Google Ads Hidden Search Terms Estimator
Free, no signup. Google Ads folds a share of search terms into an unreadable "(other search terms)" bucket. Upload your search-terms report alongside a GSC queries export or an SEO-tool keyword export, and this tool estimates which on-theme queries are plausibly hiding in there — plus flags visible terms so off-theme they're likely wasted spend.
or paste CSV text
or paste CSV text
Example data — replace with your own, then press Decode search terms
Runs entirely in your browser — nothing you paste is uploaded or stored. Anonymous run-level outcome counters may be used for aggregate research; URLs, domains, IPs, and identifiers are never included, and no statistic is released below 100 runs.
Worked example
Say your Ads search-terms export looks like this:
Search term,Impr.,Clicks,Keyword
buy blue widgets online,2400,180,buy widgets
blue widget price,1100,62,buy widgets
(other search terms),5200,210,
free minecraft skins,320,28,buy widgetsand your GSC queries export includes these rows:
Query,Clicks,Impressions,CTR,Position
cheap blue widgets,44,900,4.9%,4.1
blue widgets bulk order,19,410,4.6%,7.8
buy blue widgets online,6,140,4.3%,3.2buy blue widgets online is already a visible Ads search term, so it's excluded. cheap blue widgets shares heavy word-overlap with the account's visible terms ("blue widgets") but never appears itself — a strong candidate for what's inside the "(other search terms)" bucket. On the flip side, free minecraft skins is a visible search term that shares no wording with anything else in the account — a clear negative-keyword candidate.
Sample report
Pressing Try an example loads this account plus a pasted campaign keyword list ("blue widgets", "widget deals") and renders:
Example data — captured by running this page's own analyzer against the "Try an example" dataset
| Candidate term | Source | Overlap | Confidence |
|---|---|---|---|
| blue widgets | keyword list | 100% | High |
| widget deals | keyword list | 100% | High |
| cheap blue widgets | GSC query | 50% | Medium |
| blue widgets bulk order | GSC query | 33.3% | Low |
- Keyword-list candidates rank highest confidence — "blue widgets" and "widget deals" are 100% overlap because they came straight from the account's own keyword list, not just a loosely related GSC query. See how confidence tiers work ↓.
- Only one visible term became a negative-keyword suggestion — "free minecraft skins" shares no wording with anything else in the account, which is exactly the signal that flags it, not just low volume.
- Overlap percentage isn't the same as estimated traffic share — it measures word similarity to the account's themes, not how much of the 5,200/210 aggregate any one candidate actually accounts for.
How to use it
- In Google Ads, go to Insights and reports → Search terms (or Campaigns → Search terms) and export the report as CSV.
- Export a GSC queries report from Search Console, and/or an organic-keywords export from Ahrefs or Semrush — either works, both is better.
- Optionally paste your campaign keyword list — the exact match-type keywords you're bidding on — one per line.
- Upload or paste everything, then press Decode search terms. No files handy? Click Try an example.
- Review the candidate hidden search terms table for on-theme queries worth adding as keywords, and the suggested negative keywords table for off-theme visible terms worth excluding. Export either as CSV — the negatives file imports directly into Google Ads.
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Local data
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Account summary
Candidate hidden search terms
On-theme queries/keywords that never appear as a visible search term — sorted by word-overlap with your account's own themes. Each row shows its match rationale.
Suggested negative keywords
Visible search terms sharing almost no wording with your keyword list, GSC queries, or SEO-tool keywords — likely off-theme traffic. Review before adding; this is a candidate list, not a verdict.
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How it works
- The "(other)" row is detected and totalled. The tool recognizes the aggregate row under its common labels ("(other search terms)", "Other") and reports its combined impressions/clicks separately from the visible rows.
- A theme vocabulary is built from your own account. Every visible search term and every pasted campaign keyword is broken into 1–3 word n-grams — the account's own "vocabulary" of what it's actually about.
