Is this better than Grammarly?

Grammarly excels at real-time suggestions. The AI Grammar Editor is better when you want batch correction of a whole essay, need paraphrasing or humanization in the same workspace, or want to run AI detection on the corrected output.

Can it check essays and research papers?

Yes. Pro supports 1,500 words per run and Ultra supports 3,000 — enough for most essays. Split dissertations into chapters.

Does it work in languages other than English?

Yes — 29 languages including Spanish, French, German, Chinese, Arabic, and Hindi. Select the language in the editor settings.

Is my text stored privately?

Every run saves to your private history. Nothing is shared or used to train models.

SupWriter

AI Grammar Editor

AI Grammar Editor — more than a grammar checker

Q: What's the difference between Basic, Thorough, and Style modes?

Basic catches spelling and grammar errors. Thorough adds punctuation and clarity issues. Style rewrites sentences for readability and flow. Basic is free; Thorough and Style are available on Pro and Ultra plans.

Fix grammar, spelling, punctuation, and clarity in one editor. Choose Basic, Thorough, or Style mode — each tuned for a different level of polish.

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No credit card required · 300 free credits

Humanize

Paraphrase

Grammar

Detect

142 / 1,500 words

EN · Casual

Mode: Thorough

Output

12 past runs

1,247 credits

Humanize AI Writing in 3 Simple Steps

Transform AI-generated content into natural, human-like text that bypasses detection

Step 1

Your Text

Paste your AI-generated text here

Paste Your AI-Generated Text

Copy any content — assignments, blog posts, or AI-generated text.

Step 2

Result

HUMAN WRITTEN

Check AI Score

See how much of your text is flagged as AI-written by detection systems.

Step 3

or select text & ask AI

Ask or type your prompt...

Edit or review selection

Improve writing

Fix grammar

Make shorter

Make longer

Use AI to do more

Continue writing

Humanize & Improve selection

Transform your text to sound 100% human-written. Select any text to improve, fix the grammar, shorten, or lengthen it.

Benefits

Why writers pick this over a one-click tool

Three grammar modes

Basic catches errors. Thorough flags punctuation and style. Style rewrites for readability and flow.

Fixes more than grammar

Spelling, punctuation, fluency, redundancy, and awkward phrasing — all in one pass.

Works on any format

Essays, emails, blog posts, research papers. Up to 3,000 words per run on Ultra.

Grammar in 29 languages

Not English-only. Check grammar in Spanish, French, German, Chinese, Arabic, Hindi and more.

SupWriter vs. Other AI Humanizers

See why SupWriter consistently ranks as the most effective humanizer for avoiding AI detection, preserving tone, and optimizing readability.

Features	SupWriter	-	-
Human Score	99%+	85%	90%
Turnitin
GPTZero
Originality.ai
Multilingual Support	100+ Languages	English Only	5 Languages
Built-in AI Detector
Plagiarism-Free Output
Meaning Preservation	High	Medium	Medium
Processing Speed	Fast (<25s)	Slow (2+ min)	Medium (1 min)
Fix Selection
Free Trial	300 Words	100 Words	No Trial
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What Our Users Say

Thousands of writers trust SupWriter every day

FAQ

AI Grammar Editor — common questions

Basic catches spelling and grammar errors. Thorough adds punctuation and clarity issues. Style rewrites sentences for readability and flow. Basic is free; Thorough and Style are available on Pro and Ultra plans.

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