--- title: "Multi-Platform Post Preview, Free | OneUp Today" description: "Live previews of your post on X, LinkedIn, Reddit, Instagram, Threads, Facebook, TikTok, YouTube, and Pinterest. Image upload, link card, X tier toggle, light and dark themes. Catch truncation and hashtag styling before you publish." url: https://oneup.today/tools/post-preview --- Free Tool # Multi-Platform Post Preview Paste your post, drop in an image, and see live mockups across all 9 platforms. Catch truncation, hashtag styling, image crops, and link cards before you publish. Display name Handle Post textJust shipped a new feature. We replaced 5 spreadsheets with one tool that watches Reddit for high-intent posts. AI drafts the DM, we approve, then we send. Reply rate so far: 14% vs ~2% on cold email. Building in public. https://oneup.today 243 characters total Image (optional) X tier: Theme: Y **Your Name**@your\_handle · 2m Just shipped a new feature. We replaced 5 spreadsheets with one tool that watches Reddit for high-intent posts. AI drafts the DM, we approve, then we send. Reply rate so far: 14% vs ~2% on cold email. Building in public. https://oneup.today oneup.today oneup.today https://oneup.today 12 3 47 243 / 280X · Free Y Your Name Founder · 2m · 🌐 Just shipped a new feature. We replaced 5 spreadsheets with one tool that watches Reddit for high-intent posts. AI drafts the DM, we approve, then we send. Reply rate so far: 14% vs ~2% on cold email. Buildi... see more oneup.today oneup.today https://oneup.today 👍 Like💬 Comment↗ Repost✉ Send truncated at 210 in feed **r/SaaS**· Posted by u/your\_handle 2m ago Just shipped a new feature. Just shipped a new feature. We replaced 5 spreadsheets with one tool that watches Reddit for high-intent posts. AI drafts the DM, we approve, then we send. Reply rate so far: 14% vs ~2% on cold email. Building in public. https://oneup.today oneup.today oneup.today https://oneup.today 24 💬 8 commentsShareSave 243 / 40,000 Y your\_handle Your image 1,247 likes **your\_handle** Just shipped a new feature. We replaced 5 spreadsheets with one tool that watches Reddit for high-intent posts. AI drafts th... more truncated at 125 in feed Y your\_handle2m Just shipped a new feature. We replaced 5 spreadsheets with one tool that watches Reddit for high-intent posts. AI drafts the DM, we approve, then we send. Reply rate so far: 14% vs ~2% on cold email. Building in public. https://oneup.today oneup.today oneup.today https://oneup.today 243 / 500 Y Your Name 2m · 🌐 Just shipped a new feature. We replaced 5 spreadsheets with one tool that watches Reddit for high-intent posts. AI drafts the DM, we approve, then we send. Reply rate so far: 14% vs ~2% on cold email. Building in public. https://oneup.today oneup.today oneup.today https://oneup.today 👍 Like💬 Comment↗ Share 243 / 63,206 Y 47.2k 1.2k 832 @your\_handle Just shipped a new feature. We replaced 5 spreadsheets with one tool that watches Reddit for high-intent posts. AI drafts the DM, we approve, then we ...more truncated at ~150 in feed Your image 12:34 Y Just shipped a new feature. Your Name · 2.4k views · 2h ago Just shipped a new feature. We replaced 5 spreadsheets with one tool that watches Reddit for high-i ...show more truncated at ~100 above the fold Your image Just shipped a new feature. Just shipped a new feature. We replaced 5 spreadsheets with one tool that watches Reddit for high-intent posts. AI drafts the DM, we approve, then we send. Reply rate so far: 14% vs ~2% on cold email. Building in public. https://oneup.today Y your\_handle 243 / 500 From OneUp Today ## Write once. Native everywhere. OneUp Today formats your post for all 9 platforms automatically: character limits, hashtag rules, link previews, image dimensions, schedule, and approval flow. [See multi-platform publishing →](https://oneup.today/content) ## FAQ Are these mockups pixel-perfect? No. They are recognizable approximations meant to flag truncation, hashtag styling, image crops, and link cards before you publish. For final pixel-perfect screenshots, use the actual platform. How does the X tier toggle work? Switch between Free (280), Premium (4,000), and Premium+ (25,000) using the pills above the previews. The X card and the badge underneath update instantly. Other platforms are unaffected. Why is Instagram showing "...more" at 125 characters? Instagram displays roughly the first 125 characters of a caption in the feed before "...more". Full captions can run up to 2,200. We highlight the visible cutoff. Why does Facebook truncate so early? Facebook collapses long posts at around 500 characters in the feed and shows "...See more". The hard limit is 63,206 characters, but most readers never expand. How does the image preview crop work? The same image is rendered with each platform's native aspect ratio: 16:9 for X and YouTube, 1:1 for Instagram, 1.91:1 for LinkedIn and Facebook link cards, 4:5 for Threads, 4:3 for Reddit, 9:16 for TikTok, 2:3 for Pinterest. We use object-fit: cover, so a portrait image will be cropped on the sides for landscape platforms. Why do I see a link card on some platforms? When your text contains a URL and there is no uploaded image, X, LinkedIn, Reddit, Facebook, and Threads render a link unfurl card. Upload an image to override the card on those platforms. Does the dark theme toggle change my real post? No. It only changes how the mockups are rendered, so you can preview both light and dark modes (most apps default to a user's system theme). Is this really free? Yes. The previews are always free. The first 3 "copy formatted text" actions are free; sign up free with Google after that for unlimited copies.