If you've never actually looked at who's linking to your site, you're not alone — most site owners focus on building links and rarely check what's already there. But knowing how to check backlinks matters just as much as building new ones: it tells you what's working, what might be dragging your profile down, and where the real gaps are compared to competitors.
This guide walks through the free and paid ways to check your backlinks, what a backlink checker actually shows you, and how to run a basic backlink audit that surfaces anything worth acting on.
We'll also cover the differences between free and paid tools, since they don't show identical data, and knowing the gap matters when you're deciding which to rely on.
By the end, you'll have a repeatable process you can run quarterly (or more often, if you're actively building links) rather than a one-time check that goes stale within a few months.
What Does It Mean to Check Backlinks?
Checking your backlinks means reviewing the external websites currently linking to your pages — how many there are, which domains they come from, what anchor text they use, and whether the links are set up to pass ranking credit. A backlink checker is any tool, free or paid, that surfaces this data by crawling the web and maintaining an index of discovered links.
No single tool has a complete, real-time picture of every link on the web. Different backlink checkers crawl at different frequencies and depths, which is why cross-referencing more than one source often gives you a more accurate picture than relying on just one.
It's also worth distinguishing between checking your own backlinks and checking a competitor's. The mechanics are identical — most tools let you plug in any domain, not just your own — but the purpose differs: reviewing your own profile is about health and quality control, while reviewing a competitor's is primarily about finding new link opportunities.
Why Checking Your Backlinks Matters
You can't manage what you can't see
Without visibility into your current backlink profile, you have no way to tell whether your link building efforts are actually working or whether something is quietly holding your rankings back.
Toxic or spammy links need to be identified
Occasionally, sites accumulate links from low-quality or spammy sources — sometimes through no fault of their own, like negative SEO attempts. Regular checks catch these early.
It reveals what's genuinely working
Seeing which of your pages attract the most backlinks, and from where, tells you what kind of content is actually worth investing more in.
It's essential for competitive research
Checking a competitor's backlinks — not just your own — is one of the fastest ways to find realistic new link opportunities for your own site.
It helps you measure whether link building efforts are paying off
If you've invested time or budget in outreach or a paid campaign, periodically checking your backlinks is the only way to confirm those efforts are actually translating into live, working links.
How to Check Your Backlinks
Here's a practical process for reviewing your backlink profile, whether you're doing a quick check or a full audit.
Step 1: Start with a free, first-party tool
Google Search Console shows the backlinks Google itself has discovered for your site, directly from the source — a good, no-cost starting point before turning to third-party tools.
Step 2: Cross-reference with a dedicated backlink checker
Third-party tools maintain their own crawl indexes and often surface links Search Console doesn't show, or vice versa.
Free backlink checker limitations. Most free tiers cap the number of results shown or limit how far back their index goes — useful for a quick spot check, but often insufficient for a full audit.
Paid backlink checker advantages. Paid tools like Ahrefs or Semrush typically offer larger indexes, historical data, and more detailed filtering by link type, anchor text, and domain quality.
Tip: If you're only checking occasionally, a free tool combined with Search Console is often enough — reserve a paid subscription for when you need ongoing, in-depth tracking or competitor research.
Step 3: Review link quality, not just quantity
For each significant new or existing link, check whether the linking domain is relevant, appears to have real traffic, and isn't part of an obvious link farm or spam network.
Step 4: Flag anything that looks toxic
Links from clearly spammy, unrelated, or auto-generated sites are worth noting for potential removal requests or, in serious cases, a disavow file submission.
Step 5: Look for patterns, not just individual links
A single questionable link rarely matters much on its own. What's worth acting on is a genuine pattern — a cluster of similar low-quality links appearing around the same time, which can indicate a negative SEO attempt or a leftover from an old, poorly executed campaign.
Backlink Checking Methods Compared
Google Search Console
Best For: A free, authoritative, first-party view of exactly which links Google has discovered and is aware of for your site.
Watch Out For: It only shows what Google has crawled and chosen to report — it isn't a complete index of every link that technically exists.
Free third-party backlink checkers
Best For: Quick spot checks and getting a general sense of your profile without a subscription cost.
