Video Trimmer

Trim and cut video files with preview, setting precise start and end points.

Tested tool guide Tested browser tools Checked August 16, 2026

What Video Trimmer does, with a checked example

Video files record more than you usually want to keep. This page plays the file you choose and lets you set a start point and an end point, then delivers a new file containing only the segment between them. The preview doubles as a compatibility check: a file that plays in the preview can be trimmed, while one the browser cannot decode will not process. The result is a freshly encoded clip, not a byte-level slice of the original, so quality, bitrate, and metadata can differ from the source. Expect to re-check the first and last frames of what you get.

Worked example

A concrete input and expected output from the current implementation.

Input

Start: 00:12, End: 00:47, on a 2-minute clip

Expected output

A new video file holding the segment from the 12-second mark to the 47-second mark - 35 seconds of the original, ready to download.

The length of the kept segment is the difference between the two points: 47.0 - 12.0 = 35.0 seconds. The tool keeps the frames between the points you set, so the start and end you choose are exactly the span you get.

How the result is produced

Setting the cut points

After you load a file, the preview shows the video and lets you scrub to any moment. You mark a start point and an end point; the tool keeps the frames whose timestamps fall between them, so the delivered span is end minus start. Points are usually entered as seconds or hh:mm:ss, and you can adjust them while watching the preview.

Producing the output file

The kept frames are written into a brand-new video file with a fresh encode. The output container and codec are whatever the tool and the browser can produce, which may differ from the source file's, and quality and bitrate follow the tool's settings rather than the original's. Everything happens locally on your machine; the result arrives as a download and the source file is never modified.

Good uses

Cutting the dead minutes off a screen recording or a webcam talk so only the part you mean to send survives.
Isolating one short moment - a goal, a glitch, a quote - from a long video for a reply, an archive, or a report.
Bringing a video under a site's size or duration limit - an email attachment, a messenger, a channel cap - without re-recording it.

Limits and checks

The output is a new encode, not the original bytes with frames removed. File size, bitrate, and quality can all differ from the source; keep the original file if you might need the master again.
Cut points land on the video's frame grid. A time you set between two frames snaps to the nearest frame, so watch the first and last frames of the result before trusting exact cut positions.
Only formats the browser can decode will process. A file that will not play in the preview will not trim, and the output's container or codec may not match the input's, so test the result where you intend to use it.

Common questions

Will the trimmed file look exactly like the original?

Not necessarily. The clip is re-encoded, so the output follows the tool's and the browser's encoding choices rather than the source's. Loss is usually small on well-encoded sources but most visible on low-bitrate or high-motion material. Keep the original; it costs nothing and covers you.

Does trimming delete or modify my original video?

No. The source file stays exactly as it was; the trim is written to a separate file that you download. If the result is not right, set new points and run the trim again - or fall back to the original and start over.

References and verification

The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.