5 Trusted Online Video Resizers To Modify Format with Ease

Explore 5 in-demand online video resizers that help you quickly change video size for social platforms or devices. Fast, simple tools made for creators and editors. Additionally, use CapCut to edit, crop and export videos without losing any quality.

video resizer online
CapCut
CapCut
Jun 26, 2025
11 min(s)

Using an online video resizer is helpful when a video doesn't fit the size needed for social media, websites, or email attachments. Whether you're a content creator, marketer, or student, resizing a video helps match platform requirements, save storage, or improve loading speed.

This article lists the top 5 online video resizers for getting videos with perfect aspect ratios for social media.

Table of content
  1. What is an online video resizer
  2. How to pick the right online video resizer
  3. The 5 best and free online video resizers
  4. Expert techniques to use a free online video resizer
  5. The smartest offline way to resize videos on PC: CapCut desktop
  6. Conclusion
  7. FAQs

What is an online video resizer

An online video resizer is a web-based tool that helps you change the dimensions of a video. You can make a video smaller or larger to match the size requirements of platforms like Instagram, YouTube, or TikTok. It works directly in your browser, so there's no need to install software. Most tools let you choose width, height, aspect ratio, or file size settings. Some also provide basic editing features like cropping or trimming.

How to pick the right online video resizer

Before choosing a free online video resizer, it's important to check a few key features. Not all tools are the same, and picking the right one depends on your needs, like video format, speed, and output quality. Here are some quick ways to choose the perfect tool for resizing videos:

  • Format support

A good online video resizer should support popular video formats like MP4, MOV, AVI, and MKV. This helps you avoid the hassle of converting files before resizing. Using a tool with wide format support makes the process much faster and easier.

  • No watermark

Many free tools add a watermark to resize videos, which can look unprofessional. A quality online video size resizer lets you export clean videos without forced branding. Always choose a video resizer that keeps your final video free from marks or logos.

  • Aspect presets

Preset aspect ratios help your video fit perfectly on platforms like Instagram, TikTok, or YouTube. A smart free online video resizer includes 1:1, 16:9, and 9:16 presets for quick resizing. These presets in a video resizer save time and prevent framing mistakes.

  • Fast processing

Time-saving is important, especially when handling large files or many videos. A fast online video size resizer processes videos quickly without freezing or crashing. Choosing an efficient tool improves your workflow and reduces delays.

  • File limits

Some tools have file upload limits, usually between 500MB to 1GB. A flexible free online video resizer should let you resize larger files or offer compression. Knowing the file limits of your video resizer helps avoid errors during upload.

The 5 best and free online video resizers

There are many tools available to resize videos, but not all of them are easy to use or truly free. To save you time, we've listed below some of the best and most free online video resizer tools that work well for different needs:

Adobe Express

Adobe Express is a web-based tool from Adobe that simplifies video resizing with preset options for various platforms. It's ideal for users who want quick, clean resizing without needing advanced editing skills. You can choose square, portrait, or widescreen layouts in a few clicks. It also gives options to trim or mute the video during resizing.

Interface of Adobe - the best online video resizer

Clideo

Clideo is an easy-to-use online video resizer with no watermark that works directly in your browser. It supports resizing by custom width/height or aspect ratio and ensures format changes during export. Clideo is ideal for quick tasks where file size, frame dimensions, or platform fit matter. The interface is simple, and the tool works well with different formats.

Interface of Clideo - an easy to use online video resizer

Canva

Canva provides more than design; it also includes a user-friendly online video resizer without a watermark. Perfect for social media creators, Canva lets you resize videos with preset templates and drag tools. You can also add text, music, and elements during resizing, making it great for marketing content. Canva is suitable for users looking for an all-in-one platform that works on both mobile and desktop.

Interface of Canva - a highly efficient online video resizer

Ezgif

Ezgif is a basic but very effective free online large video resizer that focuses on utility rather than design. It's ideal for quick video adjustments when you don't need extra editing. The tool supports direct upload, lets you enter specific dimensions, and provides quick previews. While the interface is not fancy, Ezgif is one of the fastest and simplest options, with no login required.

Interface of Ezgif - another free online video resizer

Videobolt

Videobolt's online video resizer with no watermark is designed for creators who want visual quality and control. It lets you resize and preview high-quality video templates before final export. With advanced customization and preview tools, it's a solid option for promotional content. Though mostly known for motion graphics, its video resizer is free for basic use and easy to navigate.

Interface of Videobolt - a user-friendly online video resizer

Expert techniques to use a free online video resizer

Using an online video resizer is simple, but a few expert techniques can help you get better results. These tips will make your resized videos look clean, load faster, and fit perfectly on any platform. Here's how to use your video resizer more effectively:

  • Lock the aspect ratio to prevent video distortion

Always lock the aspect ratio before resizing to avoid stretched or squished visuals. Most online video resizer tools have a lock option, like turning it on to keep the video's original shape. This keeps your content looking sharp and professional on all screens.