Watch Out For: Capped result counts and shallower historical data compared to paid alternatives.
Paid backlink checker subscriptions
Best For: Ongoing monitoring, in-depth competitor research, and businesses that need comprehensive filtering and historical trend data.
Watch Out For: Cost adds up for smaller sites that only need occasional checks — evaluate whether you need the depth before committing to a subscription.
Manual verification
Best For: Confirming that a specific, important link (like a recent placement) is actually live, correctly formatted, and pointing where intended.
Watch Out For: Not scalable for reviewing an entire backlink profile — use this for spot-checking specific, high-value links, not bulk auditing.
Best Practices for a Backlink Audit
Check your backlinks on a regular schedule
A quarterly review is a reasonable cadence for most sites — frequent enough to catch problems early without becoming a constant distraction.
Segment by link quality, not just total count
Group your links into rough tiers (strong, neutral, questionable) rather than treating your backlink count as a single flat number.
Pay attention to anchor text distribution
A backlink audit is a good time to check whether your anchor text looks naturally varied or suspiciously repetitive.
Compare your profile against competitors
Checking backlinks isn't just about your own site — understanding where competitors are getting linked reveals realistic new opportunities.
Document what you find
Keep a simple record of your audit findings over time so you can track whether your profile is genuinely improving.
Look beyond the raw numbers to referral traffic
Cross-reference your backlink data with referral traffic in your analytics tool — a link that sends real visitors is doing more for your business than one that exists purely as an SEO signal.
Common Mistakes to Avoid
Relying on only one tool
No single backlink checker has a complete index — cross-referencing at least two sources gives a more accurate picture.
Panicking over every low-quality link
A handful of low-quality links is normal for almost any site and rarely warrants a disavow action on its own — reserve that step for genuine, pattern-level toxicity.
Checking once and never again
A backlink profile changes continuously as links get added or removed — a one-time check quickly becomes outdated.
Ignoring nofollow versus dofollow distinctions during review
Not distinguishing between link types during an audit makes it hard to accurately assess how much ranking credit your profile is actually passing.
Confusing referring domains with total backlinks
A hundred links from the same five domains is a very different profile from a hundred links spread across a hundred separate domains — track both numbers, not just the total link count.
Frequently Asked Questions
How do I see my backlinks for free?
Google Search Console is the most reliable free starting point, since it shows exactly what Google itself has discovered, and most third-party backlink checkers offer a limited free tier as well.
How often should I check my backlinks?
A quarterly check is reasonable for most sites, though businesses in competitive niches or running active link building campaigns may want to check monthly.
Is a paid backlink checker worth it?
It depends on your needs — if you're doing ongoing competitor research or managing an active link building campaign, the deeper data usually justifies the cost.
What should I do if I find toxic backlinks?
For a small number of low-quality links, it's often fine to leave them and focus on building better ones. For a genuine pattern of spammy or manipulative links, consider a formal disavow submission through your search engine's tools.
Do all backlink checkers show the same results?
No — each tool maintains its own crawl index, so results vary. This is exactly why checking more than one source gives a more complete picture.
Can I check a competitor's backlinks the same way?
Yes — most backlink checkers work for any domain you enter, not just your own, which makes competitor research one of the most practical uses of these tools.
Key Takeaways
- Checking backlinks regularly is as important as building new ones — it reveals what's working and what needs attention.
- Google Search Console is a solid free starting point; paid tools add depth, history, and competitor research capability.
- No single backlink checker has a complete index, so cross-referencing multiple sources gives a more accurate picture.
- Review link quality and anchor text distribution, not just your total link count.
- A quarterly audit cadence is reasonable for most sites to catch issues early without becoming a constant task.
If quarterly manual checks sound like more discipline than you can sustain, an ongoing check backlinks habit is easier to keep up when it's built into a tool you're already using for other SEO work.
Once you understand your current backlink profile, building on it deliberately is the next step — ZeroSEO's Backlink Exchange can help fill relevant gaps you spot during an audit, and you can sign up to try it directly. For more on Google's own backlink data tools, see Google Search Central.