Resize Video

Change video resolution with preset or custom dimensions.

Browser Processing Only (Offline Ready)
1

Upload your file

Drag & drop or click to select a file from your device.

2

Adjust settings

Configure options to get the result you want.

3

Download result

Get your processed file instantly. No waiting.

Key Features

Resize Video Online Free

Change video resolution instantly. No software needed, works in any browser, completely free.

720p, 480p, 360p Presets

One-click presets for social media, email, or mobile. Or enter custom dimensions for exact control.

No Stretching - Perfect Ratio

Aspect ratio locked automatically. Your video stays proportional at any size, no distortion.

Shrink File Size 50-80%

Downscale 4K/1080p videos for smaller files. Perfect for email attachments and social sharing.

Works with All Video Types

Resize MP4, MOV, AVI, WebM, MKV files. Output keeps same format, ready to use anywhere.

Private Browser Processing

Your video never uploads. All resizing happens locally on your device. Safe and secure.

About This Tool

What is Resize Video?

Resize Video changes video resolution with preset options (720p, 480p, 360p) or custom dimensions. Downscale large videos for web, mobile, or social media, or adjust resolution for specific platform requirements.

Common Use Cases

  • Social Media: Resize for Instagram, TikTok, or YouTube requirements
  • Mobile Optimization: Downscale 4K/1080p videos for mobile viewing
  • Web Embedding: Resize for optimal web player dimensions
  • Storage Savings: Reduce resolution to save storage space
  • Email: Downscale videos for email-friendly file sizes

Privacy-First Video Resizing

Video resizing runs entirely in your browser using FFmpeg.wasm.

  • Your videos never leave your device
  • No server processing or uploads
  • Works offline after FFmpeg core is loaded

Related Tools

Compress Video

Reduce video file size with adjustable quality presets.

Trim Video

Cut and trim video clips to the desired length.

Convert Video Format

Convert videos between MP4, MKV, and AVI formats.

FAQ

720p (1280px wide), 480p (854px wide), and 360p (640px wide). You can also enter a custom width.
Yes, the height is automatically calculated to maintain the original aspect ratio.
No. All processing happens entirely in your browser. Your data never leaves your device — nothing is uploaded to any server.
Yes. Once the page has loaded, the tool works completely offline. For the best experience, install PrivaDeck as a PWA from your browser.
There are no server-imposed limits. The maximum file size depends on your device's available memory and browser capabilities. Most modern devices handle files up to several hundred MB without issues.