Free SEO Grader (Instant, No Signup)

Most content fails for simple on-page reasons: weak headings, thin intros, missing target keyword in H2s, or hard-to-read paragraphs. If you’ve ever wondered “Can I just paste my text and get a free, instant grade with clear fixes?” — you’re in the right place.

Looking for keyword density + suggestions too? Try our free Keyword Research & Density tool and then re-grade your draft here.

Instant SEO Grader

Paste your text → get a letter grade, readability score, keyword density, and the top 3–5 fixes. No signup required.

Tip: Add your primary keyword below your H1 and in at least one H2. Then re-grade to see the improvements.

Jump to: Checklist • Quick Compare • Reviews • How-to • FAQ

Why Use an SEO Grader in 2025?

In 2025, winning content pairs clarity with coverage. That means writing that’s easy to read and complete for the topic. The fastest way to catch gaps is to grade drafts as you write:

  • Real-time guidance: fix problems before publishing.
  • Clarity that ranks: readability nudges reduce pogo-sticking.
  • Topical completeness: semantic terms help meet intent.
  • Structure that scans: headings, lists, and short paragraphs drive dwell time.

What Makes a Great SEO Grader (Checklist)

Bring this checklist into your workflow. If your grader lacks any of these, you’ll miss easy wins.

  • Instant grade (no friction): paste text → get a letter score.
  • Actionable fixes: specific edits, not vague tips.
  • Keyword placement & coverage: title, H1, H2s, intro, conclusion.
  • Semantic suggestions: related terms Google expects on the topic.
  • Readability: grade level, long-sentence flags, transition usage.
  • Structure signals: headings density, list usage, internal links.
  • Exportable report: PDF/CSV for sharing and revision history.
  • Truly free tier: core features available without a paywall.
  • No signup: free core grading works without creating an account.

Quick Comparison Table (Free Tiers at a Glance)

We tested each tool’s free tier for content grading, not full-suite SEO.

Tool Instant Grade Readability Keyword Coverage Semantic Suggestions Export Notes
WordCount AI ✅ Letter grade ✅ ✅ ✅ ✅ PDF/CSV No signup; content-focused
SEMrush SWA ⚠️ Limited free ✅ ✅ ✅ ⚠️ Strong suite; upgrade prompts
Yoast (WP) N/A web ✅ ✅ ⚠️ ⚠️ Excellent in-WP basics
Grammarly ❌ ✅ ❌ ❌ ⚠️ Writing clarity, not SEO
Hemingway ❌ ✅ ❌ ❌ ⚠️ Readability only
PageSpeed ❌ ❌ ❌ ❌ ⚠️ Technical perf, not content
Ahrefs Free Writer ❌ ⚠️ ❌ ⚠️ ⚠️ Brainstorming > grading

(⚠️ = partial/limited on free tier; ❌ = not included on free tier)

Detailed Reviews

1) WordCount AI SEO Content Grader

What it does: WordCount AI offers a suite of free writing tools, with the SEO Content Grader at the center. It grades on-page SEO and clarity in real time and outputs prioritized, actionable fixes.

Key Features

  • Overall SEO letter grade (A+–F) — quick signal for quality.
  • 3–5 prioritized recommendations — “what, why, how to fix,” plus example.
  • Semantic keyword suggestions — related terms to complete topical coverage.
  • Integrated readability — grade level, long sentence flags, and clarity nudges.
  • Export report — PDF/CSV for notes, sharing, or client updates.
  • No signup — frictionless testing and iteration.

Pros

  • Extremely fast feedback loop for edits.
  • Clear, non-technical language for writers and marketers.
  • Free tier includes the essentials (grade, density, readability, fixes).

Cons

  • Focused on content; does not replace a full SEO suite’s technical/links view.
  • Advanced project tracking across multiple pages is out of scope by design.

Best for: Solo writers, editors, small teams who need fast on-page wins.

Our rating: 9.5/10 (free content grading)

2) SEMrush SEO Writing Assistant

What it does: Part of SEMrush, SWA rates optimization, readability, tone, and originality. Integrates with Docs and WordPress for workflow convenience.

Key Features

  • Optimization score (0–10).
  • Readability scoring with sentence-level tips.
  • Keyword suggestions based on target terms.
  • Tone of voice checker and basic originality checks.

Pros

  • Tight integration with popular editors.
  • Good for teams already living in SEMrush.

Cons

  • Free tier is very limited and pushes upgrades.
  • Some recommendations feel checklist-like vs. context-aware.

Best for: Teams already on SEMrush needing content guidance in their stack.

Our rating: 8.5/10 (paid) / 6/10 (free)

3) Yoast SEO (WordPress)

What it does: The classic in-editor WordPress plugin that checks keyword placement and readability, and helps with meta/snippets.

Key Features

  • Focus keyphrase analysis across title/meta/H1/H2s/body.
  • Readability “traffic light” system.
  • Internal linking suggestions (premium).
  • Google preview and schema help.

