> For the complete documentation index, see [llms.txt](https://help.blotato.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.blotato.com/tips-and-tricks/social-platform-requirements.md).

# Social Platform Requirements

Use [Media Requirements](/rest-api-reference/publish-post/media.md) as the source of truth for supported formats, dimensions, durations, file sizes, and media counts.

## Upload and Conversion Checklist

1. Check your plan limit. Starter supports files up to 400 MB. Creator and Agency support files up to 1 GB.
2. Check the target platform's limit in [Media Requirements](/rest-api-reference/publish-post/media.md). The smaller file-size limit applies.
3. Use MP4 with H.264 video and AAC audio when possible.
4. Make every media URL publicly accessible without a login, cookie, or expiring preview page.
5. For videos longer than 120 seconds, prepare the file to match the platform requirements before uploading. Blotato does not run automatic video conversion on files longer than 120 seconds.
6. If conversion is required, Blotato may change the container, crop, dimensions, bitrate, or image format before publishing.

## Twitter

See [Twitter media requirements](/rest-api-reference/publish-post/media.md#twitter).

## Instagram

See [Instagram media requirements](/rest-api-reference/publish-post/media.md#instagram).

Instagram carousels support up to 10 images or videos.

## LinkedIn

See [LinkedIn media requirements](/rest-api-reference/publish-post/media.md#linkedin).

LinkedIn converts non-MP4 videos to MP4. Videos longer than 120 seconds must already meet LinkedIn's publishing requirements.

## Facebook

See [Facebook media requirements](/rest-api-reference/publish-post/media.md#facebook).

Facebook Reels support videos from 3 seconds to 4 hours. Facebook Stories support videos from 3 to 60 seconds.

## TikTok

See [TikTok media requirements](/rest-api-reference/publish-post/media.md#tiktok).

Use JPEG or WebP for image posts. JPEG avoids differences between the web upload validator and API conversion path.

## Pinterest

See [Pinterest media requirements](/rest-api-reference/publish-post/media.md#pinterest).

## Threads

See [Threads media requirements](/rest-api-reference/publish-post/media.md#threads).

Each Threads post supports 1 image or video. Use `additionalPosts` to publish multiple media items as a thread.

## Bluesky

See [Bluesky media requirements](/rest-api-reference/publish-post/media.md#bluesky).

Each Bluesky post supports up to 4 images or 1 video.

## YouTube

See [YouTube media requirements](/rest-api-reference/publish-post/media.md#youtube).

Blotato uses the standard YouTube upload flow. YouTube decides whether an eligible video appears as a Short.


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