Subtitle Sync
Shifts or stretches subtitle timings by a fixed offset or by matching two reference points.
Drop a subtitle file to retime
Shift every cue by a fixed amount, or pin two reference lines to fix the steady drift of a frame-rate mismatch. The format and styling stay as they are.
Everything happens in this tab. Nothing is uploaded.
Feed it from
Burn Subtitles
Renders an SRT, VTT, ASS or SMI file permanently into the video frames with size, position, colour and outline control, drawn with the browser’s own fonts so Korean needs nothing extra.
Subtitle Converter
Converts between SRT, VTT, ASS, SMI and plain text, fixing the encoding along the way.
Video Editor
Assembles clips into a YouTube or Shorts upload in the browser: trim, order, transitions, a music bed and subtitles. Same-batch AI clips with hard cuts export losslessly without re-encoding.
Video Trimmer
Cuts a clip between two timestamps, copying streams without re-encoding when the cut is on a keyframe.
Next
These accept what this tool produces, so the result can go straight in.
Burn Subtitles
Renders an SRT, VTT, ASS or SMI file permanently into the video frames with size, position, colour and outline control, drawn with the browser’s own fonts so Korean needs nothing extra.
Subtitle Converter
Converts between SRT, VTT, ASS, SMI and plain text, fixing the encoding along the way.
Audio Converter
Converts between MP3, WAV, FLAC, AAC, OGG and Opus with bitrate and sample-rate settings.
Extract Audio from Video
Pulls the audio track out of a video as MP3, WAV, M4A or FLAC, or copies it without re-encoding.
Audio Trimmer
Cuts a section out of an audio file on the waveform, with fade in and fade out.
Video Compressor
Re-encodes to a target file size or a quality preset, stepping the resolution down when the bitrate would starve it, and shows the projected size before it starts and the actual size after.