Video

Video Converter≈

Convert video to MP4, WebM, MKV, MOV, AVI or GIF locally in your browser. Re-encoding can change quality.

Tools will load when you run.
Video output

Up to 4K (3840×2160 or portrait), with a resolution-dependent duration: up to 10 minutes at 1080p or 150 seconds at 4K. File and output limits apply separately. GIF exports at 480 pixels wide and 12 fps; its bitrate setting is ignored. Keep your original file. Processing starts after the local engine loads automatically.

How to use Video Converter

  1. Choose your MP4, WEBM, MKV, MOV, AVI, GIF, MPEG, MPG, M4V, OGV, TS.
  2. Upload a video up to 128 MiB, within the resolution and duration limits below, then choose the output format and bitrate.
  3. Convert and download your video. Keep the original; use the CLI for larger files or custom codecs.

Process multiple files

Use a workflow to apply the same settings to each file.

Formats and requirements

Input formats
MP4, WEBM, MKV, MOV, AVI, GIF, MPEG, MPG, M4V, OGV, TS
Output
Depends on the selected output options
Availability
Free in your browser and through the CLI
Files per operation
1
Browser file limit
128 MiB per file, 128 MiB total

What to expect

Available codecs depend on your FFmpeg build; re-encoding can lose quality. Browser limits: Up to 4K (3840×2160 or portrait), with a resolution-dependent duration: up to 10 minutes at 1080p or 150 seconds at 4K. File and output limits apply separately.

Do my files leave my device?

No. Thanks to advanced file-processing technology, your files are processed directly on your device, inside your browser. OneKit does not receive your input files or results. Required public processing libraries may download when you first use the tool.

File privacy and local processing →

Install OneKit

Keep OneKit in its own app window, with a shortcut on your device.