---
title: Attaching media (pictures, videos, PDFs etc.) to your social media posts.
description: Attaching media (pictures, videos, PDFs etc.) to your social media posts.
---

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# Attaching media (pictures, videos, PDFs etc.) to your social media posts.

## Here are the types and specifications of media you can post to social media with Willow

### **1. Image Uploads**

Each social media platform has its own restrictions on supported image formats and aspect ratios. Below is a breakdown of the accepted file types and dimensions:

#### **Supported Image Formats by Platform:**

•**X (Twitter):** JPG, JPEG, PNG, GIF, WEBP  
•**LinkedIn:** JPG, JPEG, PNG, GIF, WEBP  
•**Facebook:** JPG, JPEG, PNG, BMP, GIF, TIFF  
•**Instagram:** JPG, JPEG, PNG, BMP

#### **Recommended Aspect Ratios by Platform:**

•**Facebook:** 1:1, 9:16, 16:9, 4:5  
•**Instagram:** 9:16, 4:5  
•**X (Twitter):** 1:1, 9:16, 16:9  
•**LinkedIn:** 1:1, 9:16, 16:9

#### **Platform-Specific Image Restrictions:**

•**X (Twitter):** A maximum of **4 images** per post  
•**LinkedIn:** A maximum of **9 images** per post  
•**Instagram & Facebook:** No strict limit, but posts with many images may impact performance

 

### **2. Video Uploads**

Videos are a great way to increase engagement, but platforms have different rules regarding video formats, duration, and aspect ratios.

#### **Video Limitations:**

• Must be of a **mp4 H.264** format  
• A **max file size** of **500MB**  
• **X (Twitter):** Up to **140 seconds**  
• **Instagram:** Up to **90 seconds** (Reels only)

#### **Aspect Ratio & Resolution Considerations:**

•**Instagram videos should be at least 1080x1920 pixels.** Lower resolutions may result in reduced quality.  
•**Instagram videos** must have an aspect ratio of either **9:16 or 4:5.**  
•**X (Twitter), LinkedIn, and Facebook** support videos in **1:1, 9:16, and 16:9 aspect ratios.**  
•Any aspect ratio outside the acceptable range may cause improper formatting or rejection of the post.

#### **Platform-Specific Video Restrictions:**

•**Instagram:** Videos must be uploaded as Reels and must follow **the correct aspect ratio guidelines** (9:16 or 4:5).  
•**Facebook & LinkedIn:** Videos with unusual aspect ratios may lead to formatting issues, and Willow will notify you if an adjustment is needed.

 

### **3. PDF Uploads (LinkedIn Only)**

PDF attachments are currently **only supported for LinkedIn posts**.

•PDFs must be **under 100MB** in size.  
•PDFs can have a **maximum of 300 pages**.  
•If you select a non-LinkedIn platform while attaching a PDF, Willow will prompt you to remove the unsupported platforms.

 

#### **Automatic Validation & Warnings in Willow**

Willow automatically checks your media files and alerts you if:

✔ The file format is not supported.  
✔ The aspect ratio is incorrect.  
✔ The video duration exceeds platform limits.  
✔ Too many images are attached for a specific platform.  
✔ PDFs are uploaded for non-LinkedIn posts.

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