Pros

  • Native WordPress flow.
  • Great for editorial basics across a large blog.

Cons

  • WordPress-only.
  • Can push writers into rigid patterns if followed too literally.
  • Free tier lacks synonym/variation analysis.

Best for: WordPress-native editing; editorial hygiene at scale.

Our rating: 8.0/10

4) Grammarly

What it does: World-class grammar/style assistant with clarity and tone guidance; not a dedicated SEO grader.

Key Features

  • Grammar, spelling, punctuation.
  • Clarity rewrites and tone adjustments.
  • Style and engagement suggestions.
  • Plagiarism (premium).

Pros

  • Excellent for polish and voice.
  • Great final pass for human readability.

Cons

  • No keyword, semantic, or heading coverage analysis in free tier.
  • Not built for SEO grading.

Best for: Making prose tighter and more readable, alongside an SEO grader.

Our rating: 7.5/10 (as an SEO tool)

5) Hemingway Editor

What it does: A distraction-free readability app highlighting hard sentences, adverbs, and passive voice.

Key Features

  • Readability grade and sentence highlights.
  • Flags complex phrasing and passive voice.
  • Simple interface for clarity edits.

Pros

  • Perfect for cutting fluff and friction.
  • Forces clarity that users (and search) reward.

Cons

  • Zero SEO signals (keywords, headings, semantic coverage).
  • Pair it with a grader for on-page work.

Best for: Final clarity pass.

Our rating: 7.0/10 (content clarity)

6) Google PageSpeed Insights

What it does: Technical performance grader for URLs (Core Web Vitals). Not a content grader.

Key Features

  • Performance score (0–100), LCP/INP/CLS detail.
  • Diagnostics and opportunities by device.
  • Field vs. lab data.

Pros

  • Must-use for technical SEO/site UX.
  • Clear, actionable dev tasks.

Cons

  • No content insights at all.
  • Use alongside a content grader.

Best for: Developers/SEOs focusing on site performance.

Our rating: 6.5/10 (as a content tool)

7) Ahrefs' Free Writing Tool

What it does: A lightweight AI writer/brainstormer; not a true SEO grader.

Key Features

  • Idea generation and tone changes.
  • Some outline help.

Pros

  • Good for breaking blank-page syndrome.

Cons

  • No structured grading, keyword placement, or semantic coverage.
  • Export/reporting limited on free tier.

Best for: Early ideation before grading elsewhere.

Our rating: 6.0/10

How to Actually Use a Grader to Rank

  1. Paste text + set a target keyword.
    Keep the keyword explicit (e.g., “best free seo grader tools”).

  2. Fix the top 3 issues first.
    Typical quick wins: add keyword to one H2; rewrite a 40–50 word opening sentence; add 2 semantic terms.

  3. Improve coverage with semantic terms.
    These are context words readers expect. Add naturally to headings or list items.

  4. Restructure for scanning.
    Break long blocks, add subheads every ~200–300 words, use bulleted lists.

  5. Re-grade and stop at A/A- when it still reads naturally.
    Over-optimizing makes content stiff—don’t chase A+ at the expense of voice.

Example: From B- to A in 5 Minutes

  • Issue: Keyword missing in subheadings.
    Fix: Add 1 H2 with exact phrase; add synonym in another H2.

  • Issue: Sentences average 28–30 words.
    Fix: Split two long sentences; add one transitional sentence.

  • Issue: Thin intro (no search intent match).
    Fix: Add one line that promises outcome + timeline (“paste → instant grade”).

  • Issue: Missing internal links.
    Fix: Add links to your related guides (below).

  • Issue: Missing semantic terms.
    Fix: Insert 2–3 high-relevance terms in natural spots.

Re-grade → typically jumps one letter grade with these moves.

Ready to Grade Your Content Like a Pro?

Stop guessing. Use a grader that shows what to fix and why—in real time.

✅ Free & instant grading
✅ Readability + keyword density + semantic coverage
✅ Clear, prioritized recommendations
✅ Export PDF/CSV for sharing and revision history

FAQ

Is there a truly free SEO grader that works instantly?

Yes. WordCount AI’s grader works without signup and returns a letter grade, readability, density, and prioritized fixes.

Will an SEO grader replace a full SEO suite?

No. A grader is perfect for on-page content. For technical SEO, site architecture, and backlinks, you’ll still want dedicated tools.

Should I always chase an A+ grade?

No. A/A- with natural, clear prose beats A+ with stilted, stuffed text. Optimize for readers first, then polish signals.

How often should I re-grade?

When you change target keywords, when adding new sections, or after a readability edit sweep. Many teams re-grade at outline, draft, and final.

Does word count matter for SEO?

Not directly. Coverage and clarity matter. See our guide: SEO Word Count: A Data-Driven Guide.