Instagram Video Resizers: AI Solution & Easy Ways to Resize Video for Story, Reel, Feed, & IGTV

Uploading videos to Instagram can be tricky. Even if your content is amazing, the wrong video dimensions can ruin the viewer experience—cropping out key elements, reducing quality, or leaving black bars around your video. Whether you're a creator, marketer, or business owner, getting your video format right is essential to maximize engagement. That's where Instagram video resizers come in—even those powered by AI.

In this guide, we'll show you how to resize videos for Instagram using FlexClip's AI tool and traditional editing features, explore other online Instagram video resizers to help you resize your videos for feed, Reels, Stories, and IGTV effortlessly and keep them looking sharp.

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Part 1 Recommended AI-powered Instagram Video Resizer - FlexClip

One of the best online video resizers you can use to resize a video for Instagram is FlexClip. It is an AI-powered Instagram video resizer that offers multiple ways to convert any video into Instagram format in just a few clicks.

FlexClip combines traditional aspect ratio tool with advanced AI-powered resizing feature. Its AI keeps the main subject centered using face and object tracking, ensuring nothing important is cut out. You can resize videos to a variety of Instagram-friendly dimensions: square (1:1), vertical (4:5), landscape (16:9), or portrait (9:16). This makes it easy to format videos for Instagram feed posts, Reels, Stories, and IGTV, keeping your content sharp, professional, and perfectly framed.

Resize Video for Instagram with AI Resize Video with FlexClip Editor

Method 1 Auto-Resize Videos for Instagram with FlexClip AI

Say goodbye to awkwardly cropped Instagram videos with FlexClip's AI long to shorts tool. This AI-powered video resizer automatically formats your videos to 1:1, 4:5, or 9:16 for feed posts, Reels, Stories, and IGTV, while keeping faces and key subjects perfectly centered using AI face-tracking. In just a few clicks, your videos are optimized and ready to post, looking professional and engaging on every Instagram format.

AI Instagram Video Resizer - FlexClip Long to Shorts Tool

Now, let's check the detailed steps below to learn how to resize a video for Instagram with FlexClip AI:

Step 1 Open FlexClip's Long to Shorts Maker

Resize Video for Instagram with AI

Click the Resize Video for Instagram with AI button above to access FlexClip's Long to Shorts Maker. Then, upload the video you want to resize for Instagram. You can paste a YouTube link, upload a video from your computer, or even import a file from Google Drive—making it easy to prepare content for feed posts, Reels, Stories, or IGTV in just a few clicks.

Resize Video for Instagram with FlexClip AI - Access FlexClip's Long to Shorts Maker

Step 2 Adjust the Setting for Instagram Video

Once your video is loaded, FlexClip will automatically take you to the settings page, where you can customize how the AI converts your content. Choose the aspect ratio—9:16, 16:9, 1:1, or 4:5—to match your Instagram format, then adjust additional options such as language, clip type, subtitle style, and more to create the perfect Instagram video.

Resize Video for Instagram with FlexClip AI - Adjust the Long to Short Video Setting

Step 3 Resize Video for Instagram with One Click

After that, click the Generate button to start the conversion. FlexClip's AI will analyze your video, reframe it, highlight key moments, add automatic subtitles, and create multiple short clips that are perfectly sized for Instagram Reels (or feed posts, Stories, IGTV) using the aspect ratio you selected earlier.

Resize Video for Instagram with FlexClip AI - Generate Viral Shorts with One Click

Step 4 Preview and Download the AI-Generated Clips

Once your clips are generated, you can preview all the AI-resized videos. If you prefer a fully reframed full-length video instead of multiple short clips, simply tap the Trim button. Review the transcript and select the entire duration from start to finish. The AI will then recreate the full video in Instagram format, while keeping face-tracking and automatic captions enabled.

Resize Video for Instagram with FlexClip AI - Select and Trim Clip

Once satisfied, you can choose the clips to download and share it to Instagram. Need more precise edits to prefect your video? Just click the Open in Editor button and take your video clips into the built-in editor and make edits freely.

Resize Video for Instagram with FlexClip AI - Download or More Edits

Method 2 Manually Convert Video to Instaram Size by Changing Ratio

When resizing a video for Instagram, don't forget about FlexClip's built-in video editor, which offers powerful editing features, including video resizing. It supports multiple formats—square (1:1), vertical (4:5), landscape (16:9), portrait (9:16), and widescreen (21:9)—so you can import and resize your videos to fit perfectly on Instagram Reels, Stories, feed posts, and IGTV.

Resize Video for Instagram

Step 1

Access FlexClip's editor and Upload the video you want to resize for Instagram from your PC or phone and clik the plus icon to add the video to the timeline.

Resize Video for Instagram with FlexClip - Upload

Step 2

Now, find the ratio icon on the top left corner and select 9:16 for Instagram Reels, or 1:1, for Instagram feed and carousel posts. Then the video shall be automatically cropped and resized to fit that Instagram size.

Resize Video for Instagram with FlexClip - Change Ratio

Step 3

After that, you can use the Zoom feature on the top menu and drag and drop the scene on the canvas to highlight the center part and not miss the important information in your video.

Resize Video for Instagram with FlexClip - Adjust

Step 5

Make more edits to perfect your Instagram video with background music, text animation, funny stickers, filters, transitions, overlays, various shapes, etc. Also, you can try those AI tools to simplify your editing process, such as adding auto subtitles, generating AI voice narration, and more. Once you have done the editing, you can preview the video and finally click the Export button to save and share your Instagram video.

