Trim a video without uploading it

How to trim a video in 3 steps

1. Turn on Cut mode. Open your video above. It starts playing. Open the ⋯ menu at the top right and choose Cut mode. A timeline with editing buttons appears under the video.
2. Mark the part. Move to where the unwanted part starts and press Start cut (or the I key). Move to where it ends and press End cut (O). The part turns pink on the timeline. Use Frame back and Frame forward (, and .) to land exactly where you want. Mark as many parts as you like; overlapping parts are merged.
3. Save. Click Save without marked parts to get the video with those parts removed, or Save marked parts only to keep just them as a clip. The new file is named after the original with _trimmed or _clip added, and your original is never overwritten.

When it's done, the status line tells you what was saved and how long it is, for example "Saved holiday_trimmed.mp4: the video without the marked part, 00:12:40 long (original 00:14:05)." Your cut marks are kept on this device, so you can come back to the same file and adjust them.

Lossless: what that means here

Most online trimmers decode your whole video and compress it again. That takes a long time and every pass loses some quality. Here, the video and audio are copied exactly as they are in your file. The parts you keep are the same bits as the original.

There is one catch with copying: a video file is built from keyframes (full pictures) and the frames in between, which only store what changed. A copy can only start cleanly on a keyframe, and keyframes can be several seconds apart. To still cut on the exact frame you picked, the player re-encodes just the few frames from your cut point to the next keyframe, then copies the rest. The in-app note says it plainly: "The video is copied as-is; only the few frames after each boundary are re-encoded, so cuts land on the exact frame."

Re-encoding uses your browser's built-in video encoder. If your browser can't encode that video codec, the part starts at the next keyframe instead, so it begins a little later than you marked, never earlier, and a removed part never comes back. You're told when that happens, with a message like: "This browser can't re-encode this video, so a part starts at the next keyframe: 00:00:05 now starts at 00:00:08."

Compared with upload-based trimmers

Other tools' limits are as published by each site and summarized by Softpicker (checked October 2026). See Kapwing and Clideo for their current terms. Uploading also means waiting for the whole file to transfer before you can start, and again to download the result.

Browser notes for large files

Chrome and Edge show a save dialog first. The trimmed video is then written straight to the file you chose, piece by piece, so even very large videos don't have to fit in memory.

Firefox, Safari and other browsers don't offer that dialog, so the result is built inside the browser and then downloaded. That works up to about 2 GB, less on a device that reports little memory. If the export would be bigger, nothing starts and you see: "This export is about 2.4 GB. This browser can't save files that large here — use Chrome or Edge, or save a shorter part."

You can cancel a save at any time. Want to watch the video instead? Simple Video Player also lets you play MKV files with supported audio, and it's a video player that needs nothing installed.

Frequently asked questions

Is there a watermark?

No. The saved file contains only your video. Nothing is added to the picture, the start or the end.

Is there a file size limit?

Not in Chrome or Edge: they let the page write the result straight to a file on your disk. Other browsers, such as Firefox and Safari, have to build the file inside the browser first, which works up to about 2 GB (less on devices with little memory). If an export is too large, you're told before it starts.

Does it re-encode or lose quality?

The video and audio are copied as they are, so quality doesn't change. Only the few frames right after each cut point are re-encoded, so that the cut lands on the exact frame you chose.

Why does a part start a little later than I marked?

Normally it doesn't. But if your browser can't re-encode the video's codec, the part has to start at the next keyframe instead, which can be a second or more later. The status line then says which part moved and where it now starts. A part you removed never comes back.

Which formats?

MP4, MOV, WebM and MKV. The result is saved in the same format as the original.