Social Media Video Sizes & Specs (2026): One Video, Every Platform

Getting your social media video sizes right is the difference between a clip that fills the screen and one that ships with black bars, gets cropped mid-caption, or is quietly downranked for looking off-platform. The good news: you do not need a different export for every app. This guide lists the current aspect ratio, resolution, length, and file-size limits for every major platform, then shows the single format that works on all of them, so you can shoot once and publish everywhere. If you want the deeper production checklist, pair it with our video optimization guide; if you would rather automate delivery, the Multi Upload Tool social media API pushes one file to each platform for you.

The One Video Size That Works Everywhere

Video marketing is now near-universal: 91% of businesses use video as a marketing tool in 2026, and 82% of video marketers say it delivers a good ROI (Wyzowl). Producing a native export for every network would eat that ROI alive. Instead, master one format that every short-form feed accepts.

Social Media Video Sizes by Platform (2026)

When you do want to squeeze the most out of a specific channel, here are the current specs. Each platform lists its recommended aspect ratio, resolution, maximum length, maximum file size, and accepted formats.

TikTok Video Size

TikTok is the reference point for vertical short-form. If you nail 9:16 at 1080×1920 here, the same file is ready for the TikTok scheduler and every other short-form feed.

Instagram Reels Video Size

Keep key text and faces inside the central safe zone: Reels overlay the caption and action buttons along the bottom and right edge, and the profile-grid crop is a 1:1 square. Ready to publish? See how to schedule Instagram Reels.

YouTube Shorts Video Size

A vertical video under 3 minutes is automatically treated as a Short. Most high-performing Shorts still land in the 15–45 second range because retention beats runtime. Automate it with the YouTube Shorts scheduler.

Facebook Reels & Feed Video Size

LinkedIn Video Size

Pinterest Video Size

X (Twitter) Video Size

Bluesky Video Size

Aspect Ratios: When to Use 9:16, 1:1, and 16:9

Aspect ratio, not resolution, is what actually breaks a cross-post. Upload a 16:9 landscape clip to a 9:16 feed and the platform pillarboxes it into a tiny strip that no one watches. Here is when each ratio earns its place.

Post One Video to Every Platform

Once your master file is 9:16 at 1080×1920, the remaining work is pure delivery: uploading the same clip to each platform, one by one. That is the part worth automating. The Multi Upload Tool API takes one video URL plus a list of target platforms and publishes to each platform's official API from a single request, transcoding as needed so you never re-export per network. For high-volume workflows, the bulk upload path handles many videos at once.

// Publish one 9:16 master file to five platforms in a single request.
const response = await fetch('https://api.multi-upload-tool.com/v1/upload', {
  method: 'POST',
  headers: {
    'x-api-key': 'sk_kms_YOUR_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    platforms: ['tiktok', 'youtube_shorts', 'instagram_reels', 'facebook', 'linkedin'],
    videoUrl: 'https://assets.yoursite.com/clips/launch-1080x1920.mp4',
    title: 'Shot once, sized for everywhere 🚀',
    publishAt: '2026-09-05T18:00:00Z', // UTC ISO 8601, omit to post now
  }),
});

const result = await response.json();
for (const [platform, status] of Object.entries(result.platforms)) {
  console.log(platform, status.status); // e.g. "tiktok queued"
}

Each destination returns its own status, so one platform failing (say, an expired token) never blocks the others. Publishing to TikTok goes through TikTok's official Content Posting API, the approved method for third-party tools, so scheduling your uploads does not put the account at risk the way browser-automation or screen-recording "bots" do.

Common Video Sizing Mistakes to Avoid

1. 1.Uploading the wrong ratio. A 16:9 clip in a 9:16 feed gets pillarboxed into a strip. Export 9:16 for short-form, full stop.
2. 2.Leaving another app's watermark on. A visible TikTok logo can suppress reach on Reels and Shorts, which downrank content that looks recycled. Export a clean master and let each platform add its own branding.
3. 3.Ignoring the safe zone. Captions, profile bugs, and action buttons overlay the bottom and right edge. Keep text and faces centered so nothing important gets covered.
4. 4.Exceeding the length limit. A 90-second clip is fine on TikTok but will be rejected as a Reel if you exceed that platform's ceiling. Cut to under 60 seconds to clear every feed at once.
5. 5.Shipping the wrong codec. HEVC/H.265 support varies by platform and region. Stick to H.264 in an MP4 container for the most reliable, smallest-file uploads.