Attaching Images, Videos and Media to Posts
Learn how to attach images, videos, GIFs, and other media to your social media posts in Publlish. Covers supported formats, upload methods, and tips for each platform.
Adding media to your posts — whether it's a single product photo, a carousel of images, or a short-form video — is one of the core actions in Publlish. This guide covers how to attach media, what formats are supported across each platform, and what to watch out for before you schedule.
How to Attach Media to a Post
- Click New Post in your Publlish dashboard
- Select your channel(s)
- In the composer, click the media attachment icon (paperclip, image, or camera icon depending on your interface)
- Choose your upload method: - Upload from your device — browse and select files from your computer - Drag and drop — drag files directly into the composer window - Cloud storage — attach from Google Drive, Dropbox, or OneDrive if connected
- Your file will upload and appear as a preview in the composer
- Add your caption and schedule
For platforms that support multiple images (Instagram carousels, Facebook multi-image posts), you can attach multiple files in one go by selecting them all at once.
Supported Media Types
Images
- Formats: JPG, PNG, GIF (static — animated GIFs are treated differently per platform)
- Recommended format: JPG for photos, PNG for graphics with transparency or text
- Upload images in the highest quality you have — Publlish and the platforms will compress them for delivery
Videos
- Formats: MP4 strongly recommended across all platforms; MOV also widely supported
- Codec: H.264 video, AAC audio
- Upload the original high-quality file — avoid re-compressing an already-compressed video, as this degrades quality
GIFs
- Animated GIFs are supported on X (Twitter) — upload directly
- On Instagram and TikTok, GIFs are treated as static images — only the first frame shows
- On LinkedIn, GIFs display as animated
- On Facebook, GIF support varies — animated display is not guaranteed
Documents (LinkedIn only)
- PDF format for LinkedIn document carousels
- Up to 300 pages, maximum 100MB
Platform Media Limits at a Glance
| Platform | Max images per post | Max video size | Max video length |
|---|---|---|---|
| TikTok | 1 | 1GB | 10 min |
| 10 | 10GB | 240 min | |
| Instagram (feed) | 10 (carousel) | 1GB | 60 min |
| Instagram Reels | 1 | 1GB | 90 sec |
| YouTube Shorts | 1 | 256GB | 60 sec (Shorts) |
| X (Twitter) | 4 | 512MB | 2 min 20 sec |
| 20 | 5GB | 10 min |
Multi-Image Posts and Carousels
For platforms that support multiple images in one post, select all the images you want to include before scheduling:
- Instagram carousels — up to 10 images or videos. All slides must use the same aspect ratio. Great for step-by-step content, before/after, or product galleries.
- Facebook multi-image — up to 10 images in a single post. Facebook displays them as a scrollable gallery.
- LinkedIn multi-image — up to 20 images. Displays as a scrollable gallery in the feed.
- X (Twitter) — up to 4 images per tweet, displayed as a 2x2 grid.
Attaching Media from Cloud Storage
If you store your assets in Google Drive, Dropbox, or OneDrive, you can attach files directly from those services without downloading to your device first.
Attaching media from cloud storage →
Before You Upload — Quick Checklist
- [ ] File is in a supported format (JPG/PNG for images, MP4 for video)
- [ ] Image is within the platform's accepted aspect ratio
- [ ] Video meets the platform's duration and file size limits
- [ ] For Instagram: aspect ratio is between 4:5 and 1.91:1
- [ ] For YouTube Shorts: video is 9:16 and under 60 seconds
- [ ] No TikTok watermark on videos being uploaded to Instagram
Instagram aspect ratio guide → Ideal image sizes and formats →
Frequently Asked Questions
What image formats does Publlish support? JPG and PNG are supported across all platforms. GIF support varies by platform. Use JPG for photos and PNG for graphics with transparent backgrounds.
Can I upload the same image to multiple platforms at once? Yes — select multiple channels when composing and attach your media once. Publlish will use the same media file for all selected channels.
What video format should I use for best results? MP4 with H.264 video codec and AAC audio. This is universally supported across all platforms Publlish connects to.
Can I attach media from Google Drive? Yes — if your Google Drive is connected. Cloud storage guide →
My media upload is failing — what do I do? Check the file format, size, and aspect ratio against the platform's requirements. Video troubleshooting →