SemrushAI SEO
Freemium
An all-in-one SEO suite for keyword research, rank tracking, site audits and competitor analysis, now with AI search visibility tracking.
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PrepostSEO
Freemium150+ free online SEO tools for webmasters, students, writers, and SEO experts.
PrepostSEO at a glance
- Starting price
- $4.17/mo (Basic)
- Free plan
- Yes
- Platforms
- Web, Chrome extension, Mobile
- Best for
- Bloggers; Students
What is PrepostSEO?
PrepostSEO is a suite of more than 150 free browser-based utilities aimed at webmasters, students and SEO practitioners: plagiarism checking, paraphrasing, grammar checking, domain authority lookup, keyword density analysis, backlink checking, image compression and dozens of smaller conversions and calculators. Most work without an account, which makes it a practical bookmark for one-off tasks rather than a platform you commit to.
Judge it by that role. Free tool suites are funded by advertising and usage caps rather than subscriptions, so expect ads, daily limits on the heavier tools and accuracy well below dedicated paid alternatives, particularly on plagiarism and AI detection where false results in both directions are common. Useful for quick checks and for people who cannot justify a paid stack; not a substitute for one where the answer actually matters.
Key Features
Plagiarism CheckerParaphrasing ToolDomain Authority CheckerAI Essay WriterKeyword Density CheckerGrammar CheckerBacklink MakerImage to Text
How to Use PrepostSEO
1Visit the tool you need
2Enter your content or URL
3Click Check or Generate
4Review results and apply suggestions
Who is PrepostSEO for?
✅ Best For
- Bloggers
- Students
- SEO Professionals
- Freelance Writers
❌ Not For
- Enterprise-scale SEO campaigns
- Deep backlink analysis
- Advanced rank tracking
Reviews
No reviews yet. Be the first to review PrepostSEO!
Pricing
Is PrepostSEO free? Yes, there is a free plan. Paid plans start at $4.17/mo (Basic).
Free$0
- ✓Access to 150+ tools with ads and captchas
Basic$4.17/mo
- ✓5K word limit
- ✓50K search queries
- ✓no ads
Standard$12.50/mo
- ✓15K word limit
- ✓200K queries
Company$29.17/mo
- ✓25K word limit
- ✓500K queries
Prompts to Try
Check plagiarism in my article
Rewrite this paragraph in fluency mode
Find the domain authority of example.com
Generate meta descriptions for my blog
Use Cases
Plagiarism Detection
Content Paraphrasing
SEO Auditing
Keyword Research
AI Content Writing
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