Last updated: March 2026
What Is the AI Paraphraser?
The AI Paraphraser is a free tool that completely rewrites your text in five distinct styles. Unlike a grammar checker or writing improver that polishes your existing words, the Paraphraser generates entirely new sentence structures and vocabulary while preserving your original meaning.
Choose from five rewrite modes: Standard swaps all words and sentence structures, Fluency focuses on natural flow and rhythm, Creative adds vivid language and metaphors, Formal elevates to academic tone, and Simple brings text down to a sixth-grade reading level. Select all five at once to compare approaches side by side.
The diff highlighting feature shows exactly which words changed between the original and rewritten text, making it easy to see and understand the differences. Use the "Replace Original" button for iterative rewriting — keep refining until the text is perfect.
How to Use the AI Paraphraser
Paste your text. Enter up to 2,000 characters of text you want to rewrite. The tool works best with paragraphs of 50-300 words.
Choose a mode. Select a single mode for a focused rewrite, or choose "All 5 Modes" to see every variation at once. Each mode produces genuinely different output.
Compare and iterate. The side-by-side view with color-coded diff highlighting makes it easy to see exactly what changed. Click "Replace Original" to use a rewrite as your new starting point for further refinement.
Key Features
Five rewrite modes cover every use case from casual simplification to formal academic writing, with genuinely different output for each mode.
Diff highlighting uses red for removed words and green for added words, so you can see exactly what changed at a glance.
Iterative rewriting lets you replace the original with any rewrite and continue refining until the text is exactly what you need.
Stats per rewrite show word count, readability grade, and percentage of words changed from the original.
Frequently Asked Questions
How is this different from the AI Writing Improver?
The Writing Improver fixes grammar and polishes existing text. The Paraphraser completely rewrites text using different words and sentence structures while keeping the same meaning.
Does it detect plagiarism?
No, but using the Standard or Creative modes produces text different enough from the original to avoid plagiarism detection in most cases.
Can I rewrite in multiple modes at once?
Yes. Select 'All 5 Modes' to see your text rewritten in Standard, Fluency, Creative, Formal, and Simple simultaneously.
Do I need an API key?
Yes. You need a free Anthropic API key from console.anthropic.com. The tool calls Claude AI directly from your browser. Your key is stored only in your browser's local storage.
What's the character limit?
You can rewrite text up to 2,000 characters per request. For longer text, break it into sections and rewrite each one separately.