Media Limits & Requirements

Last updated: June 3, 2026

To prevent failed posts and ensure optimal visual quality on native feeds, Rella automatically validates your uploaded photos, videos, and documents against each social media platform's strict technical guidelines.

This page serves as the source of truth for Rella's supported media file formats, size limits, and aspect ratios.

Supported Image Formats & Limits

Different platforms accept different file extensions. Rella automatically converts uploaded image formats (such as converting transparent .png files to .jpeg) during publishing to ensure compatibility [20].

Platform	Accepted Extensions	Max File Size	Target Output Format [20]
Instagram	`.jpeg`, `.jpg` [20]	8MB [15]	`.jpeg` [20]
TikTok	`.jpeg`, `.jpg`, `.webp` [20]	20MB [20]	`.jpeg` [20]
YouTube	`.jpeg`, `.jpg`, `.png` [15]	10MB [15]	`.jpeg` [20]
Facebook	`.jpeg`, `.jpg`, `.png`, `.gif`, `.bmp`, `.tiff` [20]	10MB [15]	`.png` or `.jpeg` [20]
LinkedIn	`.jpeg`, `.jpg`, `.png`, `.gif` [20]	8MB [20]	`.png` or `.jpeg` [20]
Pinterest	`.jpeg`, `.jpg`, `.png` [20]	20MB [15]	`.png` or `.jpeg` [20]
X (Twitter)	`.jpeg`, `.jpg`, `.png`, `.webp`, `.gif` [20]	5MB [20]	`.png` or `.jpeg` [20]
Threads	`.jpeg`, `.jpg`, `.png` [20]	8MB [15]	`.png` or `.jpeg` [20]
Google Business	`.jpeg`, `.jpg`, `.png` [20]	10MB [15]	`.png` or `.jpeg` [20]

Detailed Platform Video & Media Specs

Instagram Reels & Stories

Aspect Ratios:
- Reels: Recommended vertical 9:16 (supported range: 0.01 to 10) [15].
- Stories: Recommended 9:16 (supported range: 0.1 to 10) [15].
- Posts: Uniform aspect ratio is required across all carousel slides (supported range: 0.75 to 1.91) [15].
Duration limits:
- Reels: 3 to 900 seconds (15 minutes) [15].
- Stories / Posts: 3 to 60 seconds [15].
Technical Video Specifications:
- Max Video File Size: 300MB (for Reels) [15] or 100MB (for Stories) [15].
- Supported Video Codecs: H.264, HEVC, VP8, VP9 [15].
- Required Audio Codec: AAC [15].
- Max Audio Bitrate: 128 Kbps [15].
- Max Audio Sample Rate: 48,000 Hz [15].

TikTok Videos

Aspect Ratio: Recommended vertical 9:16 (supported range: 0.01 to 10).
Duration Limits: 1 to 600 seconds (10 minutes).
Technical Video Specifications:
- Max Video File Size: 4 GB.
- Supported Video Formats: .mp4, .webm, .mov.
- Dimensions: Width/height must be between 360px and 4096px.
- Frame Rate: 23 to 60 FPS.

YouTube Videos & Shorts

Aspect Ratios:
- Shorts: Recommended vertical 9:16 (supported range: 0.5 to 1.0).
- Videos: Horizontal 16:9 is standard.
Duration limits:
- Shorts: 2 to 180 seconds (3 minutes).
- Videos: 1 second to 12 hours (43,200 seconds).
Technical Video Specifications:
- Max Video File Size: 256 GB.
- Important: Title, caption, or hashtags cannot contain the characters < or > due to YouTube API restrictions.

LinkedIn Videos & Documents

Aspect Ratio: Supported range: 0.01 to 10.
Duration Limits: 3 to 1,800 seconds (30 minutes).
Technical Video Specifications:
- Max Video File Size: 500MB (Min: 75KB).
- Max Video Width: 1920px.
Document Auto-Publishing Specs:
- Rella supports auto-posting a single PDF document directly to LinkedIn.
- Max Document File Size: 100MB.

Pinterest Videos

Aspect Ratio: Supported range: 0.5 to 1.91 (vertical to horizontal).
Duration Limits: 4 to 900 seconds (15 minutes).
Technical Video Specifications:
- Max Video File Size: 2 GB.
- Max Video Width: 1920px.

X (formerly Twitter) Videos

Aspect Ratio: Supported range: 0.33 to 3.
Duration Limits: 0.5 to 140 seconds (2 minutes and 20 seconds).
Technical Video Specifications:
- Max Video File Size: 512MB.
- Dimensions: Between 32x32px and 1280x1024px.
- Frame Rate: 23 to 60 FPS.

Threads Videos

Aspect Ratio: Supported range: 0.01 to 10.
Duration Limits: 1 to 300 seconds (5 minutes).
Technical Video Specifications:
- Max Video File Size: 1GB.
- Max Video Width: 1920px.

Google Business Profile Photos

Media Limit: Maximum of 1 photo.
Overage warning: Google Business Profile does not support video auto-publishing in Rella at this time. Multi-photo posts are also blocked.