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Last updated: 2026/9/30

Content you can post

Supported Social Platforms
X (Twitter)InstagramThreadsFacebookTikTok
Supported Plans
FreePersonalProfessionalBusinessEnterprise

We explain the types of content that can be posted on each social media platform, as well as image and video file formats and size restrictions.

Errors may occur if formats other than these are used. Even if you create images or videos in the specified formats and sizes, the social media platform may convert or compress the format, potentially reducing image quality.

All Social Media​

Text​

  • Emojis can be used.

X (Twitter)​

Text​

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

Images​

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

Animated GIF​

  • Format: GIF
  • Size: Up to 15MB
  • Resolution: 1280x1080 or less
  • Count of frames: 350 or less
  • Pixel count (product of height, width, and number of 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 140 seconds
  • Aspect Ratio: 1:3 to 3:1
  • Pixel Aspect Ratio is 1:1
  • Only supports YUV 4:2:0 pixel format
  • Audio
  • Do not include Open GOP
  • Always use Progressive Scan

Threads (Tree format)​

Polls (Surveys)​

Polling duration can also be set.

Accounts that can Reply​

The following can be set:

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

Daily Post Limit​

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

Unsupported Content​

  • Bold/italic text
  • Edit after posting

Instagram​

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

Feed/Reels​

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

Text​

  • Up to 2,200 characters
    • For Reels: Up to 733 characters for Japanese

Images​

  • Formats: JPEG, PNG, WebP, BMP
    • If an image in a format other than JPEG is uploaded, it will be converted to JPEG format.
  • Size: Up to 8MB
    • Images exceeding this size cannot be uploaded.
    • Images posted to Instagram will not be compressed by SocialDog.
  • Aspect Ratio: Within the range of 4:5 to 1.91:1
  • Up to 10 images

Videos​

  • Formats: 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​

  • Formats: JPEG, PNG
    • If an image in a format other than JPEG is uploaded, it will be converted to JPEG format.
  • Size: Up to 8MB
    • Images exceeding this size cannot be uploaded.
    • Images posted to Instagram will not be compressed by SocialDog.
  • 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​

  • Formats: 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/Reels
    • Add text
    • Add stickers (Polls, Questions, Emojis, Links, Hashtags, Mentions, Location)

Daily Post Limit​

100 posts

Facebook​

Text​

  • Up to 60,000 characters

Images​

  • Formats: JPEG, PNG, WebP, BMP, TIFF
    • WebP images will be converted to JPEG format.
    • If a BMP image larger than 4MB is uploaded, it will be converted to JPEG format when compressed on SocialDog.
  • Size: Up to 4MB (1MB for PNG)
    • If your 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
  • Formats: MP4, MOV, GIF
  • Aspect Ratio: Within the range of 9:16 to 16:9

Threads​

Text​

  • Up to 500 characters can be posted.

Images​

  • Formats: JPEG, PNG
  • Size: Up to 8MB (per image)
  • Number of images that can be attached per post: Up to 20
  • Aspect Ratio: Within the range of 0.01:1 to 10:1
  • Color Space: sRGB (If other color spaces are used in the image, they will be converted to sRGB)

Videos​

  • Formats: 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 posts

TikTok​

Text​

  • Up to 2,200 characters can be posted along with a video.

Videos​

  • Formats: 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 posts

Unsupported Content​

  • Image posts
  • Stories posts