Video Resizer

A fast web-based tool to resize video dimensions, adjust aspect ratios, and export for various platforms.

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1,236+
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 Video Resizer tool enables precise dimension changes and aspect-ratio adjustments for video assets. It targets creators, editors, and teams who need consistent outputs across platforms without multiple manual steps. The service computes final dimensions, applies crop or letterbox choices, and re-encodes the video with common codecs. This reduces workflow fragmentation by delivering a single source file configured for specific feeds. The tool supports presets for social formats (1:1, 9:16, 16:9), preserves essential visual content, and offers bitrate and frame-rate controls to balance quality and file size. Its domain focus is automated, standards-aligned resizing and encoding, not color grading or watermarking. Use cases include repurposing a 4K landscape clip for Instagram reels or delivering web-optimized assets for a client project. The core differentiators are explicit dimension handling, flexible cropping strategies, and straightforward export configuration that aligns with platform specs and client requirements. Output metadata includes width, height, and estimated size to help planning and asset management.

How to Use

  1. Upload a source video or provide a file URL.
  2. Enter target width and/or height or specify a target aspect ratio (e.g., 1:1, 16:9, 9:
  3. .
  4. Select crop or letterbox and set output format plus bitrate/audio settings.
  5. Run resize to produce the new video; review computed dimensions and quality estimates.
  6. Download the resized file or add it to a batch workflow.
How to use video resizer clideo

Frequently Asked Questions

Find Quick Answers

Which input formats are supported?
The tool accepts common video inputs such as MP4, MOV, and AVI with codecs like H.264 and HEVC. If a source uses an unsupported codec, the system will attempt to transcode to a compatible intermediate format before resizing.
Can I resize multiple videos at once?
Batch processing is available as an advanced feature. It queues multiple inputs, applies the same or different presets, and outputs are produced to a user-specified location or batch folder.
Will audio stay in sync after resizing?
Yes. The tool preserves or re-syncs audio to match the new video duration and frame rate. If frame-rate changes are required, the encoder adjusts audio samples to maintain synchronization.
Are there size or speed limitations?
Processing time scales with file length and resolution. There are per-job size limits and platform-dependent throughput. Very large files may require queued processing and longer wait times.

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