Back to Blog

Seamless Video Transformation: Convert Horizontal Videos to Vertical with FFMPEGAPI.net

June 2026 FFMPEG API Team

In the era of mobile-first content consumption, having your videos in the right format is essential. FFMPEGAPI.net provides a powerful hosted REST API for FFmpeg-powered video and audio processing, making it easy to convert horizontal videos to vertical format with just a few simple API calls. This guide will walk you through the process of using the Convert to Vertical endpoint, providing practical examples and highlighting the benefits of using FFMPEGAPI.net for your video processing needs.

What is the Convert to Vertical Endpoint?

The Convert to Vertical endpoint is a convenient way to transform your horizontal videos into a vertical format, which is ideal for platforms like Instagram Stories or TikTok. This endpoint not only ensures that your content is mobile-oriented but also allows you to add a watermark for branding purposes.

  • Transforms horizontal video to a vertical format.
  • Allows for optional watermarking.
  • Ideal for mobile applications and social media content.

How to Use the Convert to Vertical Endpoint

To use the Convert to Vertical endpoint, you need to send a POST request to /api/convert_to_vertical with the required parameters. Below are the parameters you need to provide:

1. **video_url** (required): The URL of the video you want to convert.

2. **watermark_url** (optional): The URL of the watermark image you want to overlay on your video.

3. **async** (optional): If set to true, the API will return a job_id immediately and process the conversion in the background.

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", "async": true }'
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',
    'async': True
}

response = requests.post(url, json=data)
print(response.json())

Why Choose FFMPEGAPI.net?

FFMPEGAPI.net offers a hassle-free experience for developers looking to integrate video processing into their applications. Here are some key advantages of using our API:

- **No Setup Required**: As a fully hosted solution, there’s no need for complex server setups or FFmpeg infrastructure management.

- **API-Key Authentication**: Secure your workflows with API-key authentication to manage access effectively.

- **Versatile Integration**: Perfect for automation, SaaS apps, content pipelines, and AI agents.

Transforming videos from horizontal to vertical format has never been easier, thanks to the Convert to Vertical endpoint at FFMPEGAPI.net. Whether you're developing a mobile application or enhancing your content strategy, our hosted REST API simplifies video processing without the hassle of server management. Start integrating today and elevate your video content with ease!

Ready to Start Processing Videos?

Get your free API key and start merging videos in minutes

Get Started Free