Resize Video for Instagram with FlexClip - More Edits

While you're in the editor, you can use its powerful features to resize the video for Insatgram in more creative ways, including using any background, trying the pre-made Instagram templates, adding border, etc. Keep reading.

Method 3 Resize Video for Instagram without Cropping via Background

Besides changing the video ratio directly to resize it for Instagram, you can also add any background(even a blurry one) that fit your video aesthetic to make your video fit the size of Insatgram without cropping out any important parts.

If you want to add a background to resize your video and make it fit on Instagam, FlexClip allows you to use any solid color, a photo, or a video from its extensive media library or even use the video footage itself for a blurry background. Now, let's check the way for how to add a blurry background to shape your video into that Instagram format.

Step 1

Upload your video from your computer or mobile. Or you can directly drag and drop the video you want to resize for Instagrm to the media section and apply them to the Timeline.

Resize Video for Instagram without Cropping in FlexClip - Upload

Step 2

Find the ratio icon on the top left corner, and choose your preferred aspect ratio for your Instagram video. Then go to the Zoom feature to fit your video to the new ratio.

Resize Video for Instagram without Cropping in FlexClip - Adjust Video

Step 3

Now, you will notice black bars above and below the video. Click the Background Color button, head over to the blur section. FlexClip will automatically add a blurry background that matches the original video. (You can also use a solid color background or upload any custom one at will.)

Resize Video for Instagram without Cropping in FlexClip - Blur BG

Bonus: Looking for a quick and effective way to resize your video for Instagram? You can try FlexClip's pre-made Instagram template directly!

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All of those templates are professionally designed and fully customizable, you can simply pick one you like, and then drag and drop your clips to replace the premade elements and make small adjustments. So, you can create a scroll-stopping Instagram video in minutes.

Part 2 Other Online Instagram Video Resizer for You

Besides FlexClip, there are more other Instagram Video resizers you can try to resize videos to perfectly fit Instagram Story, Reels, and Feed. Check out for reference.

Free Online Video Resizer for Instagram - Kapwing

The excellent online video editor, Kapwing, also provides a free online video resizer to help you resize a video for Instagram. With Kapwing's video resizer, you can adjust video dimensions for Instagram feed, story, and IGTV online in a few clicks. The only drawback is that you need to sign up when you resize a video for Instagram, otherwise, you'll download the video with a watermark.

How to Resize a Video for Instagram Free with Kapwing

# 1. Upload a video directly to Kapwing Video Resizer.

Resize Video for Instagram with Kapwing - Upload

# 2. Select the size you'd want to resize your video to, and you can select a preferred color as the video background.

Resize Video for Instagram with Kapwing - Resize

# 3. Once you finished, just click the "Export" button to download the video. You can download the video with the watermark or sign up to remove the watermark.

Resize Video for Instagram with Kapwing - Download

Free Online Video Resizer for Instagram - Resizegram

Resizegram is an online Instagram video resizer that can help you resize any video to fit Instagram recommended video dimensions for free. It supports converting a video to square (1:1), vertical (4:5), and portrait (9:16) dimensions. You can choose to crop the video or add padding (black or white borders, also known as bars).

How to Resize a Video for Instagram Free with Resizegram

# 1. Upload the video file to https://www.resizegram.com/.

# 2. Select the new video aspect ratio for your Instagram video - Instagram feed, story, or IGTV; and choose the resize type - pad or crop.

Resize Video for Instagram with Resizegram

# 3.Once you make your selection, just click the button "Resize Video" to start resizing the video for Instagram.

Free Online Video Resizer for Instagram - Fileconverto

Fileconvert is a powerful Multimedia File Converter, which can help convert, compress, and edit various video, audio, and PDF files. It also offers a free Instagram video resizer to resize a video for Instagram free without watermark, so it fits on the square (1:1), vertical (4:5), and portrait (9:16) dimensions.

How to Resize a Video for Instagram Free with Fileconverto

# 1. Visit https://www.fileconverto.com/, and turn to Video Tools to select the Instagram Video Resize tool.

Online Video Resizer for Instagram - Fileconverto

# 2. Upload your video to the Instagram video resizer.

Resize Video for Instagram with Fileconverto

# 3. Select the new video aspect ratio, choose the resize type, and then click the "Submit Now" button to start resizing the video for Instagram.

Free Online Video Resizer for Instagram - Clideo

Clideo offers an online video resizer to help resize video for Instagram, YouTube, Facebook, Twitter, and other social media. You can resize your video to be of exact width and height by inputting the values regardless of aspect ratio. You can also convert a video for Instagram with a fixed aspect ratio.

How to Resize a Video for Instagram Free with Clideo

# 1. Upload your video to Clideo's online video resizer.

Resize Video for Instagram with Clideo - Upload

# 2. When the editor opens, pick the dimensions you want to resize for your video based on the type of Instagram video post, and select a crop option - fill or fit the video, then click the "Resize" button.

Resize Video for Instagram with Clideo - Resize

# 3. Download the video with the watermark. If you want to remove the watermark, you need to pay for the subscription.

Resize Video for Instagram with Clideo - Download

Sandy /

Has year of professional photographing experience. Very much into recording every detail of life. She is passionate about all things related to video production, and loves to exploring tips and tricks about it.