Free tool
Paste your post once and see it the way LinkedIn, X, Instagram and Threads will show it, on a phone or a desktop. You'll see exactly where each feed cuts it, how many characters you have left, and you can download the mockup as a PNG.
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Everything stays in your browser. Your text and images are never uploaded.
Alex Morgan
Founder at Northwind Studio · Writing about building in public
now •
Most people never read your second line. LinkedIn cuts your post after three lines. Instagram cuts it after two. Everything below that only exists for people who tap "more". So write the first lines like a headline: → Lead with the result, not the setup → Cut the warm-up sentence → Leave one question open Then check where the cut lands before you post.
LinkedIn and Instagram cut by lines, so the cut moves with screen width. X counts like X does: links as 23, emoji as 2.
Schedule it with FeedHiveThe Twitter character limit is 280 weighted characters for standard accounts; X Premium subscribers can write longer posts. The Instagram character limit for captions is 2,200, the LinkedIn post character limit is 3,000 and the Threads character limit is 500. These come from each platform's own documentation, checked on 11 October 2026.
| Platform | Limit | Where the feed cuts it |
|---|---|---|
| 3,000 characters | After 3 lines, then "…more" (about 140–160 characters on a phone, 210–250 on desktop) | |
| X (Twitter) | 280, weighted | Standard posts show in full; longer Premium posts cut after 280 with "Show more" |
| 2,200 characters | After 2 lines including your username, then "… more" (about 90–125 characters on a phone) | |
| Threads | 500 characters | Shows the whole post |
Feeds show the start of a post and hide the rest behind a "more" link. Most people decide whether to tap it from the lines they can already see, so a strong opening does most of the work.
LinkedIn and Instagram cut by lines, not by a fixed number of characters. A line break uses up a whole line, so a post that opens with three short lines can lose its third sentence below the cut. That's why the cut lands in a different place on a phone and on a desktop, and why it helps to check it before you post.
Lead with the result
Put the outcome, number or claim in the first line, and the setup after it.
Cut the warm-up
Greetings and "I've been thinking about…" use the lines people actually see.
Watch your line breaks
Each empty line costs a full line above the cut. Use them after the hook, not before it.
Check both screens
Switch between Phone and Desktop. Most people read on a phone, where the cut comes earlier.
Need a social media mockup for a pitch deck, a client approval or a portfolio? Upload a profile photo and an image, set the likes and comments, and download a sharp PNG at three times screen resolution. Everything is drawn in your browser, so nothing is uploaded.
Please don't use mockups to put words in a real person's mouth. A post mockup is for your own drafts, designs and presentations.
Paste it into the box above and pick a platform. The post preview shows your name, photo, text and image the way the feed does, including the "more" cut.
X allows 280 weighted characters for standard accounts, LinkedIn 3,000 per post, Instagram 2,200 per caption and Threads 500 per post. The counter under the preview checks all four as you type.
Yes. Press Download PNG and the preview is saved as a high-resolution image, with no watermark.
The cut is measured, not guessed: the tool lays out your text at the same text size and width as the feed and finds where the last visible line ends. Apps differ slightly between devices, font settings and app versions, so treat the cut as a close guide and leave a few words of room.
No. The preview, the character count and the PNG download all run in your browser. FeedHive never receives or stores your text, profile photo or post image.
Yes. There's no account, no signup, no watermark and no limit on how often you use it.
Beyond previews
FeedHive shows a preview for every platform while you write, then publishes to LinkedIn, Instagram, X, Threads, TikTok, Facebook and more at the best time. FeedHive AI learns your brand voice and helps you write the next post, too.
Preview and schedule in FeedHive