WebFFmpeg

Resize & Compress

Dimensions are filled from the source video. Clear a field or set to -1 to preserve aspect ratio. Lower CRF = higher quality.

Extract audio track

Remove audio track

Output will be the same video with the audio stream stripped.

Animated GIF

Height is calculated automatically to preserve aspect ratio.

Playback speed

Rotate / Flip

Crop

Drag the box to move it. Drag the handles to resize.

Extract Thumbnail

Extracts a single frame at the given timestamp as an image file.

Reverse

Plays video and audio backwards. The whole clip is buffered in memory — keep clips under ~2 minutes for best results.

Fade In / Out

Set either value to 0 to skip that direction. Applied after trimming.

Adjust

Strip Metadata

Removes all embedded metadata (GPS, camera info, creation date, etc.) from the output file. Video and audio are re-encoded.

Embed Subtitles

Soft subtitles are the preferred format for VLC, browser players, and most video platforms. Hard-burning for social media requires a libass build.

Volume

1.0 = original  ·  >1 = boost  ·  <1 = reduce  ·  0 = silence. Audio is re-encoded; video is stream-copied.

Loop / Repeat

Streams are copied without re-encoding. The clip plays N times back-to-back. Trim is ignored for this operation.

Logo / Image Overlay

PNG with alpha gives cleanest results. Video is re-encoded to preserve overlay.

Mix Audio (Background Music)

Music loops automatically if it is shorter than the video. Video is stream-copied.

Concatenate (Join Clips)

Uses the concat filter — different resolutions and codecs are handled by re-encoding to H.264/AAC. Trim applies to the first clip only.

Side by Side

Both clips are scaled to the same height (horizontal) or width (vertical) then stacked. Re-encodes to H.264/AAC. Trim is ignored.

Picture in Picture

Overlay video loops if shorter than the main clip. Audio from the main clip is preserved. Trim applies to the main clip.

Media Info

Click Process Video to run a deep scan and log full codec & stream details below.

Raw FFmpeg

Args are split on whitespace. Wrap values containing spaces in double quotes, e.g. -vf "scale=1280:-2,hflip"

Pad to Aspect Ratio

Video is scaled down to fit; empty space is filled with the chosen color. Re-encodes to H.264.

Normalize Audio (EBU R128)

Uses the loudnorm filter. Video stream is copied without re-encoding.

Denoise (hqdn3d)

Applies spatial + temporal noise reduction via hqdn3d. Higher strength = smoother but softer image.

Boomerang

Plays the clip forward then immediately in reverse — classic boomerang loop. Trim is respected. Audio is removed from the output.

Sharpen / Blur

Sharpen uses unsharp; blur uses boxblur. Audio is copied.