See exactly how your X post renders in the timeline — character count, line breaks, link cards, and thread layout — before you hit Post.
Free plan included · No credit card · Pixel-true X preview
Real 280-character limit with live character count.
Pixel-true timeline preview with avatar, handle, and metadata.
Link card unfurling so you catch broken previews before publishing.
Thread preview — spot awkward breaks before you ship the sequence.
AI rewrites tuned for X's punchy, hook-first voice.
Preview the same draft on Instagram, Facebook, LinkedIn, Threads, TikTok, Pinterest, and YouTube Shorts.
X caption limit: 280 characters (standard) · Feed preview truncates exactly at 280 characters. SherpaPost shows the exact cutoff and line breaks before you publish.
A tweet preview is a faithful mockup of how a post will render on X (formerly Twitter) before you publish — avatar, handle, body text wrapped at the right width, link card unfurling, and the hard 280-character cap. SherpaPost shows the live cursor count, where threads break, and how attached media crops, so you stop discovering broken line wraps the moment after you hit Post.
Standard X accounts are capped at 280 characters per post. Premium subscribers can publish long-form posts up to 25,000 characters, but the feed still truncates after the first ~280 with a 'Show more' link — so the hook still has to land in the first tweet-length window. SherpaPost previews both the timeline view and the expanded view.
Yes. Paste your full draft and SherpaPost will split it on natural breaks at 280 characters, showing each tweet as it will appear in the thread with numbering and continuation. You then copy each segment into X manually — no API access, no risk of failed publishes or account flags.
Free to start. No scheduler, no API risk — you stay in control.
Start free