Run-On Sentence Checker
Detect and fix run-on sentences, comma splices, and overly long sentences. Break complex ideas into clear, readable writing.
Try it free — no signup needed
See the Difference
Before
I went to the store and I bought some groceries and then I went home and I started cooking dinner but I realized I forgot to buy onions so I had to go back.
After
I went to the store and bought some groceries. When I got home and started cooking, I realized I forgot onions — so I had to go back.
Before
The project was delayed because the team was waiting for approval from management, the client hadn't sent the final specifications yet, and there were several bugs that needed to be fixed before launch.
After
The project was delayed for several reasons. The team was waiting for management approval, the client hadn't sent final specifications, and several bugs still needed fixing before launch.
Before
She said she would come to the meeting however she didn't show up, we waited for an hour then we decided to start without her.
After
She said she would come to the meeting. However, she didn't show up. After waiting for an hour, we decided to start without her.
How It Works
Paste Your Text
Type or paste your text into the editor above. Up to 500 characters in the free tool.
AI Processes It
Our AI analyzes your text for improvements and generates a polished version in seconds.
Copy & Use
Copy the improved text with one click. Install the extension for unlimited use on every website.
Why Use This Tool
Detects Run-On Sentences
AI identifies sentences that are too long, have comma splices, or string too many clauses together.
Smart Sentence Breaking
Breaks long sentences at natural points — using periods, semicolons, and transitional phrases where appropriate.
Improves Readability
Shorter, well-structured sentences are easier to read and understand, especially for professional communication.
Great for Academic Writing
Perfect for essays, research papers, and dissertations where sentence clarity is critical.
Who Is This For?
Students
Professionals
ESL Speakers
Content Writers
What Users Say
“Finally a tool that understands non-native English! My emails sound so much better now.”
Priya S.
Software Engineer
“I use this before every important email. The suggestions are always natural and professional.”
Yuki T.
Product Manager
“Way better than Grammarly for my needs. It catches mistakes other tools miss.”
Carlos M.
Marketing Lead
FluentEditor vs Other Tools
| Feature | FluentEditor | Grammarly | QuillBot |
|---|---|---|---|
| Built for Non-Native Speakers | ✅ | ❌ | ❌ |
| Free to Use | ✅ 200/mo | ❌ 5/day | ✅ Limited |
| Catches ESL Patterns | ✅ | ❌ | ❌ |
| Explains Corrections | ✅ | ✅ (Premium) | ❌ |
| Chrome Extension | ✅ | ✅ | ✅ |
| Works on 40+ Sites | ✅ | ✅ | ❌ |
| No Account Required | ✅ 5/day | ❌ | ✅ |
| Pattern Tips for Learning | ✅ | ❌ | ❌ |
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