Moz's flagship browser extension puts DA/PA authority scores on every page and SERP. Here's what's free, what requires Pro, and how it holds up against Ahrefs and SEOquake in 2026.
Free tier availableChrome & FirefoxPro from $99/month
Editor's Verdict
MozBar remains the quickest way to get DA/PA data in your browser without a paid tool. The free tier is genuinely useful for quick authority checks and competitor comparisons. It falls short of Ahrefs Toolbar for technical SEO and behind SEOquake for free SERP overlay depth — but if Moz's link index is your preferred data source, the extension is a must-install.
Overall
4.1 / 5
Free features
3.8 / 5
Data accuracy
4.0 / 5
Ease of use
4.5 / 5
What Is MozBar?
MozBar is Moz's official browser extension, available for Chrome and Firefox. It overlays Domain Authority (DA) and Page Authority (PA) scores on every website you visit and on every result in Google search — giving you an instant read on how authoritative a page or domain is within Moz's link graph.
It was one of the first widely-adopted SEO browser toolbars and remains popular with content marketers, link builders, and SEO beginners who are familiar with Moz's authority metrics.
Free Features — No Account Needed
Installing MozBar and visiting any page gives you immediate access to:
Feature
Free (no account)
Free Moz account
Moz Pro ($99/mo)
Domain Authority (DA)
✓
✓
✓
Page Authority (PA)
✓
✓
✓
Spam Score
✓
✓
✓
Link count overlay
✓
✓
✓
SERP analysis (bulk DA/PA)
✗
✓
✓
On-page grader
✗
Limited
✓
Keyword difficulty
✗
✗
✓
Page optimization score
✗
✗
✓
How to Install MozBar on Chrome
1
Open Chrome Web Store
Search "MozBar" in the Chrome Web Store or click the direct link on Moz's website. Verify the publisher is "Moz" with the blue verified badge.
2
Click "Add to Chrome"
Confirm the permissions prompt. MozBar requests access to all websites to display the toolbar overlay — this is normal for SEO extensions.
3
Pin the extension
Click the puzzle icon in Chrome's toolbar → pin MozBar so the "M" icon is always visible. Click it to toggle the toolbar on or off.
4
Create a free Moz account (optional)
Sign in through the extension to unlock SERP analysis — bulk DA/PA scores across all results on a Google search page simultaneously. Takes 30 seconds to register.
MozBar vs Ahrefs Toolbar vs SEOquake
Feature
MozBar
Ahrefs Toolbar
SEOquake
Authority metric (free)
DA/PA ✓
DR/UR paid only
Semrush AS ✓
SERP overlay (free)
Free account
Paid only
✓ Full
On-page audit (free)
Limited
✓ Full
✓ Full
Redirect tracer
✗
✓
✗
Firefox support
✓
✓
✓
Safari support
✗
✓
✗
No account needed
Partial
✓
✓
Pros
DA/PA visible instantly on every page — no clicks needed
SERP overlay with free Moz account (bulk competitor analysis)
Chrome and Firefox supported
Very easy to use — zero learning curve
Spam score helps spot low-quality link prospects
Trusted brand — Moz is one of the oldest SEO companies
Cons
No on-page technical audit in the free tier
DA/PA can be gamed and don't reflect all ranking signals
Full features require Moz Pro ($99/month) — expensive
No redirect tracing or link checker
No Safari support
Interface feels dated compared to Ahrefs Toolbar
Who Should Use MozBar?
Link builders and outreach specialists benefit most — the instant DA/PA overlay on any page speeds up prospect qualification without opening a separate tool. Content marketers doing competitor analysis will appreciate the bulk SERP overlay (free Moz account).
If you primarily need technical SEO tools (redirect checking, broken links, on-page audits), Ahrefs SEO Toolbar covers those better for free. If you want the most data in a free SERP overlay, SEOquake gives more without any account.
Install MozBar Free
DA/PA on every page and SERP — no account needed to start
Yes. MozBar shows DA, PA, and spam score on every page without any account. A free Moz account (takes 30 seconds to create) unlocks the SERP overlay feature. Full on-page grader and keyword difficulty require Moz Pro at $99/month.
Yes. MozBar is available on both Chrome and Firefox. Install it from the Mozilla Add-ons directory for Firefox. Both versions offer the same core DA/PA features.
Domain Authority is a Moz proprietary metric — it's a useful proxy for site authority but not a Google ranking signal. It correlates reasonably with search performance. For link-focused analysis, many SEOs cross-reference with Ahrefs DR or Semrush AS. Use DA/PA as a directional indicator, not an absolute truth.
MozBar is better for quick authority checks and SERP overlays for free. Ahrefs Toolbar is better for technical SEO (redirect tracing, broken link checking, on-page audits) without paying anything. For backlink metrics, Ahrefs DR/UR (paid) is generally considered more precise than MozBar's DA/PA. Read our full Ahrefs vs MozBar comparison.