Resizing a video can feel like a tedious chore, especially when every social media platform demands a different format and constantly changes its own specification. A horizontal YouTube video doesn’t translate well to TikTok’s vertical feed, and Instagram’s square format presents another challenge. If done manually, resizing takes time and often leads to cropped-out subjects or compromised quality.

AI Video Cut eliminates these frustrations. With smart automation, accurate face recognition and cropping, it resizes videos while preserving important visual elements. Whether you need a vertical format for Instagram Reels or TikTok or a square version for YouTube, X, or LinkedIn, this tool ensures your video is optimized in just a few clicks.

Why Resizing a Video Matters

Not all platforms display videos the same way, and using the wrong dimensions can make your content look out of place. A poorly sized video can lead to black bars, awkward cropping, or distorted visuals, all of which reduce engagement—people will just swipe it up when watching. On the other hand, a well-fitted video grabs attention, enhances the viewing experience, and makes your content look professional.

Instead of manually cropping and adjusting every frame, AI Video Cut takes care of the hard work for you. It ensures your video fits seamlessly on any platform, whether you’re posting a YouTube tutorial, a TikTok clip, or an Instagram Reel.

How AI Video Cut Simplifies Resizing

Traditional resizing tools require careful adjustments, but AI Video Cut streamlines the process with automation. Its smart cropping feature identifies the most important elements of your video and keeps them in frame. If resizing leaves empty spaces, the tool fills them with blurred backgrounds or color-matched extensions, maintaining a polished look.

Choosing the right aspect ratio is effortless. With AI Video Cut, you can select presets tailored for YouTube and Vimeo (16:9), TikTok, Shorts, and Reels (9:16), Instagram Feed, X (formerly Twitter), LinkedIn, and Facebook feed (1:1), or keep the video size as is. Once you upload your video, the tool automatically resizes it without sacrificing quality.

How to Resize a Video for Instagram Reels, Shorts & TikTok with AI Video Cut

Resizing a video with AI Video Cut is a simple process.

1. Start by uploading your file directly from your device or paste a YouTube link. The tool supports a variety of formats, ensuring compatibility without the need for conversions.
2. Select the prompt that will cut your video in accordance with your purpose: you want it to be an ad, tutorial, teaser, anything — AI Video Cut can handle it.

3. Next, choose your desired aspect ratio based on where you plan to publish. If you're creating a TikTok or Instagram Reel, 9:16 is the best choice. For YouTube, 16:9 works best, while Instagram’s feed benefits from a 1:1 ratio. AI Video Cut automatically adjusts your video to fit the selected format.
4. Choose the video length.

5. Select the captions style if your video has them.

Once resized, the tool generates a preview so you can check the framing. If needed, you can regenerate the video with other settings. When satisfied, download your resized video in high quality and share it directly on your platform of choice.

Social Media Video Specifications 2025

As of early 2025, here are the video specifications for several social media platforms:

Facebook

1. In-feed shared post video (landscape & portrait):
   • Resolution: 1280x720 (landscape), 720x1280 (portrait).
   • Minimum width: 1200 pixels.
   • Aspect ratio: 16:9 (landscape), 9:16 (portrait).
   • Maximum file size: 10GB (3GB max in Sprout).
   • Video length: 1 second to 240 minutes (45 minutes max if uploading in Sprout).
   • Recommended video formats: MP4, MOV.
   • Bitrate: 256kbps.
   • Frame rate: 30fps.
2. Stories:
   • Recommended resolution: 1080×1920 pixels.
   • Maximum file size: 4GB.
   • Maximum video length: 20 seconds.
3. Live:
   • Resolution: 1280×720 px.
   • Video length: Up to 8 hours.

Instagram

1. Feed Videos:
   • Maximum size: 650MB (up to 10 minutes long).
   • Minimum width: 500 pixels.
2. Stories: 1080×1080 pixels.
3. Reels:
   • Resolution: 1080×1920 pixels.
   • Minimum frame rate: 30 FPS.
4. Live videos: Up to 4 hours in duration.

Twitter (X)

• Recommended resolutions: 1280×720 (landscape) or 720×1280 (portrait).
• Aspect ratio: Between 2:1 and 1:1.
• Maximum file size: 1GB (512MB).
• Duration: Up to 2 minutes and 20 seconds.
• Frame rate: 30 FPS recommended.
• Formats: MP4 and MOV.

YouTube

• Aspect ratio: 16:9.
• Resolution: 1080p or 4K.
• Standard size: 1920×1080 pixels.
• Also supports 4K resolution at 3840×2160 pixels.

TikTok

• Resolution: 1080×1920 px.
• Aspect ratio: 9:16.
• Video max length: 10 minutes (Recommended: 15-60 seconds).
• Video max sizes: Mobile: 287.6 MB, Desktop: 2 GB.
• Formats: MP4, MOV, AVI, FLV.

Snapchat

• Image/video recommended resolution: 1080×1920 px (9:16 aspect ratio).
• Video formats: MP4, MOV.
• Video max length: 60 seconds per snap.
• Video max size: 1 GB.

To optimize videos for social media, it is essential to use MP4 or MOV formats, stick to 30 FPS for smooth playback, and match aspect ratios to each platform for better results.

Best Practices for Resizing Videos

1. Choose the right resizing tool

There are plenty of video editing tools available, but not all offer the features you need. If you're new to video editing, look for a free, user-friendly, and efficient web-based tool that simplifies the resizing process.

2. Maintain video quality

Imagine capturing a stunning beach scene from your vacation, only to find that resizing ruins the clarity. No one wants a blurry, pixelated video. Make sure the tool you use preserves quality and prevents distortion.

3. Support for multiple video formats

Not all tools handle every video format. If you download a video online and your editor doesn’t support its format, you’ll have to convert it first. Save yourself the hassle by choosing a tool that accepts a wide range of file types.

4. Keep important elements in frame

Cropping can lead to lost details, awkward framing, or missing key visuals. A good resizing tool should ensure that essential elements stay in view, even when adjusting for Instagram’s aspect ratio.

For the best results, it’s essential to choose the right aspect ratio for each platform. Text and graphics should remain within safe areas to prevent cropping. If you’re posting the same content across multiple platforms, consider creating different versions to ensure a perfect fit.

Resizing videos doesn’t have to be complicated. AI Video Cut simplifies the process, making it quick and efficient. Instead of struggling with manual adjustments, you can focus on creating content while the tool handles the formatting. Upload your video, pick the format, and let AI Video Cut do the rest.