Supported media types
WebM is intentionally excluded — every major social platform rejects it, so accepting it would just produce platform-specific publish failures.
Upload limits
Files over 1 MB are uploaded in chunks automatically so big videos transfer reliably even on flaky connections.
Signed upload links used by AI agents (via MCP) are single-use and expire after 15 minutes by default.
Platform content types and media requirements
Each platform supports different content formats with specific media requirements — this table is the reference. There is nolinkedin_carousel, linkedin_page_carousel, or instagram_carousel content type on posts. Multi-image Instagram posts use instagram_feed. LinkedIn multi-image / PDF posts use linkedin_post / linkedin_page_post (format is inferred from the attached media; optional meta.document_title for PDFs).
LinkedIn / LinkedIn Page
X (Twitter)
Instagram (and Instagram via Facebook)
TikTok
YouTube
Threads
Bluesky
Mastodon
Telegram
Discord
Media ordering
Drag attachments in the post editor to reorder them. The order you set is the order they’ll appear on the social platform — important for carousels and multi-image posts.FAQ
What's the maximum file size?
What's the maximum file size?
10 MB per image, 1 GB per video, 100 MB per PDF.
Can I use the same media in multiple posts?
Can I use the same media in multiple posts?
Each post stores its own media records. To reuse the same image, upload it again or copy from the asset library.
What happens to media when I delete a post?
What happens to media when I delete a post?
The media records are removed along with the post.
Are images compressed or resized?
Are images compressed or resized?
Wanhap uploads media to social platforms as-is. Each platform applies its own compression and resizing rules afterwards.