The Best Free Backlink Checker Tools in 2026

Backlink data used to require an expensive subscription. That is no longer true. Several free backlink checker tools now provide meaningful data for audits, competitor research, and link-building without a paid plan.

This guide covers the best free options available in 2026, what each one does well, and which situations each is best suited to.

What to look for in a free backlink checker

Not all free tools are equal. Before comparing options, it helps to know what actually matters:

• Data freshness. How recently was the index updated? Stale data can miss new links or show links that have been removed.
• Index size. A larger index captures more of the web's link graph. Tools built on smaller indexes will miss links.
• Referring domains vs total links. Both numbers are useful, but referring domains is the more important metric.
• Quality signals. Does the tool help you distinguish high-quality links from low-quality ones?
• Export. Can you download the data? For anything beyond a quick lookup, being able to work with the data in a spreadsheet is essential.
• Limits. Free tools often cap the number of results shown or the number of searches per day.

Crawly Backlink Checker

Best for: Quick checks, toxic link audits, competitor analysis, CSV export

Crawly's backlink checker tool uses Common Crawl data, one of the largest open web indexes available. It shows referring domains, total links, link quality ratings (High, Medium, Low), PageRank rank with a global percentile, and outbound links.

Key features:

• No account required
• Full CSV export of referring domains and quality ratings
• Potentially toxic domains flagged automatically
• Outbound link data included
• Donut chart quality breakdown at a glance
• Top backlinks by authority surfaced immediately

The data is refreshed monthly as new Common Crawl releases are published. Because it draws on an open dataset rather than a proprietary crawler, the index reflects a broad cross-section of the web rather than a curated subset.

Best used for: auditing your own site, researching competitors, spotting toxic links, and generating CSVs for client reports.

Ahrefs Free Backlink Checker

Best for: Quick profile snapshot with authority score

Ahrefs offers a limited free version of its backlink checker that shows the top 100 backlinks for any domain, along with its Domain Rating (DR) and URL Rating (UR) scores. Ahrefs has one of the largest proprietary link indexes available, so the data quality is high.

The free version is capped at 100 results and does not include a CSV export. For a full profile, you need a paid plan.

Best used for: checking domain authority at a glance and sampling a backlink profile before deciding whether to pay for the full dataset.

Google Search Console

Best for: Verified owners checking their own site's links

Google Search Console is the only backlink tool that shows you exactly which links Google has discovered and is using to rank your site. The data is directly from Google, which makes it uniquely authoritative for understanding your own profile.

The limitations are significant. You can only check sites you own and have verified. The data is sampled and not always complete. There is no quality rating or toxic link detection. Export is available but the interface is basic.

Best used for: checking your own verified site, particularly after a manual action or when reconciling data from other tools.

Semrush Free Plan

Best for: Seeing a broader picture with keyword data alongside links

Semrush offers a free plan with limited backlink data. The free tier allows a small number of backlink lookups per day and shows a capped view of referring domains and anchors.

Semrush's strength is that it combines backlink data with keyword rankings, organic traffic estimates, and competitive analysis in a single interface. For users who want to see backlinks alongside SEO performance, the free plan gives a useful taster.

Best used for: quick competitor overviews when you also want keyword and traffic context.

Moz Link Explorer

Best for: Domain Authority scoring

Moz's Link Explorer shows Domain Authority (DA) and Page Authority (PA) scores, which have become widely used proxies for link authority in the SEO industry. The free plan allows a limited number of checks per month.

Moz's index is smaller than Ahrefs or Semrush, which means it misses more links. DA is also a Moz-proprietary metric, not a direct Google signal. It is useful as a benchmark but should not be taken as a definitive measure of authority.

Best used for: checking DA scores when working with clients who use DA as a reporting metric.

Ubersuggest

Best for: Beginners who want an approachable overview

Ubersuggest by Neil Patel offers a free backlink overview alongside keyword and traffic data. The interface is straightforward and the reports are easy to understand, which makes it a reasonable starting point for SEO beginners.

Data depth and export options are limited on the free plan. For serious audits, the tool quickly hits its limits.

Best used for: introductory overviews for clients or team members who are new to SEO.

Which tool should you use?

For most practical use cases, the answer depends on what you are trying to do:

| Use case | Recommended tool | |---|---| | Quick domain lookup with export | Crawly Backlink Checker | | Full professional audit | Ahrefs or Semrush (paid) | | Checking your own site's verified links | Google Search Console | | Toxic link identification | Crawly's backlink checker | | Competitor research with CSV | check any domain | | DA score lookup | Moz Link Explorer | | Beginner-friendly overview | Ubersuggest |

For most audits that do not require a paid subscription, Crawly's backlink checker covers the most ground. It returns the full list of referring domains with quality ratings, flags toxic links, includes outbound data, and allows a full CSV export with no account or sign-up required.

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Free tools have real limits. For competitive niches, large sites, or detailed link prospecting work, a paid tool's larger index and richer filtering will be worth the investment. But for a significant number of SEO tasks, particularly for smaller sites, agencies running quick audits, and anyone doing preliminary competitor research, free tools are entirely adequate.

Start with Crawly's backlink checker and see what your profile looks like today.