Video Resolution Change Made Simple: 5 Methods You Must Try

November 12, 2025Ashley Mae

Video resolution, the number of pixels displayed horizontally and vertically, plays a crucial role in video quality and file size. Whether you are editing a captured video, preparing content for social media, or uploading to a specific platform, understanding how to change video resolution is a valuable skill. This post shares five methods to increase or reduce video resolution seamlessly.

Part 1. Best Way to Change Video Resolution
Part 2. Change Video Resolution in Premiere Pro
Part 3. Change Video Resolution in iMovie on Mac
Part 4. Increase or Reduce Video Resolution Online
Part 5. FAQs on How to Change Video Resolution

Part 1. Best Way to Change Video Resolution with Enhanced Quality

While numerous online tools and software programs can alter a video’s resolution, VidHex stands out for its powerful resolution changing, streamlined workflow, and efficient processing. Leveraging the latest artificial intelligence, this tool can not only change resolution of video but also enhance video quality by increasing its FPS, brightening the dark scenes, converting SDR to HDR, and eliminating noise and grain. Moreover, it supports a wide range of formats and offers granular control over resolution settings. This video resolution changer also includes additional tools to customize your videos further.

Key Features:

• Upscale video to 4K quality with AI technology

• Restore blurry footage to natural clarity

• Remove grain and noise intelligently

• Support various formats like MP4, AVI, MKV, etc.

• Speed up working efficiency via cloud acceleration

• Process multiple projects at the same time

Free DownloadFor Windows

100% Secure. No Ads.

Free DownloadFor Windows

100% Secure. No Ads.

Here is a detailed guide to help you use this tool to upscale or downscale your video resolution.

Step 1.

Download the video resolution changer from the official website and run it on your device.

Step 2.

Import your low-resolution video by hitting the Click or drag & drop file(s) here area.

Step 3.

Select the model that suits your requirements. A detailed explanation is provided to each AI model.

Step 4.

Click the Preview button to view the result. You can choose to view it in full screen or compare it with the original version.

Step 5.

Export the video by clicking the Export Full Video button.

Ready to give your videos a stunning upgrade? Download VidHex today and easily adjust video resolution with AI precision. Experience smoother, clearer, and more vibrant visuals in just a few clicks with no editing skills required!

Free DownloadFor Windows

100% Secure. No Ads.

Free DownloadFor Windows

100% Secure. No Ads.

Part 2. Change Video Resolution in Premiere Pro

Adobe Premiere Pro provides a number of different tools to modify video resolution and structure your project for different platforms. You can change video resolution but can also vary frame rate, aspects ratio, and other key specs for an optimized end product. Moreover, this video resolution converter seamlessly integrates video resizing with other editing tasks within the same workflow.

Step 1.

Launch Adobe Premiere Pro and open the project you want to edit. Go to the Sequence menu at the top, then select Sequence Settings. This opens the Sequence Settings window, where you can adjust resolution, frame rate, and aspect ratio.

Step 2.

In the Video area of the Sequence Settings window, locate the Frame Size section. Decide what width and height you want, or select a preset from the dropdown menu. If you need to change special settings for the project, this is a good time to adjust the Frame Rate and Pixel Aspect Ratio. Choose OK to apply your changes.

Note: Upscaling low-resolution videos can introduce artifacts, pixelation, and blurriness. Premiere Pro cannot add detail that wasn’t in the original footage, so quality improvements are limited.

Step 3.

Premiere Pro automatically scales the sequence to the new resolution, but individual clips may not fit perfectly. Select a clip, go to the Effect Controls panel, and use the Scale tool to adjust the size so it fills the frame properly. You may also reposition clips to maintain composition and avoid black bars.

Step 4.

Go through your sequence to see each clip and make sure no clips are cropped or distorted. When you’re ready, go to File, click Export, then select Media to render your project to the new resolution. You’ll need to determine the appropriate format settings based on your desired output.

Limitations

• Upscaling low-resolution footage may result in blurriness or visible artifacts.

• Sequence settings only adjust the canvas, but they don’t improve the original video quality.

