Photo Posts

Visual content that drives engagement across social networks. Use photo posts to share high-quality images—single or multiple—while respecting each platform’s unique requirements.

Key Features

• Multi-Platform Publishing Post images simultaneously to all supported networks.

• Multiple Image Support Single photos or carousels (up to platform limits).

• Advanced Customization Captions and location tags where available.

• Resolution Optimization Automatic resizing and format handling per network.

Platform Support & Limits

Platform	Max Photos	Photo Size Limit	Caption Support	Notes
Facebook	Unlimited	No restriction	Yes	No restrictions on photo size.
Instagram	10	8 MB	Yes	Minimum resolution: 320x320 px, automatically cropped.
TikTok	35	No restriction	Yes	Cannot mix photos with GIFs or videos.
Threads	20	8 MB	Yes	Cannot mix photos with GIFs or videos.
Twitter	4	5 MB	Yes	Supports only up to 4 photos per post.
LinkedIn	20	No restriction	Yes	Photos and GIFs are supported, cannot mix with videos.
Telegram	10	10 MB	Yes	Cannot mix photos with GIFs or videos.
Mastodon	4	8 MB	Yes	Supports JPEG, PNG, or WEBP formats.

Note: Inserting Alt text is supported on Publer for all social networks. However, when creating multi-photo posts on Facebook, adding Alt text will also count as the photo caption.

Note: You cannot add Alt text to Facebook Personal Profiles/Groups posts, due to API limitations from the networks.

Request Structure

Below is an example showing a photo post scheduled for multiple platforms.

Omit scheduled_at for immediate posts.

{
  "bulk": {
    "state": "scheduled",
    "posts": [
      {
        "networks": {
          "facebook": {
            "type": "photo",
            "text": "Our new office is complete! #OfficeLife",
            "media": [
              {
                "id": "asset123456",
                "type": "photo",
                "caption": "Modern office with open layout"
              },
              {
                "id": "asset123457",
                "type": "photo",
                "caption": "Collaborative meeting area"
              }
            ]
          },
          "instagram": {
            "type": "photo",
            "text": "We’ve moved into our new HQ! 🏢✨",
            "media": [
              { "id": "asset123456", "type": "photo", "caption": "Modern office space" },
              { "id": "asset123457", "type": "photo", "caption": "Meeting area" }
            ]
          }
        },
        "accounts": [
          { "id": "FB_ACCOUNT_ID", "scheduled_at": "2025-05-20T14:30:00Z" },
          { "id": "IG_ACCOUNT_ID", "scheduled_at": "2025-05-20T15:00:00Z" }
        ]
      }
    ]
  }
}

Required Parameters

Field	Description
networks.{provider}.type	Must be "photo".
networks.{provider}.media	Array of { id, type, caption } objects.
accounts[].id	Target social account ID.
accounts[].scheduled_at*	ISO 8601 timestamp for scheduling (optional).

* Omit scheduled_at when publishing immediately.

Media Workflow

1. Upload Images: Use the Media Handling API to upload files.

2. Receive IDs: Note each media object’s id.

3. Compose Post: Reference those IDs in your media array.

4. Publish/Schedule: Send the payload to the posts endpoint.

Best Practices

• Optimize Quality: Compress and resize images to platform specs.

• Descriptive Alt Text: Enhance accessibility and SEO.

• Tailor Captions: Adjust tone and length per network.

• Experiment Carousels: Test image order to boost engagement.

• Consistent Branding: Use uniform styles and watermarks.

Related Topics

• Media Handling

• Content Types

• Publishing Methods