Private video trimmer # Private Video Trimmer for sensitive footage No uploadFrame-accurate cutsNo metadata leaked Trimming is often the operation where the most sensitive moment of a video is removed: the few seconds someone said something off the record, the bit of background a viewer should not see, the part the client asked to be cut. A cloud trimmer sees both halves of that cut, which is unintuitive but architecturally true. ## Try it now The trim tool runs the same browser-local engine described on this page. [Open the Trim tool](/trim) ## Why this matters A browser-local trimmer sees neither. The source file is read into memory, the cut points are applied through FFmpeg WebAssembly, and the trimmed output is written back to your disk. The frames that get discarded never travel anywhere; they were always only in your laptop's RAM. For investigative work, exit-interview clips, supervisor reviews, and other footage where the trimmed-out portion is the whole point of trimming, browser-local is the only correct shape. ## What you actually get #### Both halves of the cut stay local The discarded section never reaches a server. Neither does the kept section. The trim happens in browser memory entirely. #### Frame-accurate cut points The timeline scrubs at frame precision. Cut points land exactly where you set them, not on the nearest keyframe. #### No filename or metadata logged We have no record that you trimmed file X to remove segment Y. The browser tab's memory is the only place that information ever existed. #### Works for legal-hold and HR workflows When the trim is for compliance, audit, or HR reasons, the architectural property of "no third party in the custody chain" satisfies the standard requirement. ## How to trim a video privately #### 01 Open the Trim tool Visit the page below. The browser caches FFmpeg WebAssembly after the first visit. #### 02 Drop the source video Drag the file in. The browser reads it locally; no upload occurs. #### 03 Mark cut points Scrub the timeline and set in and out points. Multiple cut sections are supported. #### 04 Trim and download Run the trim. The trimmed MP4 is saved to your downloads folder. The discarded segments are not stored anywhere. ## Frequently asked questions ### Why is trim a privacy-sensitive operation? Because the part you trim out is often the most sensitive part of the video. The whole purpose of the cut is to remove something. A cloud trimmer sees what you removed, which is the opposite of the goal. ### Does the tool keep a copy of the original? No. The source file stays where you put it (your disk). The trim produces a new output file, also on your disk. There is no server-side copy of either. ### Can I trim multiple sections out of one video? Yes. The Trim tool supports multiple non-contiguous cut points (jump cuts and inverse trims). Each cut is applied during the same local re-encode. ### How accurate is "frame-accurate" in practice? Cut points land within a single frame of where you set them. The encoder re-encodes a small portion around the cut to make it precise, which avoids the usual one-second snap-to-keyframe limitation. ### What happens to the audio at the cut? The audio is cut at the same point as the video, with a short crossfade by default to avoid clicks. The crossfade can be disabled for hard cuts. Privacy by architecture ## All processing happens locally in your browser, and your files never leave your device. No upload step, no server queue, no waiting. Verify in 30 seconds 1. 01`⌘⌥I` Open DevTools and switch to the Network panel. 2. 02 Filter to fetch and XHR requests. 3. 03 Drop your file in and start the tool. 4. 04 You will see the app bundle, the WASM binary on first visit, and nothing involving your file. How this works Video and audio processing runs through FFmpeg compiled to WebAssembly. Hardware decoding goes through the browser's WebCodecs API. Speech recognition runs against a Whisper model that downloads once and caches in your browser, never streamed from a third-party server. ## Related Tools and Resources #### [Trim Video](/trim) The actual trim tool. #### [Trim, No Upload](/trim-video-no-upload) Same architecture, no-upload framing. #### [Private Video Editor](/private-video-editor) Full timeline editor with the same privacy model. #### [Private Video Compressor](/private-compress) For file-size reduction after trimming. --- Source: [https://vidstudio.app/private-trim](https://vidstudio.app/private-trim)