Convert one or more MP4 files to WEBM using an interactive, fast, and free video converter tool.
or drop your MP4 files here
Conversion Settings
30
Sets the number of frames per second in the video. 30 fps is standard; higher values produce smoother motion at the cost of file size.
Sets the number of frames per second in the video. 30 fps is standard; higher values produce smoother motion at the cost of file size.
Sets the output video resolution in width x height format. Common sizes: 1280x720 (HD), 1920x1080 (Full HD), 640x360 (SD). Leave blank to preserve original size.
Sets the output video resolution in width x height format. Common sizes: 1280x720 (HD), 1920x1080 (Full HD), 640x360 (SD). Leave blank to preserve original size.
16:9
Sets the pixel aspect ratio of the video. 16:9 is typical for modern screens; 4:3 is used for older formats.
Sets the pixel aspect ratio of the video. 16:9 is typical for modern screens; 4:3 is used for older formats.
2000k
Sets the video bitrate to control quality and file size. Higher bitrate improves quality but increases file size.
Sets the video bitrate to control quality and file size. Higher bitrate improves quality but increases file size.
1
Select encoding pass. Two-pass encoding improves bitrate distribution for better quality, but takes longer.
Select encoding pass. Two-pass encoding improves bitrate distribution for better quality, but takes longer.
128k
Sets the audio stream bitrate. Higher values give better sound but increase file size.
Sets the audio stream bitrate. Higher values give better sound but increase file size.
Converted Files
Disclaimer:Please be aware that due to limited server storage, converted files will be automatically purged over time for optimal server performance.
How to use this MP4 to WEBM Converter?
Choose files or drop them into the input area.
Adjust the conversion settings and click Convert.
Download the converted files when processing finishes.
{
"convert": "mp4-webm",
"multiple": true,
"from": "mp4",
"to": "webm",
"controls": [
{
"type": "dropdown",
"name": "frame_rate",
"label": "Frame Rate (fps)",
"options": [
{
"label": "15 fps",
"value": "15"
},
{
"label": "24 fps (Film)",
"value": "24"
},
{
"label": "30 fps (Standard)",
"value": "30"
},
{
"label": "60 fps (Smooth)",
"value": "60"
}
],
"defaultValue": "30",
"desc": "Sets the number of frames per second in the video. 30 fps is standard; higher values produce smoother motion at the cost of file size."
},
{
"type": "text",
"name": "frame_size",
"label": "Frame Size (Resolution)",
"placeholder": "e.g., 1280x720 or 1920x1080",
"desc": "Sets the output video resolution in width x height format. Common sizes: 1280x720 (HD), 1920x1080 (Full HD), 640x360 (SD). Leave blank to preserve original size."
},
{
"type": "dropdown",
"name": "aspect_ratio",
"label": "Aspect Ratio",
"options": [
{
"label": "16:9 (Widescreen)",
"value": "16:9"
},
{
"label": "4:3 (Standard)",
"value": "4:3"
},
{
"label": "1:1 (Square)",
"value": "1:1"
}
],
"defaultValue": "16:9",
"desc": "Sets the pixel aspect ratio of the video. 16:9 is typical for modern screens; 4:3 is used for older formats."
},
{
"type": "dropdown",
"name": "video_bitrate",
"label": "Video Bitrate",
"options": [
{
"label": "500 kbps (Low)",
"value": "500k"
},
{
"label": "1000 kbps (Standard)",
"value": "1000k"
},
{
"label": "2000 kbps (HD)",
"value": "2000k"
},
{
"label": "4000 kbps (Full HD)",
"value": "4000k"
}
],
"defaultValue": "2000k",
"desc": "Sets the video bitrate to control quality and file size. Higher bitrate improves quality but increases file size."
},
{
"type": "dropdown",
"name": "video_pass",
"label": "Encoding Pass",
"options": [
{
"label": "Single Pass",
"value": "1"
},
{
"label": "Two Pass (Better Quality)",
"value": "2"
}
],
"defaultValue": "1",
"desc": "Select encoding pass. Two-pass encoding improves bitrate distribution for better quality, but takes longer."
},
{
"type": "dropdown",
"name": "audio_bitrate",
"label": "Audio Bitrate",
"options": [
{
"label": "64 kbps",
"value": "64k"
},
{
"label": "128 kbps (Standard)",
"value": "128k"
},
{
"label": "192 kbps",
"value": "192k"
},
{
"label": "256 kbps",
"value": "256k"
}
],
"defaultValue": "128k",
"desc": "Sets the audio stream bitrate. Higher values give better sound but increase file size."
}
],
"note": "The MP4 to WebM conversion uses the VP8/VP9 codec for video and Vorbis or Opus for audio. Most modern browsers support WebM natively. Two-pass encoding gives better results for high-quality videos. For compatibility, use resolutions divisible by 2 and standard aspect ratios like 16:9 or 4:3.",
"type": "video",
"operation": "convert"
}
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