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Last updated: 2026/11/5

Content you can post

Supported Social Platforms
X (Twitter)InstagramThreadsFacebookTikTok
Supported Plans
FreePersonalProfessionalBusinessEnterprise

This section explains the types of content that can be posted on each social media platform, as well as the file formats and size limitations for images and videos.

Using formats other than these may result in errors. Even if images and videos are created in the specified formats and sizes, social media platforms may convert or compress them, potentially reducing quality.

All Social Media Platforms​

Text​

  • Emojis can be used.

X (Twitter)​

Text​

  • Posts up to 140 characters
  • Long posts over 140 characters
    • Japanese: Up to 12,500 characters
    • English: Up to 25,000 characters
    • Only for users subscribed to X Premium (Twitter Blue)

Images​

  • Format: JPG, PNG, GIF, WebP, BMP
    • If WebP images larger than 5MB are uploaded, they will be converted to JPEG format when compressed by SocialDog.
    • BMP images will be converted to JPEG format.
  • Size: Up to 5MB (per image)
    • If the browser supports image compression, images larger than this size will be automatically compressed to a postable size.
  • Up to 4 images

Animated GIFs​

  • Format: GIF
  • Size: Up to 15MB
  • Resolution: 1280x1080 or less
  • Frames: 350 or less
  • Pixel count (product of height, width, and frames): Up to 300 million

Videos​

  • Size: Up to 512MB

The recommended video formats announced by X (Twitter) are as follows:

Recommendations​

  • Recommended video codec: H264 high profile
  • Recommended frame rate: 30FPS, 60FPS
  • Recommended video resolution: 1280x720 (landscape), 720x1280 (portrait), 720x720 (square)
  • Recommended minimum video bitrate: 5,000kbps
  • Recommended minimum audio bitrate: 128kbps
  • Recommended audio codec: AAC LC
  • Recommended aspect ratio: 16:9 (landscape or portrait), 1:1 (square)

Advanced Processing​

  • Frame rate: 60FPS or less
  • Size: 32x32 to 1280x1024
  • File size: 512MB or less
  • Playback time: 0.5 seconds to 20 minutes
  • Aspect ratio: 1:3 to 3:1
  • Pixel aspect ratio is 1:1
  • Supports YUV 4:2:0 pixel format only
  • Audio
  • Do not include Open GOP
  • Always use progressive scan

Threads (Tree format)​

Polls​

You can also set the poll duration.

Accounts that can Reply​

The following can be set:

  • Everyone
  • Following Accounts
  • Verified Accounts
  • Accounts you @-mentioned

Daily Post Limit​

  • Verified Accounts (X Premium subscribers): 2,400
  • Unverified Accounts: Regular Posts 50 / Replies 200

Unsupported Content​

  • Bold and italic text
  • Post-publication Edit

Instagram​

On Instagram, the formats for images and videos that can be posted differ between Feed/Reel Posts and Stories Posts.

Feed and Reels​

If one video is attached, it will be posted as a Reel Post.

Text​

  • Up to 2,200 characters
    • For Reels: Up to 733 characters for Japanese
    • Due to Instagram's specifications, if a URL is included in the Post body (caption), it will not become a link and will be displayed as plain text.

Images​

  • Format: JPEG, PNG, WebP, BMP
    • If images other than JPEG format are uploaded, they will be converted to JPEG format.
  • Size: Up to 8MB
    • Images exceeding this size cannot be uploaded.
    • SocialDog does not compress images posted to Instagram.
  • Aspect ratio: 3:4 to 1.91:1
  • Up to 10 images

Videos​

  • Format: MP4, MOV, QuickTime
  • Size: Up to 300MB
  • Video length:
    • Feed: 3 to 90 seconds
    • Reels: 3 seconds to 15 minutes
  • Aspect ratio: 4:5 to 16:9
  • Audio: 1 or 2 channels (mono or stereo)

Stories​

Mentions​

Images​

  • Format: JPEG, PNG
    • If images other than JPEG format are uploaded, they will be converted to JPEG format.
  • Size: Up to 8MB
    • Images exceeding this size cannot be uploaded.
    • SocialDog does not compress images posted to Instagram.
  • Aspect ratio: 9:16 (recommended)
    • If Media with an aspect ratio different from the recommended 9:16 is posted, margins may be added or parts may be cropped on Instagram.

Videos​

  • Format: MP4, MOV
  • Size: Up to 100MB
  • Video length: 3 to 60 seconds
  • Aspect ratio: 9:16 (recommended)
    • If Media with an aspect ratio different from the recommended 9:16 is posted, margins may be added or parts may be cropped on Instagram.
  • Audio: AAC, up to 2 channels

Unsupported Content​

  • Stories and Reels
    • Add Text
    • Add Stickers (Polls, Questions, Emojis, Links, Hashtags, Mentions, Location)

Daily Post Limit​

100

Facebook​

Text​

  • Up to 60,000 characters

Images​

  • Format: JPEG, PNG, WebP, BMP, TIFF
    • WebP images will be converted to JPEG format.
    • If BMP images larger than 4MB are uploaded, they will be converted to JPEG format when compressed by SocialDog.
  • Size: Up to 4MB (up to 1MB for PNG)
    • If the browser supports image compression, images larger than this size will be automatically compressed to a postable size. However, TIFF images cannot be compressed.
  • Up to 10 images

Videos​

  • Size: Up to 100MB
  • Format: MP4, MOV, GIF
  • Aspect ratio: 9:16 to 16:9

Threads​

Text​

  • Posts of up to 500 characters are possible.

Images​

  • Format: JPEG, PNG
  • Size: Up to 8MB (per image)
  • Number of images that can be attached per Post: Up to 20
  • Aspect ratio: 0.01:1 to 10:1
  • Color space: sRGB (If other color spaces are used for images, they will be converted to sRGB)

Videos​

  • Format: MOV or MP4
  • Size: Up to 1GB
  • Length: Up to 300 seconds
  • Audio: AAC, maximum sample rate 48 kHz, 1 or 2 channels (mono or stereo)
  • Video codec: HEVC or H264

Daily Post Limit​

250

TikTok​

Text​

  • Posts of up to 2,200 characters can be made along with videos.

Videos​

  • Format: MP4 (recommended), MOV, WebM
  • Size: Up to 4GB
  • Length: 1 second to 15 minutes
  • Audio codec: AAC
  • Video codec: H.264 (recommended), H.265, VP8, VP9

Daily Post Limit​

  • 15

Unsupported Content​

  • Image Posts
  • Stories Posts