• Large upscaling can significantly increase render time.

• Requires manual adjustment for each clip if scaling is inconsistent.

Part 3. How to Change Video Resolution in iMovie on Mac

iMovie is Apple’s built-in video editing software that makes it easy to adjust your video’s resolution before exporting. Follow these steps to modify your resolution in iMovie.

Tip: While this guide is for Mac users, the same logic applies if you’re exploring how to change video resolution on iPhone using the iMovie app.

Step 1.

Open the iMovie project containing the video you wish to export on your Mac. If you don’t have an existing project, click Create New Project and import your video. Once your footage is in the timeline, ensure it’s properly trimmed or edited as needed.

Step 2.

When you’re ready to change the resolution, hit the Share button.

Step 3.

From the drop-down list, select Export File (File icon). It opens the Export Settings window, where you can modify output settings such as format, resolution, and quality.

Step 4.

In the Resolution drop-down menu, choose your preferred resolution. You can also adjust the Quality and Compress options to balance faster export with higher quality.

Step 5.

Click Next, select the destination folder, and then click Save to export your video.

Limitations of Changing Resolution in iMovie

• iMovie doesn’t offer custom resolution settings. You can only pick from Apple’s preset options (720p, 1080p, or 4K).

• Upscaling from a low-resolution source doesn’t add real detail and can make it appear blurry.

• The Mac version provides more control than iMovie on iPhone, but both still lack professional fine-tuning options.

• It takes more processing time and enough disk space to export 4K videos.

Part 4. Increase or Reduce Video Resolution with 2 Online Converters

While software like Video Converter Ultimate or Adobe Premiere Pro offers robust control, online converters provide a convenient solution for simple adjustments. This section explains how to increase and decrease video resolution using two popular online tools.

Change Video Resolution Online with 123APPS Online Video Resizer

The 123APPS Online Video Resizer is an easy-to-use web tool that lets you resize your video without installing any software. The tool can resize video files from a variety of sources, including Google Drive, Dropbox, and direct video URLs. Follow the steps below to change video resolution online easily.

Step 1.

Launch your favorite web browser, then visit the 123APPS Resize Video site. Select the Open file button. Add a video from your PC, Dropbox, or Google Drive. Once uploaded, the video will automatically load into the online editor.

Step 2.

Navigate to the Resolution tab. You can also manually change settings such as the aspect ratio, bitrate, format, and frame size. Use the preview to check how your video looks after applying these adjustments.

Step 3.

When all adjustments are set, click the Save button to start processing your video. The site will automatically convert and resize your file.

Convert Video Resolution Online Using Clideo

Clideo is another user-friendly online tool with free and paid versions that offers similar features. It also provides a range of made-for-you social media presets and lets you manually configure custom resolutions. Follow these steps to use it:

Step 1.

Visit the Clideo Video Resizer tool. Click the + Choose file button. Add your video, and once uploaded, it will automatically appear in the editor preview window.

Step 2.

Under the Resize for section, pick a preset for popular platforms. Simply select the platform and the post type from the dropdown menu. If you prefer a custom resolution, manually enter your desired width and height values. To guarantee ideal alignment, you can also move your video within the frame or change the aspect ratio.

Step 3.

After setting your preferred resolution, click the Export button to begin processing. Await the completion of the video conversion process. After finishing, you can click Download to save the outcome to your device or cloud storage after previewing it.

Part 5. FAQs on How to Change Video Resolution

Can I downscale the video resolution?

Yes, you can easily downscale the video resolution using the introduced desktop software and online video resizers.

Can I change the video resolution with AI?

You can partially change video resolution with AI, but it's a process called upscaling, not directly changing the resolution. Try using the popular Aiseesoft Video Enhancer.

Can I convert video formats to change video resolution?

No, converting video formats does not directly change the video resolution. Although they are both related to video quality, they serve different purposes.

Conclusion

This blog has provided five useful methods for you to change video resolution. If you prefer high efficiency and simple workflows, you’d better try the first video resolution changer, which can not only guarantee trustworthy results but also conserve your time.