Free SEO tool · Google Search Console
Search Console Regex Builder (GSC)
Build a Search Console regex filter without learning RE2: pick what to match, see the pattern, and copy it into the Performance report.
Search Console uses RE2: no lookaheads or backreferences. Use "Doesn’t match regex" in the filter to exclude.
- PASS Pattern^(who|what|when|where|why|how)\b
- PASS FilterQuery · Custom (regex) · Matches
- NOTE EngineRE2 — works in Search Console
What does the free GSC Regex Builder analyze?
-
1
What to match
Contains, any of several words, starts with, ends with or exactly — for queries or pages.
-
2
Several words at once
Join alternatives with | without writing the pattern by hand.
-
3
Brand and non-brand
Build a pattern for your name, then use “Doesn’t match regex” to see everything else.
-
4
Questions
Find queries that start with how, what, why and similar words.
-
5
RE2 only
Search Console uses RE2 — no lookaheads or backreferences, so every pattern here works there.
-
6
Copy and paste
Paste the pattern into a Custom (regex) filter in the Performance report.
How to use the filter
-
1
Open Performance
In Search Console, open the Performance report for your site.
-
2
Add a filter
Query or Page, then Custom (regex).
-
3
Paste the pattern
Choose “Matches regex” or “Doesn’t match regex”.
-
4
Compare periods
See how those queries or pages changed.
-
5
Watch it every week
SEO Monitor tracks your Search Console data for you.
How to interpret your results
- ISSUE
- A clear fault that usually deserves a fix, e.g. a missing title or a non-200 status.
- WARNING
- May be a problem depending on the page, e.g. a missing description or canonical, or a long title.
- PASS
- Checked and looks fine.
- NOT CHECKED
- Not part of this check, or blocked by the site. The report says which — it is never counted as a fault.
GSC Regex Builder vs Website Audit vs SEO Monitor
GSC Regex Builder
One URL · free · no account
Build regular expressions for Search Console filters without writing RE2 by hand.
You’re hereWebsite Audit
Many pages · free quick crawl
Crawls a limited set of pages and groups issues across your site, like duplicate titles and potential orphan pages.
Run a website audit →SEO Monitor
Connected data · account
Uses your Search Console and GA4 to track clicks, queries and changes over time.
Explore SEO Monitor →FAQ
Frequently asked questions
About the GSC Regex Builder.
01
Which regex does Search Console use?
RE2 — no lookaheads or backreferences. The builder only produces patterns RE2 accepts.
02
Is matching case-sensitive?
Yes by default. The builder adds (?i) when you want any case.
03
Where do I paste the pattern?
Performance report → add filter → Query or Page → Custom (regex).
04
Do I need a Search Console account?
To use the filter, yes — it runs on your own Search Console data. Building the pattern is free here.
05
Is there a length limit?
Search Console accepts patterns up to 4,096 characters.
06
Is it free?
Yes. No account is needed. We limit how often one visitor can run checks so the tools stay fast for everyone.
