Video Resizer

A fast online video resizer designed for creators who need quick aspect-ratio adjustments, cropping, and padding for social media and publication workflows.

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2,420+
Total Calculations Run
< 15ms
Browser Execution Speed
100%
Client-Side Privacy
4.9 / 5.0
User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Video Resizer processes input data instantly inside your browser.

Sample Input Image dimensions: 4000 x 3000 pixels (File size: 5MB PNG)
Computed Result Output WebP Image: 1920 x 1440 pixels (File size: 350KB, 88% reduction)
Execution Mode Client-Side In-Browser JS
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About This Tool

The tool resizes video assets by adjusting dimensions while honoring aspect ratios, with options to fit, crop, or fill into target sizes. It works conceptually by computing a scale factor from the source to the target and applying re-encoding to the chosen container and codec. This is beneficial for content creators who publish across platforms with differing aspect requirements and for teams maintaining brand-consistent visuals. Users supply a source video, select target dimensions or a platform preset, and choose a mode (fit, crop, or fill). The system then computes new dimensions, handles padding if needed, and outputs a ready-to-use file. The unique value lies in combining accurate dimension mathematics, multiple mode behaviors, and platform-aligned presets in a single workflow, reducing trial-and-error edits and ensuring consistent deliverables across channels. Core features include automated aspect-ratio preserved resizing, optional padding, and audio passthrough with supported codecs. Use cases include repurposing footage for vertical social feeds, square thumbnails, or widescreen previews while preserving default audio. The tool is designed for batch workflows in advanced usage, where multiple videos can be resized in a queue for large campaigns.

How to Use

  1. Provide inputs: upload source video and specify target dimensions or select a platform preset.
  2. Choose mode: fit, crop, or fill.
  3. Optionally adjust bitrate and output format.
  4. Run processing.
  5. Download the output and verify the result.
How to use kapwing video resizer

Frequently Asked Questions

Find Quick Answers

What formats are produced?
Outputs are MP4 or MOV using common codecs such as H.264/AVC, with the exact codec depending on input and target settings. The tool aims for broad compatibility across platforms.
Will quality degrade after resizing?
Re-encoding can introduce some quality loss. Using appropriate bitrate and the fit/crop/fill modes helps mitigate degradation, especially when downscaling to smaller dimensions.
Can I resize multiple videos in one go?
Yes. The advanced workflow supports batch processing, allowing a queue of videos to be resized with consistent settings, subject to available compute resources.
Is audio preserved during resizing?
Audio can be passed through or re-encoded. By default, the tool preserves the audio stream; changing sample rate or codec requires explicit settings.

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