PrivateTools

Features

trimy

trimy cuts and joins video in the browser with a copy-first approach. When clips are compatible, it keeps the original encoded packets. When they are not, it tries to encode only the pieces that actually need work.

Open trimyWhat's new

Features

  • Trim and join: Cut one clip, order several clips, or build a simple timeline.
  • Crop: Adjust the visible frame when the export needs different framing.
  • Audio tracks: Keep, detach, replace, or add audio alongside video clips.
  • Audio-only mode: Trim MP3 files or join several MP3 clips without going through the full video editor.
  • Native playback when possible: Use the browser video path for sources it can play reliably.
  • Frame preview fallback: Generate preview frames when native playback is missing, unstable, or not precise enough for editing.
  • Difficult containers: Handle MOV, AVI, MKV, MXF, TS, FLV, and WMV more carefully than a simple HTML video player.
  • Copy-first trim and join: Use packet copy or stream copy when codec, container, and keyframe boundaries make it safe.
  • Partial re-encode: Keep matching segments untouched and encode only incompatible clips, black gaps, or audio that needs normalization.
  • Keyframe-aware cuts: For copy-friendly trims, ranges can be checked or aligned to keyframes instead of forcing an unnecessary encode.
  • Gap rendering: Timeline gaps become real black and silent media segments so players do not collapse them.
  • HEVC copy: Preserve H.265/HEVC by copy when the source and output can be joined safely.
  • HEVC encode paths: Use browser HEVC support when available, with local encoder fallback work such as Kvazaar where supported.
  • Dominant codec: For mixed H.264 and H.265 timelines, target the dominant codec instead of flattening everything to the easiest fallback.
  • Large inputs: Use large-file handling paths for media that should not be fully copied into browser memory at once.

Useful for

  • Trim and join compatible clips without re-encoding.
  • Create frame previews for files the browser cannot play directly.
  • Encode only mismatched clips, timeline gaps, or audio fixes when a mixed sequence allows it.
  • Work with crop, external audio, audio-only MP3 jobs, and large local video files.