How to Use RewriteFast
Master AI-powered content rewriting with this comprehensive guide to all features and workflows.
Getting Started
1. Enter Your Text
Paste or type your content into the input area on the homepage. You can enter up to 25,000 characters at once. The character counter at the bottom will show your current usage.
💡 Tip: Copy text from Word, Google Docs, or any other source - formatting will be automatically cleaned.
2. Choose a Rewriting Mode
Select from 5 AI-powered rewriting modes based on your needs:
- Standard: Balanced rewriting that maintains natural flow - perfect for general content
- Fluent: Smooth, professional language - ideal for business documents and reports
- Creative: Unique, expressive variations - great for marketing copy and creative writing
- Formal: Professional, business-appropriate tone - best for official communications
- Casual: Friendly, conversational style - perfect for blogs and social media
3. Click Rewrite
Press the "Rewrite Text" button or use the keyboard shortcut Cmd/Ctrl + Enter to start the AI rewriting process.
⏱️ Processing typically takes 2-5 seconds for standard text. Large texts (20,000+ characters) are processed in chunks and may take longer.
4. Review & Export
Your rewritten text appears in the right panel. Review it carefully, then:
- Copy to clipboard with Cmd/Ctrl + C
- Export as Word document (.docx)
- Export as PDF
- Export as HTML or rich text
- Share via URL (encodes your work in the link)
Advanced Features
Comparison View
Toggle the comparison view to see your original and rewritten text side-by-side:
- Green highlights show added words
- Red highlights show removed words
- Blue highlights show changed words
- % Change indicator displays how much text was modified
🔑 Shortcut: Press Cmd/Ctrl + K to toggle comparison view
Tone Adjuster
Fine-tune your text's tone with the interactive tone slider:
- Select text in the rewritten panel (or leave empty to adjust entire document)
- Move the tone slider or click preset buttons: Casual, Friendly, Neutral, Professional, Formal
- AI instantly adjusts the tone while keeping the meaning intact
💡 Tone adjustments are cached client-side, so switching back to a previous tone is instant!
Sentence Mode (Advanced Rewriting)
For granular control, switch to Sentence Mode:
- Click the "Sentence Mode" button to analyze text by sentences
- Each sentence gets a ↻ Rewrite Again icon - click to generate 2-3 alternatives
- Select your preferred alternative from the dropdown menu
- Use "Rewrite All Sentences" to process the entire document at once
- Undo/redo stack tracks all sentence-level changes
Word-Level Synonym Replacement
In comparison view, click any highlighted word to see synonym alternatives. This feature gives you precise control over individual word choices.
History & Favorites
RewriteFast automatically saves your rewrites locally:
- Open history sidebar with Cmd/Ctrl + H
- Search by keyword or date range to find past rewrites
- Pin favorites with the ⭐ icon for quick access
- Filter by mode (e.g., show only "Creative" rewrites)
- Sort by date, length, or mode
- Export history as JSON backup to transfer between devices
- Import history from JSON backup on new device
🔒 All history is stored in your browser using IndexedDB - nothing is sent to our servers!
Keyboard Shortcuts
| Shortcut | Action |
|---|---|
| Cmd/Ctrl + Enter | Rewrite text with selected mode |
| Cmd/Ctrl + K | Toggle comparison view |
| Cmd/Ctrl + C | Copy rewritten text to clipboard |
| Cmd/Ctrl + H | Open/close history sidebar |
| Cmd/Ctrl + E | Open export menu |
Best Practices & Tips
✅ Do's
- Always review rewritten content before publishing or submitting
- Use comparison view to verify meaning wasn't changed
- Try different modes to see which produces the best results for your content
- Use sentence mode for precise control over complex paragraphs
- Export history regularly as JSON backup to prevent data loss
- Cite sources appropriately when paraphrasing third-party content
❌ Don'ts
- Don't blindly trust AI output - always verify facts and meaning
- Don't use for plagiarism - rewriting doesn't replace proper citations
- Don't paste sensitive information - text is sent to Vercel AI Gateway for processing
- Don't exceed character limits - may result in incomplete rewrites
- Don't rely solely on formal mode - combine with manual editing for best results
💡 Pro Tips
- Break very long documents into sections for better quality results
- Use tone adjuster to refine specific paragraphs after initial rewrite
- Pin frequently used rewrites for quick reference
- Compare multiple modes side-by-side by rewriting the same text in different modes
- Use the % change indicator to gauge how much rewriting occurred
- For academic content, stick to Formal mode and review carefully
Troubleshooting
Rewriting Failed or Timed Out
Causes: Network issues, API overload, or text too long
Solution: Check your internet connection, try again in a few moments, or break text into smaller chunks.
History Not Showing
Causes: Browser cleared cache, or using private/incognito mode
Solution: History is stored in IndexedDB - if browser storage is cleared, history is lost. Export regularly as backup!
Export Not Working
Causes: Browser blocks download, or no rewritten text to export
Solution: Ensure you've rewritten text first. Check browser download settings if file doesn't save.
Need More Help?
Check out our Frequently Asked Questions page for answers to common questions, or review our Privacy Policy to learn how your data is handled.
RewriteFast is designed to be intuitive and powerful. With these tips, you'll master AI-powered rewriting in no time!
For additional content tools, visit QuickRef.dev for interactive developer reference playground.