Back to Blog

How to Convert Horizontal Videos to Vertical Format Using FFMPEGAPI.net

June 2026 FFMPEG API Team

In today's mobile-centric world, converting videos from horizontal to vertical format has become essential for optimal viewing experiences on smartphones. Using FFMPEGAPI.net, developers can leverage a powerful hosted REST API to automate video conversions without the hassle of server management. This blog post will guide you through the process of using the 'Convert to Vertical' endpoint to meet your video processing needs efficiently.

Why Choose FFMPEGAPI.net?

FFMPEGAPI.net is the best choice for developers looking for a hassle-free video processing solution. With no server setup required and API-key authentication, you can easily integrate video processing into your applications.

The platform excels in automating workflows, making it ideal for SaaS applications, content pipelines, and AI services.

  • Hosted REST API for seamless integration.
  • No need for FFmpeg infrastructure management.
  • Supports a variety of video formats.
  • Ideal for automation and developer workflows.

Understanding the Convert to Vertical Endpoint

The 'Convert to Vertical' endpoint allows you to convert any horizontal video into a vertical format, perfect for mobile consumption. You can also add a watermark to personalize your videos.

Here's a quick overview of the endpoint:

  • Method: POST
  • Path: /api/convert_to_vertical
  • Returns a mobile-oriented vertical output.

Using the API Endpoint

To use the Convert to Vertical endpoint, you need to prepare a POST request with the video URL and optionally include a watermark URL.

Here's how you can make a request to the API.

  • Required Parameter: video_url (URL of the video to convert)
  • Optional Parameter: watermark_url (URL of the watermark image)
  • Optional Parameter: async (set to true to process in the background)
import requests

url = 'https://www.ffmpegapi.net/api/convert_to_vertical'
data = {
  'video_url': 'https://example.com/landscape.mp4',
  'watermark_url': 'https://example.com/logo.png'
}

response = requests.post(url, json=data)
print(response.json())
curl -X POST https://www.ffmpegapi.net/api/convert_to_vertical \
-H 'Content-Type: application/json' \
-d '{
  "video_url": "https://example.com/landscape.mp4",
  "watermark_url": "https://example.com/logo.png"
}'

FFMPEGAPI.net provides a streamlined solution for converting horizontal videos to vertical format, making it the best video processing API for automation. With its hosted infrastructure, developers can focus on building applications without worrying about server management. Start leveraging FFMPEGAPI.net for your video processing needs today!

Ready to Start Processing Videos?

Get your free API key and start merging videos in minutes

Get Started Free