Broken Link Building: Turn 404s Into Backlinks

Quick Summary

• What this covers: Broken link building finds dead links on high-authority sites, then offers your content as a replacement. Earn quality backlinks by solving link rot.
• Who it's for: site owners and SEO practitioners
• Key takeaway: Read the first section for the core framework, then use the specific tactics that match your situation.

Broken link building is a white-hat link-building strategy that earns backlinks by finding broken links on authority sites, creating content that replaces the dead resource, then reaching out to suggest your content as the replacement. It works because site owners want to fix broken links — they provide a poor user experience and waste link equity.

Unlike cold outreach or guest posting, broken link building offers immediate value. You're solving a problem (broken link) rather than asking for a favor (link to my content). This makes outreach more successful and builds relationships with site owners in your niche.

This guide walks through the broken link building process from finding broken links to crafting outreach emails that get responses.

Why Broken Link Building Works

Reason 1: You're Solving a Problem

Site owners don't want broken links. When you point out a 404 and suggest a working alternative, you're doing them a favor. This makes them more likely to update the link.

Reason 2: High-Authority Links Are Available

Popular resources that earn links eventually go offline. When they do, every site linking to them has a broken link. These sites are often high-authority domains — exactly the kind you want linking to you.

Reason 3: Less Competitive Than Traditional Link Building

Most SEOs don't pursue broken link opportunities. The effort required (finding broken links, creating replacement content, personalizing outreach) deters lazy competitors. This gives you a clear shot at links they'll never discover.

Broken Link Building Process

Step 1: Find Broken Links in Your Niche

Use Ahrefs, Semrush, or Check My Links (Chrome extension) to find broken outbound links on authority sites.

Method 1: Find Broken Links on Resource Pages

Resource pages list helpful links on a specific topic. They accumulate broken links over time.

How to find resource pages:

Google search operators:

[your topic] + "helpful resources"
[your topic] + "useful links"
[your topic] + "further reading"
[your topic] + inurl:resources
[your topic] + inurl:links

Example for SEO:

seo + "helpful resources"

This returns pages listing SEO resources. Visit each page and scan for broken links using Check My Links (Chrome extension) or manually clicking links.

Method 2: Find Competitor Backlinks to Broken Pages

1. Enter a competitor's domain in Ahrefs Site Explorer
2. Go to Best by Links > Best by Links (historical)
3. Filter for pages with 404 HTTP status code
4. Export the list of broken pages
5. For each broken page, click Backlinks to see which sites linked to it

These sites have broken outbound links. Your content can replace them.

Method 3: Find Broken Links on Authority Sites

1. Identify 10-20 high-authority sites in your niche (DA/DR 50+)
2. Use Ahrefs Site Explorer > Broken Links (outgoing)
3. Filter for 404 pages
4. Export the list

This shows every broken outbound link on the site. Look for broken links to resources similar to your content.

Step 2: Analyze the Broken Link's Context

Not all broken links are worth pursuing. Evaluate:

Does the broken link fit your content? If the broken link pointed to a guide on "keyword research tools" but you only have content on "on-page SEO," it's not a fit.

Is the linking page still active and relevant? If the page linking to the broken resource is itself outdated or low-traffic, the link has minimal value.

How many backlinks does the linking page have? Check the linking page's Ahrefs Domain Rating (DR) or Semrush Authority Score. Prioritize pages with DR 40+.

Is the anchor text relevant? If the broken link's anchor text matches your content topic, it's a strong fit.

Step 3: Create or Identify Replacement Content

You need content that replaces the broken resource. Options:

Option A: You Already Have Suitable Content

Check your site for content that matches the broken link's topic. If it exists, use it.

Option B: Create New Content

If you don't have a replacement, create one. This is the highest-effort approach but also the most effective — your content will be a perfect fit.

Example:

• Broken link pointed to "beginner's guide to SEO"
• You create a comprehensive beginner SEO guide specifically to replace it

Option C: Curate a Better List

If the broken link pointed to a listicle (e.g., "Top 10 SEO Tools"), create your own listicle covering the same topic.

Step 4: Craft Your Outreach Email

Broken link outreach emails should:

• Point out the broken link
• Suggest your content as a replacement
• Make it easy for the recipient to update the link

Outreach Email Template

Subject: Broken link on [Page Title]

Hi [First Name],

I was reading your article "[Article Title]" and noticed a broken link in the [section name] section.

The link to [broken resource title] returns a 404 error:
[broken URL]

I recently published a guide on [topic] that covers the same material:
[your URL]

If you think it's a good fit, feel free to use it as a replacement. Either way, thought you'd want to know about the broken link.

Thanks,
[Your Name]

Key Elements

1. Personalize the subject line — Use the specific page title, not a generic "Broken Link on Your Site"

2. Mention the broken link's context — "In the 'Further Reading' section" or "In the paragraph about keyword research"

3. Provide the broken URL — Make it easy for them to verify and locate the broken link

4. Suggest your content — Don't demand a link; position it as a helpful suggestion

5. Keep it short — 5-7 sentences max. Busy site owners won't read long emails.

Step 5: Send Outreach Emails

Use an outreach tool or send manually.

