In today's SEO world, keyword research is essential if you want your website to rank high on Google and reach the right customers. However, not everyone has the budget to invest in expensive software like Ahrefs, SEMrush, or Moz.
The good news is that there are many completely free but extremely effective keyword research tools available – if you know how to use them. In this article, MIMA TRADING AND SERVICE COMPANY LIMITED will introduce the top free keyword tools today, along with practical instructions so you can apply them immediately to your website, blog, or SEO campaign.
Why is Keyword Research a Must in SEO?
Before diving into the tool list, understand why you need to do keyword research:
- Understand user needs: Knowing what they search for helps you produce relevant content
- Increase ranking potential: Accurate keywords help Google understand your content
- Optimize conversions: Hitting the right keyword insights means increasing the chance of purchase/registration
💡 Example: Someone searching for "cheap UX/UI website design service" may be in urgent need – you just need to write about that topic to convert them.
Criteria for Choosing Free Keyword Tools
Not all free tools are effective. Here are the criteria for choosing:
✅ Easy to use, no technical skills required
✅ Provides search volume, competition, or related keywords
✅ Has a feature to suggest long-tail keywords
✅ Supports Vietnamese and other languages if needed for international SEO
Top 10 Best Free Keyword Research Tools 2025
Google Keyword Planner (GKP)
✅ Advantages:
- Official tool from Google
- Shows monthly search volume, regional trends
💡 How to use effectively:
- Sign up for Google Ads (no need to run ads)
- Enter main keyword → get extended suggestions + volume
- Filter by region (HCMC, Vietnam...)
📌 MIMA Tip: Use GKP in combination with a blog to determine monthly content topics.
Google Trends
✅ Advantages:
- View search trends over time, by region
- Compare popularity between multiple keywords
💡 How to use effectively:
- Compare “UX website design” vs “SEO-friendly website design”
- See the increase/decrease chart, and choose “hot” topics
📌 MIMA application: Create a seasonal content calendar such as "Tet landing page design", "Black Friday hosting discounts"
Answer The Public
✅ Advantages:
- Suggests hundreds of questions users search for around a topic
- Displays as a tree diagram
💡 How to use:
- Enter a keyword like “business email”
- Receive a series of questions like: “what is business email?”, “is business email secure?”
📌 MIMA application: Write a Q&A blog that's extremely effective for ranking high.
Ubersuggest (free version)
✅ Advantages:
- Shows volume, SEO difficulty, related keywords
- Has a sample content plan
💡 How to use:
- Go to https://neilpatel.com/ubersuggest/
- Enter keyword → receive detailed information
📌 Note: The free version is limited to the number of uses/day → take advantage of the optimal time.
Keyword Tool.io (free version)
✅ Advantages:
- Creates a long list of keyword suggestions from Google Suggest
- Supports many platforms: Google, YouTube, Amazon…
💡 How to use: Type in a keyword → get a list of long-tail keywords that people actually search for
📌 MIMA application: Write long-tail blog titles such as: “SEO-friendly website content writing service for small businesses”
AlsoAsked.com
✅ Advantages: Shows related questions extracted from Google's “People Also Ask”
💡 How to use: Enter a keyword → suggestion question branch diagram
📌 Very suitable for in-depth content such as "10 things to know about..."
Ahrefs Free Keyword Generator
✅ Advantages:
- Suggests related keywords with volume
- Highly accurate competition (even though the free version is limited)
💡 Application: Although you can only see 100 keywords, the data quality is higher than other tools.
📌 Use when writing pillar content.
Keyword Surfer (Chrome extension)
✅ Advantages:
- Displays keyword volume directly on Google Search
- Suggests related keywords on the right side of the page
💡 How to use: Install the extension → type a keyword on Google → see volume and keyword ideas
📌 MIMA recommends using this when you want to quickly check keywords when writing an article.
Soovle.com
✅ Advantages: Suggests keywords from many sources: Google, YouTube, Amazon, Bing…
💡 Application: Identify keywords with commercial intent (e.g. people who want to buy on Amazon)
Google Search + Autocomplete
✅ Advantages:
- Unlimited source of inspiration
- Suggestions from real users
💡 How to use:
- Type a keyword on Google → don't press enter
- See the automatic suggestions → very close to user insights
How to Combine Tools to Create a Complete Keyword List
✅ Step 1: Find the root keyword
→ Use Google Keyword Planner or Ubersuggest
✅ Step 2: Expand long-tail keywords
→ Use Keyword Tool, AnswerThePublic, or Google Autocomplete
✅ Step 3: Determine trends
→ Use Google Trends
✅ Step 4: Find questions users are interested in
→ Use AlsoAsked + Answer The Public
✅ Step 5: Classify keywords by search purpose
- Informational keywords: “what is business email?”
- Transactional keywords: “buy cheap hosting”, “HCM website design”
- Navigational keywords: “MIMA content SEO”
Mistakes When Using Keyword Research Tools
❌ Only choosing high-volume keywords that don't fit your goals
❌ Not optimizing long-tail keywords
❌ Not checking competitiveness
❌ Keyword stuffing
❌ Not updating with new trends
👉 To SEO effectively, keywords must be used reasonably, naturally, and intelligently integrated in titles, H2s, beginning paragraphs, and CTAs.
MIMA – Reputable SEO Content Deployment Unit in HCMC
MIMA TRADING AND SERVICE COMPANY LIMITED specializes in providing standard SEO content writing services combined with methodical keyword research:
🔹 Analyze keywords based on niche markets
🔹 Build a standard Google SEO article structure
🔹 Write blogs, landing pages, and product descriptions according to the customer journey
🔹 Develop quarterly/monthly content marketing strategy
You don't need to spend tens of millions of dong each month on expensive keyword research software. With 10 free but extremely effective tools like the ones above, you can completely implement an in-depth SEO campaign, increase rankings – and most importantly: increase actual conversions from content, either on your own or with a team like MIMA.
Contact Information
MIMA TRADING AND SERVICE COMPANY LIMITED
📍 Address: Hoc Mon, Ho Chi Minh City
📞 Hotline/Zalo: 0909 035 333
📩 Email: info@mimadigi.com
🌐 Website: https://mimadigi.com
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