Best Free AI Tools for SEO (2025 Edition)

1. SEO.ai — 46 Free AI SEO Tools

What it offers:
SEO.ai provides a suite of free tools covering many parts of SEO work: keyword suggestion, content generation, rank tracking, content rewriting, and more. You don’t necessarily need a paid subscription to start using many of its features.
Why it’s useful:

• Great for content ideation and expansion

• Helps with rewriting and optimizing text

• Useful for small sites or testing ideas
  Source: SEO.AI

2. Ahrefs Free Tools

What it offers:
Ahrefs provides a collection of free tools including a keyword generator, broken link checker, and domain authority checker. While the full Ahrefs suite is paid, these free tools let you do light SEO work without cost.
Why it’s useful:

• Quick keyword ideas

• Finding broken links or opportunities on your site

• Useful for competitor site checks
  Source: Ahrefs

3. WordLift’s Free AI SEO Tools

What it offers:
WordLift gives you tools like AI audit, llms.txt generator, entity extraction, structured data analysis, and free product-description generation.
Why it’s useful:

• Helps with structured data & schema readiness

• Useful for e-commerce sites or product-heavy content

• Lets you test how AI-aware your content setup is
  Source: AI-Powered SEO • WordLift

4. Frase Free Tools

What it offers:
Frase offers free writing and SEO tools, such as meta description generators, content summarization, and content idea features.
Why it’s useful:

• Helps you create optimized SEO content faster

• Good for boosting or refining your existing pages
  Source: Frase

5. Perplexity (Free Tier)

What it offers:
Perplexity is an AI-powered answer engine (like ChatGPT) that can be used for free to research content, get summaries, and explore related topics.
Why it’s useful:

• Great for research and fact-checking

• Helps you see how AI might answer queries in your niche
  Source: Analytify

6. Copy.ai (Free Tier)

What it offers:
Copy.ai gives you free tools for generating meta descriptions, content prompts, writing outlines, and expanding sentences.
Why it’s useful:

• Helps accelerate content creation

• Good for idea generation, SEO text expansion
  Source: Copy.ai

7. SEO Review Tools

What it offers:
SEO Review Tools provides over 70 real-time free SEO tools including a keyword tool, backlink checker, domain authority tool, and an AI content writer.
Why it’s useful:

• Broad coverage of SEO tasks in one place

• Good for audits, diagnostics, and content testing
  Source: SEO Review Tools

How to Choose & Use These Tools Wisely

• Start with a goal: Are you writing content, auditing your site, or researching your niche? Choose tools aligned to those goals.

• Don’t rely on one tool: Each tool may have strengths and weaknesses. Combine perspectives.

• Validate AI output: Always fact-check and adjust tone, as AI can make errors.

• Move up as you grow: As your site scales, consider paid versions or more powerful tools, but use free offerings to test and experiment first.