Manual outreach:

• Find contact emails via the site's Contact page or About page
• Use Hunter.io to find email addresses if none are listed

Outreach tools:

• Pitchbox (automates outreach campaigns)
• BuzzStream (manages outreach and follow-ups)
• Mailshake (email outreach with tracking)

Follow-up strategy:

• Wait 5-7 days
• Send one follow-up if no response
• Don't send more than 2 emails total (you'll come across as spammy)

Step 6: Monitor Responses and Build Relationships

Track:

• Open rate — Are recipients opening your emails?
• Response rate — Are they replying?
• Link acquisition rate — Are they updating the broken link?

Typical success rates:

• Open rate: 40-60%
• Response rate: 10-20%
• Link acquisition rate: 5-15%

If you send 100 outreach emails, expect 5-15 successful backlinks.

Advanced Broken Link Building Tactics

Tactic 1: Target Recently Broken Links

Newly broken links are more likely to be updated. Use Ahrefs Site Explorer > Historical data to find links that broke in the last 30 days.

Tactic 2: Find Broken Links from Expired Domains

1. Use ExpiredDomains.net to find expired domains in your niche
2. Enter the expired domain in Ahrefs Site Explorer > Backlinks
3. Export all sites linking to the expired domain
4. Reach out offering your content as a replacement

Tactic 3: Create 10x Better Content Than the Broken Resource

Use Wayback Machine to view the broken page's content before it died. Create content that's more comprehensive, updated, and better formatted.

Tactic 4: Offer Multiple Replacement Options

If you have several resources that could replace the broken link, mention 2-3 options and let the site owner choose. This increases the likelihood of a link.

Tactic 5: Scale with Tools

Link Prospector and BuzzStream automate finding broken links and managing outreach at scale.

Common Mistakes

Mistake 1: Suggesting Irrelevant Content

If the broken link pointed to "technical SEO tools" and you suggest your "content marketing guide," it won't work. Replacement content must match the broken link's topic.

Mistake 2: Generic Outreach Emails

Subject: Broken Link

Hi,

I found a broken link on your site. You should link to my article instead.

Thanks.

This gets ignored. Personalize every email.

Mistake 3: Not Checking if the Broken Link Was Already Fixed

Before sending outreach, verify the link is still broken. Site owners may have already replaced it.

Mistake 4: Sending Too Many Follow-Ups

One follow-up is acceptable. Three follow-ups is spam.

Mistake 5: Ignoring Low-DR Sites

A DR 30 site in your niche can be more valuable than a DR 60 site in an unrelated niche. Don't ignore mid-tier sites if they're topically relevant.

Broken Link Building vs. Other Link-Building Strategies

Broken link building offers a strong effort-to-reward ratio. It's less competitive than guest posting and more targeted than generic outreach.

Tools for Broken Link Building

Minimum required: Ahrefs or Semrush + email outreach tool (or manual email)

Frequently Asked Questions

How many broken links should I target per month?

Start with 20-50 outreach emails per month. Track results. If your success rate is 10%, that's 2-5 new backlinks per month.

Should I create content before or after finding broken links?

Find broken links first. Create content only for high-value opportunities (DR 50+ linking pages). Don't create content speculatively.

What if the site owner doesn't respond?

Send one follow-up 5-7 days later. If no response, move on. Don't send more than 2 emails.

Can I suggest a competitor's content as a replacement?

Technically, yes — it still solves the broken link problem. But it benefits your competitor, not you. Only do this if building relationships is more valuable than acquiring the link.

How long does it take to see results?

1-4 weeks from outreach to link acquisition. Some site owners respond and update immediately. Others take weeks to act.

Next Steps

Identify 10 high-authority sites in your niche. Use Ahrefs Site Explorer > Broken Links (outgoing) to find broken outbound links. Analyze each broken link for relevance to your content. Create or identify replacement content. Send personalized outreach emails pointing out the broken link and suggesting your content. Track responses and follow up once if needed. For related link-building guidance, see Find and Fix Broken Links Fast, Fix 404 Errors for SEO, and Link Building Quick Wins Guide.

When This Fix Isn't Your Priority

Skip this for now if:

• Your site has fundamental crawling/indexing issues. Fixing a meta description is pointless if Google can't reach the page. Resolve access, robots.txt, and crawl errors before optimizing on-page elements.
• You're mid-migration. During platform or domain migrations, freeze non-critical changes. The migration itself introduces enough variables — layer optimizations after the new environment stabilizes.
• The page gets zero impressions in Search Console. If Google shows no data for the page, the issue is likely discoverability or indexation, not on-page optimization. Investigate why the page isn't indexed first.