you want to review just the nofollow or sponsored links in isolation.
7. Export the classified results as CSV for inclusion in a link audit spreadsheet or to share with a client or team member.
8. For specific link verification (such as checking a single partner link), you can paste just the relevant HTML snippet rather than the full page source.

Link Attribute Types Compared

When to Use the Nofollow Link Checker

The SEO Verifying a Guest Post Placement

An SEO specialist has arranged a guest post on an industry publication. The agreement was for a contextual follow link within the article body. The post goes live and she copies the page source into the nofollow link checker. The tool shows that her link has rel="nofollow" applied despite the agreement. She also spots that the publication has applied nofollow to all external links site-wide, including editorial citations: a policy not disclosed before the content agreement was made. She uses the checker's export to document the placement details and contacts the editor to discuss the linking policy, ultimately deciding to withdraw from further content partnerships with that publication.

The Web Developer Auditing Outbound Links Before a Site Launch

A web developer is finalising a new website for a client before launch. The site includes affiliate links to several product partners. She pastes the homepage and each product page source into the nofollow link checker to confirm that all affiliate and partner links have the sponsored attribute applied. The checker reveals that three affiliate links in the product comparison section have no rel attribute and are therefore passing as follow links. She adds rel="sponsored" to all affiliate links in the template and re-runs the checker to confirm the fix before the site goes live.

The Content Manager Reviewing Internal Link Policy Compliance

A content manager at a media site wants to verify that the site's CMS is not automatically applying nofollow to internal links. She pastes the source of five representative article pages into the checker and filters the results to show only internal links. All internal links are classified as Follow, confirming that the CMS link handling is correct. She also notices that several user comment links are classified as Follow rather than UGC, which is incorrect for a site accepting anonymous comments. She raises a development ticket to add rel="ugc" to the comment link template.

The Link Auditor Checking a Purchased Backlink Portfolio

An SEO consultant is auditing a backlink portfolio inherited from a previous agency. He has a list of 60 URLs where links were reportedly placed. He opens each page source in turn, pastes it into the checker, and filters for the specific link pointing to the client domain. Of 60 pages checked, 14 have the client link classified as nofollow or sponsored despite being sold as follow placements. He documents each case with the checker output and builds a report showing the client that they paid for 60 follow links but received only 46, with a clear monetary impact analysis per link. The report supports the client's decision to dispute charges with the previous agency.

Advanced Use Cases for Link Attribute Verification

Monitoring outbound link compliance across a large content site requires a systematic approach beyond page-by-page manual checking. For WordPress sites, plugins such as WP External Links allow bulk configuration of rel attributes across all external links. After any plugin update or theme change, run a sample of representative pages through the nofollow link checker to confirm that the plugin is still applying attributes correctly and that the update has not reset the configuration. CMS updates are the most common cause of unexpected rel attribute changes appearing across a site without any deliberate editorial action.

Checking competitor sites for their outbound link policy gives you intelligence on how authoritative sites in your niche treat external links. If a high-authority publication in your niche passes follow equity to external links in editorial contexts, it is a more valuable target for content partnerships and guest placements than a site that applies nofollow universally. Paste the source of key pages on competitor or target sites into the checker to understand the site's linking policy before investing in a content placement relationship. A site that applies sponsored to all external links regardless of the context is a different opportunity to one that reserves sponsored only for disclosed commercial content and passes follow equity to genuine editorial citations.

Verifying internal link attributes within your own site is a separate but related use case. Copy the source of key pages such as your homepage, category pages, and high-traffic blog articles into the checker and filter to internal links only. All internal editorial links should be classified as Follow. If any internal links appear with nofollow applied, investigate which template or plugin is adding the attribute. Internal nofollow links deprive your own pages of equity flow from authoritative internal sources, which is a self-inflicted ranking disadvantage.

Common Nofollow Mistakes to Avoid

Applying nofollow to all outbound links as a blanket policy is an overcorrection that misses the purpose of the attribute. Nofollow was designed for links you cannot vouch for or that represent commercial relationships. Editorial links to reputable sources that you are genuinely citing as references should be follow links. Blanket nofollow policies deprive the linked sites of deserved equity and may signal to Google that a site is not participating genuinely in the web as a publishing entity. Use nofollow specifically for paid, unvetted, and user-generated links rather than all external links.

Forgetting to add sponsored to affiliate and paid links is a compliance risk that many site owners underestimate. Google's guidelines explicitly require that paid or affiliate links be marked with sponsored or nofollow. A manual review team discovering a site with numerous unmarked affiliate links may issue a manual action for unnatural outbound links, which affects the site's own ranking in addition to removing any equity passed to affiliate partners. Audit your affiliate link implementation regularly, especially after theme or plugin updates that may reset link attributes.

Assuming that nofollow links have zero value causes sites to decline or deprioritise placement opportunities that have genuine benefits. A nofollow link from a high-traffic domain drives real referral visitors. It builds brand visibility and citation presence. It may be partially counted by Google in some contexts. And it contributes to a more natural-looking link profile that includes a mix of follow and non-follow links. Evaluate all link opportunities on their full range of benefits rather than treating nofollow as synonymous with worthless.

Not verifying live links after placement is the most common and most costly mistake in link building operations. The gap between what was agreed and what was implemented is often significant, particularly when working with content marketplaces, link agencies, or publishers using automated CMS systems that apply link attributes in ways their editorial staff may not be aware of. Build verification into your post-placement workflow for every link placed, checking within 48 hours of the link going live.