Supported PlatformsWrite once. Adapt captions. Publish everywhere.
Connect, compose, adapt, and schedule content across 8 major social networks through official, compliant APIs. Never share passwords or rely on manual device notifications.
Official IntegrationsDirect platform connections with granular permission scopes.
Select any platform to inspect media limits, video specifications, character rules, and scheduling options.
Direct desktop publishing to Instagram Professional & Creator accounts via Meta Graph API.
Facebook Pages
Automate text updates, high-res photos, and video posts to all Facebook Pages you manage.
Threads
Be consistent on Meta's fast-growing text and conversation network via the official Threads API.
Reach authentic communities on Reddit with custom titles, subreddit targeting, and permanent OAuth.
X (Twitter)
Publish updates, announcements, and high-res photos to X with live 280-character tracking.
Build professional authority with long-form storytelling, native video, and visual carousels.
YouTube & Shorts
Resumable chunked video uploads, auto-Shorts detection, tags, and multi-channel publishing.
TikTok
Upload vertical video and photo carousels to TikTok with official Content Posting API compliance.
Media Specifications & LimitsEnforced in the composer to guarantee successful delivery without API rejects.
Every network enforces unique constraints for media formats, aspect ratios, and caption lengths.
| Platform | Caption Limit | Max Video | Supported Media | Auth Method |
|---|---|---|---|---|
| 2,200 chars | 1 GB (up to 15 minutes for Reels) | Single Images (JPEG, PNG, WebP), Reels & Videos (MP4, MOV), Feed Carousel Images | Official Meta OAuth 2.0 with automatic token renewal. | |
| Facebook Pages | 63,206 chars | 4 GB (MP4, MOV, WebM) | Single Photos & High-Res Images, Native Video (up to 4 GB), Text-only status updates | Meta OAuth 2.0 with automatic 60-day long-lived token exchange. |
| Threads | 500 chars | 1 GB (up to 5 minutes) | Single Images (JPEG, PNG), Video (up to 1 GB), Text-only posts | Official Meta Threads OAuth 2.0 with token auto-refresh. |
| 40,000 chars | Not directly posted via API; text, link, and images supported. | Self-Text Discussions (Markdown), Direct Image Posts, Link Posts with URLs | Reddit OAuth 2.0 with permanent refresh tokens. | |
| X (Twitter) | 280 chars | Video sent to other destinations; X receives text and images in current integration. | High-Res Images (JPEG, PNG, WebP, GIF), Text-only Tweets, Web Links | Official OAuth 2.0 with PKCE and user-scoped write permissions. |
| 3,000 chars | 512 MB (MP4, WebM) | Single Photos & Infographics, Native Video (up to 512 MB), Text-only Posts, Link Previews | Official LinkedIn OAuth 2.0 with OpenID Connect. | |
| YouTube & Shorts | 5,000 chars | 256 GB via direct chunked resumable upload | YouTube Shorts (Vertical <60s), Long-form Video (up to 256 GB), Custom Video Thumbnails | Google OAuth 2.0 with youtube.upload and youtube.readonly scopes. |
| TikTok | 2,200 chars | 4 GB (MP4, MOV, WebM) | Vertical Video (9:16), Photo Carousels (up to 35 images), Landscape Video (16:9) | TikTok Login Kit with video.publish and video.upload permissions. |
Why PostMeshEngineered for speed, clarity, and publication reliability.
Built specifically for creators, agencies, and businesses that need reliable multi-platform distribution.
Compose Once, Tailor Each
Draft your master post once, then customize hashtags, handle mentions, and media attachments for each network without starting over.
Official API Verification
No mobile app pass-through or manual copy-pasting. Content posts directly to your feeds through official OAuth connections.
Transparent History & Retries
Every publishing request logs exact delivery status, timestamp, live URL, and readable error reasons with one-click retries.