Audio and video workflows

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Audio editing, video conversion and subtitles

Convert supported audio files to MP3 or WAV.

Adjust sample rate/channels and find an MP3 bitrate that meets a file-size limit.

Select a range on a waveform or enter start/end times, preview it and export.

Join audio files in a selected order with configurable gaps.

Apply peak/RMS normalization or gain in dB, with clipping counts.

Apply linear fades to the beginning and end of audio.

Change tempo and pitch independently and export the processed audio.

Extract left/right channels or convert mono/stereo.

List quiet intervals using a threshold and minimum duration, then optionally remove them.

Inspect, edit or clear audio titles, artists, albums and cover art.

Convert primary video/audio tracks from supported containers to MP4 or WebM.

Allocate video bitrate from duration/audio needs and check the actual output size.

Convert sequentially, skip the current file when needed, and save outputs with failed/skipped-file reports in a ZIP.

Join matching short clips in order with aligned audio timelines.

Place a selected audio range at a chosen time and volume, replacing or mixing the original sound.

Crop the actual pixels to centered 9:16, 1:1, 16:9 or a custom rectangle.

Capture PNG frames by count or interval, with an optional contact sheet.

Convert animated GIF frames and timing into a video.

Validate subtitle times, reorder cue numbers and export SRT or WebVTT.

Shift or scale cue times, split subtitle files or burn captions into video.