MP4 to AVI Converter (Free, Online, No Upload)

Convert any MP4 file to AVI right in your browser. Nothing gets uploaded to a server. AVI is a legacy container format with broad compatibility across older media players and editing tools. The conversion runs locally using FFmpeg compiled for your browser, so your files stay on your device.

Try it in your browser

Loading FFmpeg engine... (~31 MB)

Use the API

curl -X POST https://renderio.dev/api/v1/run-ffmpeg-command \
  -H "X-API-KEY: ffsk_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
  "ffmpeg_command": "-i {in_video} -c:v mpeg4 -q:v 5 -c:a libmp3lame -q:a 4 {out_video}",
  "input_files": {
    "in_video": "https://example.com/input.mp4"
  },
  "output_files": {
    "out_video": "output.avi"
  }
}'

Need an API key? Get your free API key to start processing files programmatically.

Common Variations

Xvid compatible encoding

-i input.mp4 -c:v libxvid -q:v 4 -c:a libmp3lame -q:a 2 output.avi

Uncompressed for editing

-i input.mp4 -c:v rawvideo -c:a pcm_s16le output.avi

With target bitrate

-i input.mp4 -c:v mpeg4 -b:v 2M -c:a libmp3lame -b:a 192k output.avi

Related Operations

Free AVI to MP4 Converter Online | RenderIO Free MP4 to MOV Converter Online | RenderIO Free MP4 to WebM Converter Online | RenderIO Compress Video Online Free, No Upload Required | RenderIO

Need to process at scale?

Automate this with the RenderIO FFmpeg API. Process thousands of files programmatically or through no-code video automation.

Get your API key