Write your post below and watch a feed-style card mirror it live, counted against the 280-character limit X enforces on free accounts — the tightest cap of any major network. There’s no “… more” fold to outsmart here: a free post that fits the limit renders in full, so the card shows every word exactly as it will appear. Add an image if the post needs one; it’s displayed with a local object URL in your browser and never uploaded or stored.
The card is a deliberately generic, “inspired by” mockup — neutral glyphs, no X logo — built for the judgment calls that matter at this length: does the first line earn the read, does the post stand without its image, and does it actually fit.
0 / 280 characters
JPEG, PNG, or WebP, up to 20 MB. Displayed with a local object URL in your browser — never uploaded or stored.
Drawn with the Canvas API in your browser — a simplified card, not a real screenshot.
A generic mockup inspired by the X feed — neutral glyphs, no platform logos.
Guide
X doesn’t trim over-limit posts — it rejects them outright, which is the worst possible failure mode for a scheduled post: nothing publishes, and nobody notices until the gap in your calendar is live. The counter under the textarea reads from the same verified limits dataset as our X character counter, so the number it enforces can’t drift from the real cap.
One quirk a plain count can’t see: X wraps every link in its t.co shortener and bills it at a flat 23 characters, no matter how long the URL really is. This preview counts plain characters, so a post with a long link has more room than the counter shows — if you’re barely over and a URL is involved, you probably still fit. Emoji and most CJK characters lean the other way, counting as two.
Free X posts don’t truncate in the timeline — at 280 characters there’s nothing to collapse — which is why this preview, unlike our Instagram and Facebook ones, shows your full text with no “more” toggle. X Premium changes the math: subscribers can publish posts up to 25,000 characters (as of June 2026), and the feed shows those collapsed behind a “Show more” link after the first few lines. X doesn’t publish that cutoff as a character number, and we won’t invent one — if you write long-form on Premium, treat your opening lines as the whole post and everything below them as a click away.
Either way, the discipline is identical: the first sentence decides whether the rest gets read.
A solid pre-flight for X runs three checks: the count against 280 (or your Premium ceiling), the first line read out loud as if it were the entire post, and the post viewed without its image — the card’s optional image slot makes that last comparison a two-second toggle. The Download PNG button draws a simplified rendition of the card in your browser with the Canvas API — header, media, caption — handy for approvals, and clearly not a forged screenshot.
When the draft passes, the remaining problem is logistics. X’s limit is the shortest of the 11 networks SocialKit publishes to, so its composer shows each platform’s count side by side — the X version gets trimmed deliberately, not by an error message at posting time.
Free posts aren’t truncated — anything within the 280-character limit renders in full, so the card shows your complete text. X Premium long posts (up to 25,000 characters as of June 2026) appear collapsed behind “Show more” after the first few lines, but X publishes no exact character cutoff for that fold, so the preview doesn’t simulate one.
Every URL is wrapped in X’s t.co shortener and counts as exactly 23 characters, regardless of its real length. This preview counts plain characters, so link-heavy posts have slightly more room than the counter shows.
X rejects over-limit posts rather than trimming them — the post simply doesn’t publish. The preview flags the overage in red with the exact number of characters to cut.
No. The image renders from a local object URL directly in your browser — nothing is uploaded, stored, or tracked, and it’s discarded when you close the page.
X’s logo and icon set are trademarks, so the card uses neutral glyphs and generic “inspired by” chrome. It exists to test your name, handle, text, and length — not to fabricate an X screenshot.
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SocialKit shows each network’s character limit while you compose one post for all 11 platforms — the caption you just previewed publishes on schedule, with over-limit drafts flagged before they fail.
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