  • Set exact pixel dimensions for precise resizing

Manually entering width and height gives you more control over the final output. Many online video resizer tools let you set exact pixel values instead of just choosing presets. This is helpful when resizing websites, app frames, or custom templates.

  • Compress video size to improve load and upload times

Large videos can take a long time to upload or buffer during playback. Some online video resizer tools also offer compression to shrink the file size without losing quality. Smaller files save bandwidth and make sharing easier, especially on slower networks.

  • Preview the resized video to catch quality or cropping issues

Before downloading, always preview the video in your online video resizer tool. This helps you spot any unwanted cropping, quality drops, or off-center framing. A quick check can save time by avoiding re-edits later.

  • Pick the right video format for your target platform

Different platforms prefer different formats like MP4, MOV, or WebM. A good online video resizer lets you choose the best format during export. This ensures your video plays smoothly and keeps its quality across all devices.

While free online video resizers are useful, they can have some downsides, like file size limits, slower speeds, or limited editing features. These issues can be frustrating, especially when working with large or high-quality videos. That's where CapCut comes in as a smoother, all-in-one solution.

The smartest offline way to resize videos on PC: CapCut desktop

The CapCut desktop video editor is the smartest offline way to resize videos on a PC without dealing with upload limits or slow internet. It gives you full control over video dimensions, format, and quality, all without relying on online tools. Perfect for large files or detailed editing, it makes resizing faster and more reliable.

Interface of the CapCut desktop video editor - an offline video resizer

Key features

Here are some key features of the CapCut desktop video editor that make offline video resizing smarter and more flexible:

  • Easily auto-reframe videos

Automatically adjusts the framing for different aspect ratios, great for converting one video for multiple platforms and devices.

  • Support manual resizing

Its video resizer lets you enter exact dimensions for precise resizing, which is useful when you need to match a custom frame or screen size accurately.

  • Efficient AI video upscaler

CapCut's AI video upscaler improves video quality while resizing low-resolution clips, perfect for old footage or social media uploads without extra tools.

  • Various video effects

Adds motion, transitions, or overlays while resizing, ideal for creators who want vibrant output in one go effortlessly.

  • Export HD videos (1080p up to 4K)

Saves resized videos in high resolution without quality loss, great for YouTube or large-screen playback with clear visuals.

How to resize videos on PC using CapCut

You can resize videos on a PC using CapCut by first downloading the editor from its official website. Click the button below, choose your operating system, and start the free download. After that, open the setup file and follow the simple steps to install CapCut on your computer.

    STEP 1
  1. Import the video

Open the CapCut desktop video editor, click "Import" or simply drag and drop your video into the workspace. After that, place it onto the timeline to begin editing.

Importing a video into the CapCut desktop video editor
    STEP 2
  1. Resize the video

Select the video in the timeline, then go to the "Basic" editing tab. Under the "Transform" section, use the "Scale" slider to adjust the video size. To customize the dimensions, disable "Uniform scale" and enter specific height and width values.

You can also click on "Ratio" to choose an aspect ratio suitable for platforms like Instagram or YouTube. To crop manually, select "crop" above the timeline. To enhance your video's appearance, consider adding filters.

Resizing a video in the CapCut desktop video editor
    STEP 3
  1. Export and share

Once you've resized and edited your video, click "Export," select the desired format, and click "Export" again to save it. You can also share it straight to social media by selecting "Share."

Exporting a video from the CapCut desktop video editor

Conclusion

An online video resizer is a quick and easy way to adjust your videos for social media, websites, or storage. These tools help you change size, aspect ratio, or format without needing any software. But they may have limits like watermarks, slow upload, or file size caps. For a smoother experience with more control and no internet issues, the CapCut desktop video editor is a smart offline choice worth trying.

FAQs

    1
  1. Does any free online video resizer support custom resolution?

Yes, many free online video resizers support custom resolution, where you can set the exact width and height. Tools like Ezgif and Clideo let you manually adjust dimensions without presets. However, some limit resolution options or add watermarks. For full control without limits, try the CapCut desktop video editor.

    2
  1. Can I resize videos for specific platforms like TikTok or Instagram?

Most online video resizer tools provide aspect ratio presets for TikTok, Instagram, YouTube, and more. These presets help you resize videos quickly without manual input. Still, not all tools support high-quality exports or editing. However, the CapCut desktop video editor lets you resize and fine-tune videos for any platform easily.

    3
  1. Will resizing a video reduce its quality?

Resizing may lower video quality if the tool compresses too much or lacks proper format options. Free online video resizers often reduce resolution or bitrate to shrink the file size. Using the right export settings helps avoid quality loss. The CapCut desktop video editor resizes videos without compromising visual clarity.

Hot and trending