Free AI Proofreader — Fix Grammar, Spelling, and Style Instantly
Settings
What AI Proofreader does
Perform Ai Proofread operations directly in your browser with enterprise-grade security.
When to use AI Proofreader
Perfect for professionals and students who need to execute Ai Proofread tasks quickly and securely online.
How to use AI Proofreader
Paste text or upload your document
Let AI scan and correct all grammar, spelling, punctuation, and style errors
Review suggestions and download the improved version
Good to know about AI Proofreader
- Your files are processed securely and never stored permanently
- Files are automatically deleted after 24 hours
- Secure server-side processing for complex tasks
About AI Proofreader
The ultimate Ai Proofread tool. Run complex document operations without installing any software. All processing is done on secure cloud servers.
AI Proofreader — Catch Every Error, Improve Every Sentence
If you're a non-native English speaker, you're not alone in struggling with common writing challenges. Missing articles, incorrect prepositions, and direct translation from your native language can make your writing seem stilted or even embarrassing. But fear not — Plainscan's AI Proofreader is here to help.
This powerful tool is specifically designed to identify and correct the most common ESL writing mistakes, all while keeping the intended meaning intact. Whether you're writing a business email, academic paper, or marketing content, Plainscan's AI Proofreader will help you produce natural, fluent, and grammatically correct content.
How It Works
Paste or Upload Your Content
Paste your text or upload a DOCX or PDF file — whether it's a quick email, a lengthy academic paper, or a business proposal, the AI can analyse and improve it with ease.
AI Analyses Your Writing
The AI automatically checks for grammar mistakes, spelling errors, punctuation issues, tone, clarity, style, and readability. It identifies improvements that make your writing clearer and more professional.
Review Tracked Changes
Every modification is highlighted — insertions, deletions, rewrites, and stylistic improvements — giving you complete control over the final text.
Copy or Download
When you're happy with the changes, copy the corrected text or download the updated document for immediate use.
What the AI Proofreader Corrects
- Grammar and spelling errors
- Punctuation mistakes
- Missing words and incorrect articles
- Preposition misuse
- Sentence fragments and run-on sentences
- Passive voice
- Repetitive wording and redundant phrases
- Awkward phrasing and unclear expressions
- Inconsistent tone and formatting
- Homophones and tense inconsistencies
Multiple English Standards
Plainscan supports multiple English standards and automatically adjusts spelling, punctuation, and style conventions based on your selected language preference. Supported variants include:
- American English
- British English
- Australian English
- Other regional standards
Beyond Spell-Check — What AI Proofreading Catches
The proofreader also identifies unclear wording, sentence fragments, run-on sentences, inconsistent capitalisation, formatting inconsistencies, and readability issues.
| Error Type | Example | AI Fix |
|---|---|---|
| Homophones | their going to the meeting | they're going to the meeting |
| Missing Articles | I have meeting at 3pm | I have a meeting at 3pm |
| Preposition Errors | I am interested on this role | I am interested in this role |
| Tense Inconsistency | We launched and are finishing the report | We launched and finished the report |
| Passive Voice | The report was submitted by the team | The team submitted the report |
| Redundant Phrases | Due to the fact that | Because |
Plainscan vs Grammarly
| Feature | Plainscan | Grammarly Free | Grammarly Premium |
|---|---|---|---|
| Grammar correction | ✓ | ✓ | ✓ |
| Style & clarity suggestions | ✓ | ✗ | ✓ |
| Tone recommendations | ✓ | ✗ | ✓ |
| DOCX upload support | ✓ | ✗ | ✓ |
| PDF upload support | ✓ | ✗ | ✓ |
| Tracked changes | ✓ | Limited | ✓ |
| Price | Free | Free (limited) | $12–$30/month |
| Word limit | None | Limited | None |
| Signup required | No | Yes | Yes |
Common Use Cases
Professional Email Proofreading
Check your business emails before sending to ensure professional communication and eliminate embarrassing mistakes.
Academic Writing
Improve essays, research papers, assignments, dissertations, and academic reports.
Business Proposals & Reports
Create polished documents with consistent tone and professional language.
Blog Posts & Website Content
Improve readability, SEO content quality, and user engagement.
Resume & Cover Letter Review
Make job applications clearer, stronger, and more professional.
ESL Writing Assistance
Help non-native English writers produce natural, fluent, and grammatically correct content.
Why Use AI for Proofreading?
Writing professional emails and documents often takes more time than expected. Finding the right words, maintaining a professional tone, organising ideas clearly, and avoiding grammatical mistakes can be challenging — especially when communicating with clients, recruiters, executives, or customers. Plainscan's AI Proofreader eliminates this effort by generating polished, corrected drafts instantly while preserving professionalism and clarity.
Frequently Asked Questions
How do I proofread text with AI for free?
Simply paste your text or upload a DOCX or PDF file to Plainscan's AI Proofreader. The AI will analyse your content and provide tracked corrections that you can review and accept at your own pace.
Is it better than traditional spell-check?
Yes. Traditional spell-check only detects spelling mistakes and a limited set of grammar errors. Plainscan's AI Proofreader identifies a much wider range of issues, including homophones, article usage problems, tense inconsistencies, passive voice, awkward phrasing, readability issues, and tone mismatches.
Does it show what changes were made?
Yes. All modifications are displayed as tracked changes so you can review every correction before accepting it.
Can I proofread a full document?
Yes. You can upload DOCX and PDF files or paste long-form content, including reports, essays, proposals, and articles.
Does it support British and American English?
Yes. You can select your preferred English variant and the proofreader adapts spelling and style conventions accordingly.
Does it work for ESL writing?
Yes. The tool is particularly effective at correcting common mistakes made by non-native English speakers, including article usage, prepositions, tense consistency, and translation-influenced phrasing.
Can it improve writing style and clarity?
Yes. In addition to fixing errors, the AI rewrites awkward sentences, removes unnecessary wording, improves readability, and enhances overall flow.
Can I upload DOCX and PDF files?
Yes. The proofreader supports both DOCX and PDF document uploads for full-document proofreading.
Is it free compared to Grammarly?
Yes. Plainscan provides grammar correction, style suggestions, tone analysis, document uploads, and proofreading features without requiring a paid subscription.
Privacy & Security
Your uploaded content is processed securely and documents remain private during proofreading. The tool focuses solely on improving grammar, style, clarity, and readability. Plainscan provides a free and secure service you can trust.