ToolSpotAI

Free AI Writing Style Checker

Lightweight heuristics on sentence length, word variety, and a few overused patternsโ€”editing help, not a courtroom AI detector. This tool runs in your browserโ€”no account required.

Developer

Honest limitation: this does not scan model weights or the internet. It uses simple heuristics writers use to tighten draftsโ€”useful for editing, not for accusing someone of using AI.

Readability-style score

84

Higher = more varied, less โ€œtemplateyโ€ by our crude rulesโ€”not a label of human vs machine.

  • Words: 28
  • Sentences: 2
  • Avg words / sentence: 14.0
  • Lexical diversity: 89%
  • Passive-style hits: 0
  • Generic buzzword hits: 0

How to Use This AI Writing Style Checker

  1. We tokenize words roughly, estimate sentences, compute average length, a simple uniqueness ratio, count a handful of passive-voice-shaped patterns, and flag a short list of buzzwords that show up in bland marketing copy.
  2. The score blends those signals into a single number for convenience.
  3. It is not calibrated like a standardized testโ€”think โ€œdirectionally useful,โ€ not โ€œforensic.โ€

What is AI Writing Style Checker?

Everyone wants a magic button that labels text โ€œhumanโ€ or โ€œmachine.โ€ Outside specialized labs and productized APIs with their own limits, most sites should not pretend. What we offer instead is closer to what a careful editor does on a first pass: look at whether sentences all sound the same length, whether vocabulary repeats a little too cleanly, and whether a few tired filler phrases show up too often. That can help you revise drafts so they sound more like youโ€”not because the score is gospel, but because the stats point at where readers might tune out.

Formula

Score = clamp( base + f(diversity, sentence length) โˆ’ g(passive, buzzwords) , 0, 100 ) โ€” illustrative weighting

Formula Explained

Weights favor diverse vocabulary and varied pacing, and nudge down uniform, passive, buzzword-heavy prose. You can disagree with the score and still use the breakdown lines to edit.

Example

A short email might score higher than a dense legal memoโ€”not because the memo is AI, but because the memoโ€™s uniformity looks similar to naive measures. Context always wins.

Tips & Best Practices

  • โœ“Read aloud: if you stumble, the reader will too.
  • โœ“Swap a few generic adjectives for concrete nouns and verbs.
  • โœ“Break up strings of medium-length sentences with a short one.

Common Use Cases

  • โ€ขBloggers tightening drafts before publish
  • โ€ขStudents learning editing skillsโ€”not cheating policies

Frequently Asked Questions

No. It does not inspect model internals or compare against a database of AI text. It applies simple statistics and pattern counts humans also use when line-editing.

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