- Candidates are on-theme queries that are never visible. Every GSC query, SEO-tool keyword, and pasted keyword is checked for word-overlap against that vocabulary (matched with near-duplicate text matching so light rephrasing doesn't create false negatives) and excluded if it already appears as a visible search term. What's left, above an overlap floor, is ranked by overlap strength.
- Negative-keyword candidates run the check in reverse. Visible search terms are scored for overlap against a vocabulary built from your GSC queries, SEO-tool keywords, and keyword list — a visible term with almost no overlap there is flagged as likely off-theme.
Every candidate here is a modeled inference from word-overlap, not a Google Ads disclosure. Google Ads never reveals what's actually inside the "(other)" bucket — this tool infers plausible contents from your own account's language and public SEO data.
Limitations
Matching is based on word-overlap (n-grams), which is a blunt instrument — it can miss a genuinely related term phrased very differently, and it can occasionally flag a coincidentally-worded but unrelated term. It can only surface candidates that exist in the files you provide, so a hidden term with no GSC or SEO-tool presence and nothing like it in your keyword list will never appear. The negative-keyword suggestions are directional signals, not verdicts — always sanity-check a term against your actual products/services before excluding it; a niche but valid long-tail query can look "off-theme" purely because your keyword list doesn't cover it yet.
Frequently asked questions
What is the "(other search terms)" row in a Google Ads report?
Google Ads aggregates search terms it won’t disclose individually — usually because they’re low-volume or privacy-sensitive — into a single "(other search terms)" (or just "Other") rollup row with a combined impression/click count but no visible text. Some accounts also simply have terms missing from the report entirely, so the true hidden share can exceed even that aggregate row.
How does this tool guess what those hidden terms are?
It builds a "theme" vocabulary from your account’s own visible search terms plus any campaign keyword list you paste in, then checks every GSC query, SEO-tool keyword, and pasted keyword for word-overlap (n-gram containment) against that vocabulary. Anything that overlaps well but never actually shows up as a visible Ads search term becomes a candidate for what the hidden bucket contains — an inference from your own account’s language, not a disclosure of real Google Ads data.
What is the negative-keyword side output?
The reverse check: visible search terms that share almost no wording with your keyword list, GSC queries, or SEO-tool keywords at all. A visible term this off-theme is often waste — traffic your ads matched to but that has little to do with what you’re actually selling. These are flagged as negative-keyword candidates with a suggested match type, exportable as an Ads-importable CSV. Always review before adding negatives; the tool flags candidates, it doesn’t know your business.
What do the confidence tiers mean?
High confidence candidates share most of their wording with your account’s visible terms and keyword list. Medium confidence is a partial overlap, or a lower overlap paired with real keyword-tool search volume. Low confidence is a weaker match that still cleared the overlap floor — worth a look, not a certainty. Every row also shows the percentage word-overlap and where the candidate came from (a GSC query, an SEO-tool keyword, or your pasted list).
Which CSV formats does it accept?
A Google Ads "Search terms" report export (Search term, Impr., Clicks columns, with the aggregate row auto-detected under its usual labels), a GSC queries export from Search ConsoleA free Google service that reports how a site performs in Google Search and surfaces problems with how Google crawls, indexes, and serves it. It's first-party data straight from Google — but you don't need it to appear in results., and/or an Ahrefs or Semrush organic-keywords export — plus an optional plain-text paste of your campaign keyword list, one keyword per line. Each file’s format is auto-detected from its header row.
Is any of my data uploaded anywhere?
No. Parsing and matching run entirely in your browser — none of your Ads, GSC, or SEO-tool data is sent to our server or stored anywhere. Close the tab and it’s gone.
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Common issues & how to fix them
- Information Hidden search term is a likely negative keyword Fix: Add the irrelevant query or its safe root as a negative keyword at the narrowest appropriate scope.
- Warnings Search term has low landing-page relevance Fix: Route the term to a more relevant landing page or tighten keyword and ad targeting to exclude it.
- Warnings Search term spent without converting Fix: Pause or negate the term unless conversion tracking and intent review justify continued spend.
- Warnings Query exposes match-type leakage Fix: Tighten match types and add negatives for the leaked query pattern without blocking proven converting variants.