LinkedIn AI Post Checker
Paste a LinkedIn post before you publish it. You'll see every word, phrase and sentence pattern readers link with AI writing, highlighted in your text, and whether the post says anything only you could say. Free, and nothing leaves your browser.
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What it checks
The same rules Postbrander applies to every draft it writes: 110 words, 44 stock phrases and 39 sentence patterns that turn up again and again in AI writing. The patterns matter most. A sentence that names one idea only to knock it down and replace it is the habit readers spot fastest, so it costs the most points.
It doesn't guess who wrote the post. It shows you what a reader will notice, so you can change it. A separate specificity check looks for things only the author could know: something that happened, a number, a name, a quote. That matters since LinkedIn added a "Seems like AI slop" report button.
Need a draft to start from? Try the AI LinkedIn post generator. For length, hashtags and format, use the post analyser, and add emphasis with the formatter.
Frequently asked questions
Can this tell whether AI wrote a LinkedIn post?+
No, and it doesn't try. Tools that claim to detect AI writing are unreliable; OpenAI withdrew its own classifier in 2023 for low accuracy. This checks for the habits readers notice: 110 words, 44 stock phrases and 39 sentence patterns that turn up again and again in AI drafts. A person can write them too, and they read just as badly.
Why does it matter if a LinkedIn post sounds like AI?+
Readers scroll past posts that sound generic, and LinkedIn now lets members report a post as 'Seems like AI slop'. LinkedIn says those reports help train the systems that decide who outside your network sees a post. A post that sounds like you, with a detail only you could know, avoids both problems.
What does the specificity check do?+
It looks for signs the post came from real experience: something that happened to you, a number, a named person or place, a quote, a firm opinion. A post with none of those reads as if anyone could have written it, even when no AI words appear. Add one real detail and the verdict changes.
Is my post sent anywhere?+
No. The check runs in your browser and nothing you paste is sent to Postbrander or anyone else. Close the page and it's gone.
How is this different from Postbrander?+
This checks a post you've already written. Postbrander writes posts in your voice from your own material, runs the same checks before you see each draft, removes any detail it added that you never gave it, then schedules the post and shows how it did. The free plan covers 7 posts a month.