Video Sizes for Instagram Reels, YouTube Shorts, and TikTok (2026)

The standard working format for Instagram Reels, YouTube Shorts, and TikTok is a vertical 9:16 frame. A common export resolution is 1080 × 1920 pixels.

This reference covers aspect ratio, resolution, safe areas for captions and UI, and how to reframe landscape podcast or interview footage without losing the speaker.

Quick answer: which size should I use?

Platform	Working aspect ratio	Common export	Notes
Instagram Reels	9:16	1080 × 1920	Fill the phone screen; keep text in safe areas
YouTube Shorts	9:16	1080 × 1920	Same vertical master usually works
TikTok	9:16	1080 × 1920	Same master; preview UI overlays on device

Recommendation: Create one high-quality 9:16 master, then publish across platforms with light caption/copy tweaks—not three separate timeline rebuilds.

Platform maximum durations and bitrate recommendations change over time; always confirm current limits in each app’s creator docs before a major campaign.

Why 9:16 is the safest master format

A 9:16 video:

• Fills a modern phone screen in full-screen feeds
• Matches how Reels, Shorts, and TikTok present primary content
• Reduces the need to maintain separate horizontal and vertical edits for short-form

Starting from landscape and “hoping the crop works” creates more problems than exporting vertical from the start—or reframing deliberately from a wider source.

Resolution: 1080×1920 is enough for most creators

For social short-form:

• 1080 × 1920 is the practical standard for quality vs file size
• Higher resolutions can help if your source is very sharp and platforms accept them—but repeated recompression hurts more than a modest pixel bump helps
• Source quality (lighting, focus, audio) matters more than exporting at an unnecessarily high resolution

Avoid exporting, uploading, downloading, and re-uploading the same file through multiple apps. Each generation adds compression artifacts.

Safe areas: keep captions away from interface controls

Platform UI covers parts of the frame: username, description, buttons, progress bars, and ads.

Practical safe-area habits:

• Keep essential captions away from the extreme top, bottom, and right edge
• Prefer a central vertical band for primary text
• Leave faces room—do not pin large captions over eyes and mouths
• Preview on a real phone before publishing

Safe-area exact pixels differ slightly by app version and device. Device preview beats memorizing a single template.

Reframing landscape footage to 9:16

Simply cutting the center of a 16:9 podcast or webinar recording can:

• Remove the active speaker
• Split two guests awkwardly
• Leave empty desk space as the “subject”

Better approaches:

1. Face-aware reframing that follows the person talking
2. Speaker-priority crops when one guest dominates a segment
3. Punch-ins on reactions only when they serve the story

Automatic reframing is a core step in tools like Postika Reelsmith when converting long landscape sources into vertical clips via long video to shorts.

Captions and size decisions go together

Readable captions usually matter more than exporting at 4K:

• Short phrases, high contrast, selective emphasis
• Test against bright and dark scenes
• Coordinate caption style with crop so text never sits on UI or faces

Guide: Animated captions for Reels.

Export checklist for Reels, Shorts, and TikTok

• Aspect ratio is 9:16
• Resolution is at least 1080 × 1920 (or platform-accepted equivalent)
• Active speaker visible and intentional in the crop
• Captions readable on a phone; not under UI
• Audio levels comfortable on mobile speakers
• Hook appears in the first 1–3 seconds
• File not multi-generation compressed

FAQ: Short-form video sizes

Is 1080×1920 required or recommended?

It is the common professional working resolution for vertical social video. Platforms may accept other sizes, but 9:16 at 1080×1920 is the safest default for quality and compatibility.

Can I post 1:1 or 4:5 instead?

Some feeds still show non-9:16 media, but full-screen short-form surfaces are built around vertical. For Reels, Shorts, and TikTok as primary distribution, prefer 9:16.

What about 4K vertical (2160×3840)?

Use it only if your whole pipeline preserves quality and the platform benefits are real for your content. Many creators see little gain after social compression—especially if the source was 1080p.

Do YouTube Shorts need a different size than Reels?

Not for the master. Use the same 9:16 file unless you have a platform-specific packaging reason (different end screen, different first line of text).

How do I convert a horizontal podcast to vertical?

Do not rely on a blind center crop. Use face-aware or speaker-aware reframing, then verify captions and UI safe areas. Workflow context: podcast repurposing guide.

Key takeaway

For Instagram Reels, YouTube Shorts, and TikTok, ship a 9:16 / 1080×1920 master, protect caption and face safe areas, and reframe landscape sources with intention. Resolution is only one quality decision—readable captions, clean audio, a strong open, and coherent pacing usually matter more.