How does the LinkedIn post grader work?

Two layers. A set of instant checks runs in your browser as you type — length against the 3,000-character limit, whether your hook survives the ~140-character mobile fold, paragraph density, hashtag count, outbound links, and whether the post invites a reply. Those need no signup and no waiting. The AI grade then adds a score, a letter grade, a tone assessment and specific suggestions about whether the idea itself lands.

Is the LinkedIn Post Grader free?

Yes. The instant checks are unlimited and run entirely in your browser. The AI grade is free too, with a limit of 10 runs per hour to keep it available for everyone.

What makes a LinkedIn post score well?

A first line that finishes before the mobile fold, white space instead of a wall of text, one clear idea rather than three, something specific enough to be worth disagreeing with, and an ending that gives the reader something to do. Hashtag stuffing and body links both work against you.

Why does my hook matter so much?

LinkedIn shows only about 140 characters on mobile and 210 on desktop before collapsing the rest behind "see more". Most people read on a phone, so the opening line is doing nearly all the work of deciding whether the rest gets read at all.

Is my post text stored anywhere?

The instant checks run entirely in your browser and never leave it. Running the AI grade sends the post to our grading endpoint for that single request; it is not stored or used for training.

LinkedIn Post Grader

Get a score, grade, and actionable suggestions.

First result without email. Repeat use may ask for your email; AI tools allow 10 generations per hour.

Paste your LinkedIn post

497 / 3,000 charactersFirst line: 50 / ~140 shown on mobile

Instant checks

8 / 8 passed

Fits the 3,000-character limit — passed497 of 3,000 characters used.
Hook lands before the mobile fold — passedYour first line is 50 characters, inside the ~140 a phone shows.
Opens with a line break, not a wall — passed5 paragraphs. White space is what makes a post look quick to read.
No paragraph runs too long — passedLongest paragraph is 228 characters.
Invites a reply — passedHeuristic: looks for a question or an explicit ask. Posts that end on a statement give the reader nothing to do.
Hashtags kept in check — passedNo hashtags. Fine — a few relevant ones help discovery, but they are not required.
No outbound link in the body — passedNo external link in the post body.
Opening avoids a worn phrase — passedHeuristic: checks the first 120 characters against common filler openers.

Built by Ayush

Founder, ThoughtMint · builds LinkedIn content tools for creators and marketers

Last reviewed: September 2026·Free · 10 AI grades / hour·Instant checks run in browser

Not sure why a post flopped—or whether a draft is ready to publish? A LinkedIn post grader gives you an instant second opinion: a score, a grade, and the specific fixes that make the post land harder.

What Is a LinkedIn Post Grader?

A LinkedIn post grader analyzes your draft against the things that actually drive reach and engagement—hook strength, clarity, emotional pull, structure, and a clear call to action—then returns a score out of 100 with a plain-English breakdown. Instead of guessing, you see exactly which part of the post is weak before you hit publish.

How to Use the Post Grader

Paste your finished LinkedIn post—or a rough draft—into the box above. The instant checks update as you type: length, where the hook gets cut on mobile, paragraph density, hashtags, links, and whether the post invites a reply. Those cost nothing and need no signup. When the mechanics are right, hit “Add the AI grade” for a score, a letter grade, a read on the post's biggest strength, a tone assessment, and concrete suggestions.

What Your Score Actually Measures

The grade weighs five things every strong LinkedIn post gets right: a hook that stops the scroll in the first two lines, clarity that survives a skim, an emotional or contrarian angle that earns a reaction, a structure that reads easily on mobile, and a call to action that tells people what to do next. A high score means those five are working together; a low score points you straight at the one that isn’t.

Want the rewrite done for you? ThoughtMint rewrites the post in your voice—applying the exact fixes the grader flags.

When to Grade a Post

Grade every post before you publish, and grade your best-performing past posts to learn what your audience rewards. It’s most useful on longer text posts, thought-leadership takes, and anything with a CTA—places where a weak hook or a buried ask quietly costs you reach.

Pair It With These Free Tools

Sharpen a weak opening line with the Hook Generator, check your hook fits before the “see more” fold with the Character Counter, preview the final look with Post Preview, or add bold and bullets with the Post Formatter.

Stop guessing what works.

ThoughtMint writes and refines editable drafts in your voice. Starts after your first-post setup · 7 days or 2,500 AI words, whichever comes first · No credit card required

Get Started Free

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Frequently asked questions

How does the LinkedIn post grader work?
Two layers. A set of instant checks runs in your browser as you type — length against the 3,000-character limit, whether your hook survives the ~140-character mobile fold, paragraph density, hashtag count, outbound links, and whether the post invites a reply. Those need no signup and no waiting. The AI grade then adds a score, a letter grade, a tone assessment and specific suggestions about whether the idea itself lands.
Is the LinkedIn Post Grader free?
Yes. The instant checks are unlimited and run entirely in your browser. The AI grade is free too, with a limit of 10 runs per hour to keep it available for everyone.
What makes a LinkedIn post score well?
A first line that finishes before the mobile fold, white space instead of a wall of text, one clear idea rather than three, something specific enough to be worth disagreeing with, and an ending that gives the reader something to do. Hashtag stuffing and body links both work against you.
Why does my hook matter so much?
LinkedIn shows only about 140 characters on mobile and 210 on desktop before collapsing the rest behind "see more". Most people read on a phone, so the opening line is doing nearly all the work of deciding whether the rest gets read at all.
Is my post text stored anywhere?
The instant checks run entirely in your browser and never leave it. Running the AI grade sends the post to our grading endpoint for that single request; it is not stored or used for training.