YouTube post previewer
A YouTube post previewer shows the two things a viewer sees before they watch anything: the thumbnail with your title beside it, and the Short with YouTube’s interface over the top. Both truncate, and both decide whether the video gets opened at all.
0 characters
Select accounts to see live preview
You do not choose whether it is a Short
YouTube classifies an upload as a Short when it is vertical and under three minutes. There is no switch for it. That means the same file can end up in a feed you did not design for, which is worth seeing before you upload rather than after.
The three minute figure is current, by the way. Shorts used to be capped at 60 seconds and a lot of advice still says so. Shorts also top out at 1080p, so a 4K master gains you nothing there.
Titles, descriptions and the blurred bars
A title takes 100 characters and the search result shows fewer than that, so the words that matter belong at the front. The description holds 5,000 characters and only the first two lines appear before "more". Tags share a 500 character budget between them.
The detail most people get wrong: a horizontal video in the Shorts feed is not letterboxed with black bars. YouTube fills the top and bottom with a blurred copy of your own frame. It looks softer and cheaper than black bars would, and it is another reason to shoot vertical for Shorts rather than cropping later.
Before you publish
- Put the searchable words in the first half of the title. The rest is often cut in a result list.
- Write the first two lines of the description as if they were the whole thing. That is what shows before "more".
- Upload vertical for Shorts. A horizontal file gets blurred bands top and bottom, not clean black ones.
- Keep text out of the bottom right of a thumbnail. The duration badge sits there.
Preview a post for another platform
X (Twitter) post previewerAn X post previewer shows the tweet as a timeline renders it: your text at the real width, the photo grid X builds from your images, and the engagement row underneath.Open it
Instagram post previewerAn Instagram post previewer shows you the post Instagram will actually render, not the one you typed.Open it
Facebook post previewerA Facebook post previewer renders your post the way a Page timeline will: your text above the media, the album grid Facebook builds from however many photos you attached, and the Reel or Story canvas with Facebook’s own overlays on top..Open it
LinkedIn post previewerA LinkedIn post previewer renders your post as a feed will: your text with the "see more" fold in it, your image inside LinkedIn’s own canvas, and the reaction and comment row underneath.Open it
TikTok post previewerA TikTok post previewer puts your video or your photos behind the real TikTok interface: the caption at the bottom left, the action rail down the right, the sound ticker, and the dots if you are posting a photo carousel.Open it
Threads post previewerA Threads post previewer renders your post the way the Threads app does: the username line, your text, the media carousel, and the like and reply row underneath.Open it
Bluesky post previewerA Bluesky post previewer draws your post as the app does: the display name and the domain handle, your text, the image grid, and the reply, repost and like row.Open itYouTube Shorts safe zone checkerThe YouTube Shorts safe zone is the part of a 1080x1920 frame that the Shorts player does not cover with the title, the channel row, the action buttons and the progress bar.Open itSocial media safe zone checkerA safe zone is the part of a full screen vertical post that the app’s own interface does not cover.Open itOr preview every platform at once with the full post previewer.
This tool is free, forever. No accounts, no paywalls, no catch.
I build these solo. If you want to support my work, donating a coffee would be highly appreciated! ☕
Frequently Asked Questions
Everything you need to know about YouTube post previewer from PublishQ
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— me 👋
Hi, I'm Alexandro 👋
I left my Software Engineer role at Amazon to build tools that solve real problems — the kind big companies ignore because they read spreadsheets instead of using their own products.
I was spending over an hour daily just scheduling 2 shorts across 3 platforms — logging in, reformatting, uploading one by one. That felt broken. So I built PublishQ . Now I create 4 shorts in 3 minutes and schedule them to 4 platforms in under 30 seconds.
PublishQ is bootstrapped. No investors, no vanity metrics. I build what actually helps you — because I use it every day myself.
Thank you,
Alexandro
Preview done. Now publish smarter.
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