Common ways to use this tool

Lossless video trimmer with no upload

Cut supported files locally with packet-copy or stream-copy paths when the edit allows it.

Join videos without re-encoding

Combine compatible clips without decoding and rendering the complete timeline again.

Merge MP4 without re-encoding

Use stream-copy assembly for matching MP4 clips and encode only incompatible sections when needed.

Large video trimmer with no upload

Work with large local media files without first transferring them to a remote editing service.

trimy

trimy is a local browser video editor for trimming, joining, crop, rotation, text, and timeline arrangement. It supports video and audio tracks, can detach or add audio, and keeps exports efficient by using stream copy when possible. Compatible clips can join without re-encoding, while visual edits and incompatible timeline sections use local re-encode paths.

Why it is different

Timeline workflow with both video and audio tracks.

Can join compatible clips without re-encoding through stream-copy paths.

Can partially re-encode mixed sequences instead of always rendering the full timeline.

Includes brightness, black and white, border, caption, and quick per-clip rotation controls.

Applies captions across the complete joined output while rotation follows the clip under the playhead.

Can explicitly convert H.264 to H.265 or H.265 to H.264 while keeping source-driven dimensions and frame rate.

Can switch between lossless, precise, mixed, and re-encode export strategies.

Designed to handle larger local media files than a typical lightweight browser trimmer.

FAQ

Can trimy cut without re-encoding?

In supported scenarios, yes. trimy can use lossless, packet-copy, or stream-copy export paths where the source and operation allow it.

Can trimy join videos without re-encoding?

Yes, when the clips are compatible. trimy can stream-copy matching clips into one joined file instead of decoding and re-encoding the video.

What happens when only one clip in a sequence does not match?

trimy can use a mixed copy-normalize path: matching segments stay stream-copy, while only incompatible clips, timeline gaps, or audio that needs normalization are encoded before the final join.

Can I add external audio?

Yes. You can detach, preserve, replace, or add audio on the timeline.

Does it only trim single clips?

No. It also supports crop, join, clip ordering, frame adjustments, text, rotation, and more complete timeline editing flows.

How do image tools work in a joined timeline?

Text, brightness, black and white, and borders apply across the complete joined output. The quick rotate buttons affect the video clip under the current playhead and visual edits require re-encoding.

Can trimy convert H.264 and H.265?

Yes. Match source keeps the copy-first behavior, while explicit H.264 or H.265 forces a local re-encode using analyzed resolution, frame rate, and source-driven bitrate settings.