Free Grammarly AI checker alternative
Detect AI writing without an account or a browser extension. Free, private, and nothing you paste is kept.
Check your textHow to read your AI detector score
The AI detector gives you a single number from 0 to 100. It is the estimated chance that AI wrote the text, not a yes or no. Here is what each band means.
Probably a person
Reads like human writing. We did not pick up the patterns a model tends to leave behind.
Hard to say
Some of it leans one way, some the other. Read it yourself before you draw a conclusion.
Probably AI
This has the marks of machine-written text. Read it closely before you conclude anything.
How this Grammarly alternative works
Three steps, a few seconds, no setup.
Add your text
Paste it, upload a Word or PDF file, or drop in a link to the page you want to check.
We check the patterns
The model weighs your text against the patterns of AI writing and human writing, the same kind of check Grammarly's AI detection runs.
Read the score
You get a number from 0 to 100 and a plain read on how likely AI was involved.
AI Detector vs Grammarly
Grammarly is built to improve your writing, and its AI detection is one feature among many. Its free web detector is genuinely good, but it sits inside a broader assistant that nudges you toward Pro and its Authorship tracking. This tool does one thing: it tells you how likely it is that AI wrote a piece of text, and it also reads Word and PDF files and web links, not just pasted text.
| At a glance | RoboSnitch | Grammarly |
|---|---|---|
| Price | Free | Free web detector, more in Pro |
| What it is | A dedicated AI detector | A writing suite; detection is one feature |
| Account | None needed | None for the free web detector |
| Extras | Just detection | Grammar, tone, Authorship, citations |
| Input | Paste, Word, PDF, or link | Paste or upload |
When to use which
If you want grammar help, tone suggestions and AI detection rolled into your daily writing, Grammarly makes sense. If you just need a quick, private read on whether a specific piece of text is AI-written, with no Pro upsell and the option to upload a file or a link, a dedicated checker is simpler.
Where your text goes
The check happens in memory on our own server. As soon as you have a score, your text is dropped. No logs, no database, no training set.
There is no account holding a history of your checks either.
Grammarly AI checker FAQ
Is this a free Grammarly alternative?
Yes. It's free with no account or extension, and it isn't affiliated with Grammarly.
How is this different from Grammarly's checker?
Grammarly's free detector is good, but it's part of a writing suite. This is a focused detector that also takes files and links, with no Pro upsell.
Is Grammarly's AI checker accurate?
It's reasonable, but like every detector it can be wrong. Treat any tool's score as a signal, not proof.
Do you store my writing?
No. It's analyzed in memory and dropped as soon as you get a score.
Which AI models does it catch?
A broad mix, including ChatGPT, Claude, Gemini and Llama.