Does trimy upload my video?

No. The source file stays on your device. The app may download runtime components to your browser, but the video itself is not uploaded.

When should I use Lossless vs Precise vs Re-encode?

Use Lossless for the fastest cut when it is available. Use Precise or Re-encode when you need exact frames or the source does not fit the lossless path.

Why does Lossless sometimes start a bit earlier or later?

Lossless cuts follow keyframes in the source. If the exact in-point falls between keyframes, switch to Precise or Re-encode.

Can trimy trim very large videos?

Yes. trimy supports multi-GB sources. Very large MKV files can use the FFmpeg WORKERFS path so the whole file does not need to be loaded into memory.

Which browsers work best?

Recent Chrome, Firefox, and Safari builds work best. Up-to-date versions give the most reliable codec and WebCodecs support.

How to Trim Video Without Quality Loss

Use Lossless when you want the fastest cut. Switch to Precise or Re-encode when you need frame-perfect results.

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What this guide helps you do

Fast cuts when Lossless works

When possible, trimy stream-copies your video so quality stays identical and exports finish quickly.

Your file stays local

Your file never gets uploaded. Processing happens locally in your browser.

Works on large files

Built for large videos. Very large MKV files (>2 GiB) are handled differently so they stay workable in the browser.

Steps

Load your video

Drag in a file or click to open one. It stays on your device.

Open trimy and add your file. It supports common containers like MP4, MOV, MKV, AVI, and WebM.

Drop a file anywhere on the page or click the file area
Large videos are supported (processing depends on your device)
Your file is processed locally — no uploads required

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FAQ

Start in trimy

Trim a clip in minutes, with lossless export when it is available and no uploads.

Open trimy