Key takeaways
- A LinkedIn post holds up to 3,000 characters, yet the feed shows only about 210 of them on desktop and about 140 on mobile before "...see more".
- The generator turns a short description of your post into several caption drafts that stay inside that limit.
- Document carousels are PDFs shown as slides, 1080 px wide and up to a 4:5 portrait ratio.
- Image posts work at 1200 x 627 horizontal or up to 4:5 vertical, with up to 20 images of 10 MB each.
- The tool is free on this page and needs no account.
The LinkedIn caption generator writes several caption options from a short description of your post and keeps each one under LinkedIn's 3,000-character limit. You pick the draft you like, rewrite it in your own words and paste it into LinkedIn.
How do you use the LinkedIn caption generator?
- Describe the post
Say what the post covers, the tone you want and the one thing you would like readers to do at the end. - Get the drafts
The tool returns a set of captions written for the LinkedIn feed, each with a different opening. - Choose and edit
Take the closest draft, change the wording until it sounds like you, then paste it into the LinkedIn post box.
Treat every draft as raw material. A caption you have reworked reads like a person wrote it, and readers on LinkedIn notice the difference fast.
How long can a LinkedIn caption be?
LinkedIn accepts up to 3,000 characters in a post. The catch is the fold: after roughly 210 characters on a desktop screen and about 140 on a phone, the rest of the text hides behind "...see more". Readers decide whether to open it based on those first lines alone.
If you want to check a finished caption against the limit and the fold, paste it into the LinkedIn character counter, which shows the desktop and mobile cut separately.
Which LinkedIn formats can you write captions for?
Text-only post
You get the full 3,000 characters. The opening has to make sense before the cut, which sits near 210 characters on desktop and 140 on mobile.
Document carousel
LinkedIn shows an uploaded PDF as slides people swipe through. Design the pages 1080 px wide, with a portrait ratio of up to 4:5. The caption above it only needs to say what the slides teach.
Image post
Use 1200 x 627 for a horizontal image, or go vertical up to 4:5. One post can carry up to 20 images, each no larger than 10 MB. The caption explains what the picture shows and why it is there.
Article or newsletter
Long-form pieces live outside the feed post limit, but the headline is capped at 100 characters, so the generator keeps headline ideas short.
What do good caption templates look like?
The drafts follow a few patterns with [placeholders] that you replace with your own facts.
Opening line plus a short story
A first sentence that fits inside about 140 characters, followed by the story told in short lines with plenty of white space.
Caption for a carousel
One sentence on what the reader will learn from the slides, then a question that invites a reply.
Caption for a photo
Where and when the photo was taken, plus one line on why it matters to the reader.
What makes a LinkedIn caption work?
Put the reason to keep reading inside the visible part of the post. Give context in short lines that are easy to scan on a phone. Finish with a single request, such as a comment, a save or a follow, so the reader knows what to do next.
Which styles does the generator offer?
Hook up front
The sentence above the fold carries the whole post, so every draft starts with it.
Short lines
One idea per line, which reads comfortably on a small screen.
A single ask
Each caption ends with one question or one action, never three.
Hashtags last
Tags go at the bottom, where they cannot push your opening below the cut.
Free tools to finish the post
- LinkedIn Hook Generator for more opening lines
- LinkedIn Hashtag Generator for the tags at the end
- LinkedIn Character Counter to check length and the fold
- LinkedIn Post Generator for a full post draft
- LinkedIn Post Ideas Generator when you need a topic
- All free LinkedIn tools
What should you do after the caption is written?
A clear caption gets the first glance. What carries a post beyond your own followers is the reactions and comments it collects in the first hours.
On LinkedInLikes, members react to each other's posts by hand from their own accounts. You sign up with email, get 100 starter points, paste your post link and choose how many reactions you want. You get more points by reacting to other members' posts.
More ways to grow on LinkedIn
Frequently asked questions
Yes. You can use it on this page at no cost and without creating an account.
A LinkedIn post takes up to 3,000 characters. Only about 210 show on desktop and about 140 on mobile before the "...see more" link.
Near 210 characters on desktop and near 140 on mobile. Keep the line that makes people click inside that space.
Long enough to give the reader context, with the opening line placed above the fold. Many good captions are a few short paragraphs, not the full 3,000 characters.
It decides whether people open the full post. A caption that says early what the post is about gives readers a reason to click "...see more" and reply.
A PDF that LinkedIn displays as slides people swipe through. Pages work best at 1080 px wide with a portrait ratio of up to 4:5.
OutX describes three stages: a quality filter in the first 15 minutes, a test of early reactions that runs up to 90 minutes, and wider distribution for up to 48 hours when reactions and comments come in strongly.
According to OutX, a comment carries about 3x the weight of a reaction when LinkedIn decides how far to show a post.