Popular size presets
Scale to 1080p, 720p, 480p, 360p, or 240p. Letterbox mode fits vertical, square, or widescreen clips into the exact output size with black bars—no stretching.
Free Online Video Resizer
Scale MP4, MOV, MKV, and WebM videos to 1080p, 720p, 480p, and more in your browser—free, no install, no upload. Choose letterbox mode to fit any aspect ratio into the exact output size with black bars—no stretching. Processing stays on your device for privacy.
Drag & drop videos here
or click anywhere in this area to choose files
MP4, MOV, MKV, WebM, AVI and more · Max 500 MB per file
Processed locally in your browser — files never leave your device. Need trim, crop, or other edits? Video editor online or try the Windows desktop app.
Why Use This Free Online Video Resizer?
Match platform requirements for YouTube, TikTok, and email—same privacy-first approach as our other online tools.
Batch resize
Add multiple clips and export each one at the same target resolution and scaling mode.
Privacy-first
Everything runs on your device in the browser—your originals stay private.
Supported Input Formats
Works with popular video formats for tutorials, highlights, social clips, and more.
Video inputs
MP4, MOV, MKV, WebM, AVI, MPEG, and other common video files up to 500 MB each.
Shorter clips process faster in the browser.
Video output
Export as MP4 (H.264) or WebM—with audio when a track is present.
Output filename includes the target size (e.g. clip_720p.mp4). Letterbox mode outputs the exact preset dimensions; fit-to-width keeps aspect ratio without black bars. Upscaling cannot add detail beyond the source.
How to Resize a Video Online in 3 Steps
From full resolution to the size you need—in minutes.
1
Add videos
Drag and drop videos or click Choose Files. Multiple files can be queued at once.
2
Choose output size
Select playback speed and output format, then click Resize Video.
3
Download
Save your resized videos directly to your device when processing completes.
More Free Video & Audio Tools
Process files instantly in your browser — 100% free, no installation, and no registration required.
Video Resizer FAQ
Answers to common questions about resizing videos in your browser.
Is this online video resizer free?
Yes. You can resize videos at no cost and without creating an account. Open the page, add your files, and click Resize Video.
Are my files uploaded to your servers?
No. Processing runs locally in your browser. Your files are processed on your device and are not sent to Videoradius servers.
Can I resize MP4 to 720p online?
Yes. Add an MP4 (or other supported video), choose 720p or another preset, and click Resize Video. Use Fit with black bars for the exact 1280×720 output without stretching.
Does letterbox mode add black bars?
Yes. Fit with black bars scales your video to fit inside the target size and pads the rest with black bars—ideal for vertical or square clips that must match a widescreen resolution. Choose Fit to width if you prefer no black bars.
Will upscaling improve video quality?
No. Upscaling to 1080p or 1440p cannot add detail that was not in the original file. Downscaling is best for smaller file sizes and faster sharing.
What is the maximum file size?
Each video can be up to 500 MB. Larger files may take longer depending on your device, browser, and chosen output size.
Need crop, compress, or faster batch processing?
For advanced editing, GPU acceleration, and fully offline processing, try the Videoradius Video Converter desktop app for Windows. You can also use our free Online Video Crop or Online Video Compressor tools.
Need Pro Video Editing on Windows?
Videoradius Video Converter supports speed control, 300+ formats, GPU acceleration, and 100% offline processing.