KeywordTool.io
Keyword ResearchLong-tail keyword discovery from Google autocomplete data
Overview
KeywordTool.io mines autocomplete suggestions from Google, YouTube, Amazon, and other major platforms to uncover long-tail keyword opportunities that traditional tools often miss. Founded in 2014, the Hong Kong-based company built its reputation on a simple but effective approach: extract the keywords people actually type into search boxes, then layer on volume and competition data. While newer AI-powered keyword tools have emerged, KeywordTool.io remains relevant for its breadth of platform coverage and question-based keyword generation.
The tool's core strength lies in autocomplete mining rather than sophisticated SERP analysis. It generates keyword lists by systematically querying platform autocomplete APIs with your seed keywords plus various modifiers (letters, numbers, prepositions). This approach consistently surfaces keyword variations that don't appear in tools like SEMrush or Ahrefs, particularly longer, more conversational queries that reflect how people actually search.
KeywordTool.io covers 12+ platforms including Google, YouTube, Amazon, eBay, Instagram, Twitter, and Pinterest. This multi-platform approach makes it valuable for e-commerce teams researching Amazon keywords or content creators optimizing for YouTube. The question keyword feature automatically generates who/what/when/where/why/how variations, which proves useful for targeting featured snippets and FAQ content.
Key features
Autocomplete Mining
Extracts thousands of keyword suggestions from Google, YouTube, Amazon, Bing, and other platforms' autocomplete features. Particularly strong for finding question-based and long-tail variations.
Multi-Platform Research
Pulls keyword data from 12+ platforms including Google, YouTube, Amazon, eBay, Instagram, and Twitter. Useful for cross-platform content strategy and understanding search behavior across channels.
Question Keywords
Automatically generates who, what, when, where, why, and how question variations for any seed keyword. Strong for content teams targeting featured snippets and FAQ content.
Search Volume Integration
Provides search volume, CPC, and competition data when available through Google Keyword Planner integration. Data quality varies by geographic location and keyword popularity.
Negative Keywords
Generates negative keyword suggestions for PPC campaigns by analyzing related searches and filtering irrelevant terms. Helps reduce wasted ad spend in paid search campaigns.
API Access
RESTful API for bulk keyword research and integration with other SEO tools. Includes rate limiting and supports JSON/XML output formats.
Pricing
| Plan | Price | Includes |
|---|---|---|
| Free | $0 | 750+ keyword suggestions per search, basic autocomplete data, 2 searches per day |
| Pro Basic | $89/mo | Unlimited searches, search volume data, CPC data, competition metrics, trend data |
| Pro Plus | $99/mo | Everything in Pro Basic, competitor analysis, 2x more keywords per search |
| Pro Business | $199/mo | Everything in Pro Plus, API access, white-label reports, team collaboration |
FAQ
How accurate is KeywordTool.io search volume data?
Search volume data comes from Google Keyword Planner, so accuracy depends on Google's data quality and your account's advertising spend history. Lower-volume keywords often show ranges rather than exact numbers.
Does KeywordTool.io work for local keyword research?
Yes, you can set specific countries and languages for geographic targeting. The tool supports 192 countries and 83 languages, making it useful for local and international SEO campaigns.
Can I export keyword data from KeywordTool.io?
Paid plans allow CSV and Excel exports of keyword lists including metrics like search volume and competition. The free version limits exports and doesn't include volume data.
How does KeywordTool.io compare to Google Keyword Planner?
KeywordTool.io finds more long-tail variations through autocomplete mining, while Keyword Planner provides more accurate volume data. Most SEOs use both tools for comprehensive keyword research.
Does KeywordTool.io provide keyword difficulty scores?
Yes, paid plans include competition metrics and difficulty scores. However, these scores are less sophisticated than dedicated tools like Ahrefs or SEMrush that analyze SERP features and backlink data.
Review Sentiment
55 reviews across 2 sources
Bottom line
KeywordTool.io's free tier lets you evaluate multi-platform keyword research across Google before committing to paid plans from $89/mo. Its 4.4/5 from 55 users is well-earned — the main caveat is free version only shows keyword phrases.
People love
- +Multi-platform keyword research across Google, YouTube, Amazon, Bing, and Instagram
- +Surfaces long-tail keywords from autocomplete that other tools often miss
- +Unique trending keywords filter with percentage-based trend data beyond 12 months
Common complaints
- –Free version only shows keyword phrases — no search volume, CPC, or competition data
- –Expensive annual pricing with no free trial and difficult subscription cancellation
- –Weak competitor analysis and no SERP intent analysis compared to comprehensive SEO platforms
Last updated Feb 2026