Video Trimmer

Drop your video here or click to browse

Supports MP4, WebM, MKV, MOV up to 500MB

How to Trim a Video Online Without Uploading

Load your video file

Drag and drop your video onto the trimmer or click the upload area to browse your files. The video loads directly into your browser memory without being sent to any server. MP4, WebM, MKV, and MOV files are all supported.
Set your start and end points

Use the timeline scrubber to position the start and end markers at the exact timestamps you want. You can also type precise times manually for frame-accurate control. The duration indicator updates in real time as you adjust.
Preview the trimmed clip

Click Preview Trim to watch only the selected portion of your video before committing. This lets you verify you have exactly the right segment without waiting for the full processing step.
Trim and download

Hit Trim Video to start processing. The trimmer copies the packets between your two markers with WebCodecs through the Mediabunny library, and re-records the clip through the browser's MediaRecorder when the output container differs from the input. When finished, click Download to save the trimmed clip. The original file is never modified.

Common Use Cases

Social media clips

Extract the best 15-60 second moments from longer recordings for Instagram Reels, TikTok, or YouTube Shorts. No need to install editing software just to grab a quick clip.

Screen recording cleanup

Remove the setup time at the beginning and the fumbling at the end of screen recordings. Ship clean tutorials and demos without exposing your desktop or unrelated tabs.

Presentation segments

Pull specific segments from recorded meetings, webinars, or lectures. Share only the relevant 5-minute section instead of asking colleagues to scrub through an hour-long video.

Removing intros and outros

Strip unwanted intro sequences, sponsor segments, or trailing silence from downloaded videos before archiving or re-sharing. Keeps your media library lean and focused.

Why use our Video Trimmer?

Our video trimmer is the perfect tool for quickly cutting unwanted sections from your videos. Whether you need to remove an intro, trim the ending, or extract a specific clip, our browser-based tool makes it simple and fast. Unlike other online tools, your video never leaves your device. All processing happens locally in your browser: the trimmer reads your file with WebCodecs through the Mediabunny library, and falls back to canvas and the browser's MediaRecorder when the output container differs from the input. On the fast path it copies packets instead of re-encoding, so the trim finishes in seconds with no upload or download wait. The tool supports popular video formats including MP4, WebM, and MKV, and can export to either MP4 or WebM format. The intuitive timeline interface lets you precisely select your trim points with frame-accurate control.

This video trimmer runs entirely in your browser on WebCodecs, the browser's own media pipeline, driven by the Mediabunny library. When you load a video, the file stays on your device. There is no upload step, no cloud processing, and no server that ever sees your footage. This matters for anyone working with private screen recordings, unreleased content, or videos that contain sensitive information. Processing speed depends on your hardware rather than your internet connection, which often makes local trimming faster than cloud-based alternatives.

The tool supports all major container formats including MP4 (H.264/H.265), WebM (VP8/VP9), MKV, and MOV. When the input and output formats match, the trimmer uses transmuxing to copy video and audio streams directly without re-encoding. This preserves the original bitrate, resolution, and quality exactly. Re-encoding only occurs when you convert between containers, and that fallback path re-records the clip through the browser's MediaRecorder in real time, so it takes about as long as the clip plays.

After trimming, you can continue editing your clip with other browser-based tools. Convert the result to an animated GIF with the Video to GIF converter, reduce file size with the Video Compressor, change dimensions using the Video Resizer, or extract the audio track with the Video to Audio extractor. Every tool in this pipeline processes locally with zero uploads.

How it compares

Most online video trimmers such as Kapwing, Clideo, and Adobe Express require you to upload your video to their servers before processing begins. This introduces three problems: upload time that depends on your internet speed, privacy concerns about your footage sitting on third-party infrastructure, and limitations tied to free-tier accounts. Kapwing adds a watermark on exports and requires a login. Clideo limits output to 500 MB and adds branding. Adobe Express requires an Adobe account and processes everything server-side.

This trimmer takes a fundamentally different approach. Your video never leaves your device. There is no account to create, no watermark on the output, and no cap on how many videos you can trim. Because processing happens through the browser's own WebCodecs pipeline, even users on slow connections get the same performance. The tradeoff is a hard 500 MB cap, since the video is held in browser memory, whereas server-based tools can take bigger files on their infrastructure. For the vast majority of trimming tasks under that cap, the local approach is faster and more private.

Video Trimming Tips

Trim at keyframe boundaries when possible. Cutting at a keyframe avoids re-encoding and preserves full quality. If your cut looks glitchy at the start, try shifting the start point by a fraction of a second.
Use the preview feature before processing. Watching the selected segment first saves time, especially on large files where re-trimming would mean waiting through another processing cycle.
Keep your browser tab in the foreground while trimming. Background tabs may get throttled by your operating system, which slows the browser's media processing significantly.
The trimmer accepts files up to 500 MB and rejects anything larger outright. Close other browser tabs when you work near that cap, because the whole video is held in browser memory while it is processed.
Export to WebM if you need a smaller file, or stick with MP4 for maximum compatibility across devices and platforms. MP4 plays natively on virtually every phone, tablet, and computer.

Frequently Asked Questions

Does this video trimmer require a signup?

No. Our video trimmer is free to use, with no hidden costs, watermarks, or limitations. You can trim as many videos as you want.

Are my videos uploaded to a server?

No, for the video file itself. The trimmer reads it in your browser with WebCodecs through the Mediabunny library and sends it nowhere. The optional From URL box is the one request that leaves: your browser downloads that address directly, so the site you paste sees the request, and the video still goes nowhere else. The page loads ad and analytics scripts as most sites do, and they never see your file.

What video formats are supported?

We support MP4, WebM, MKV, and MOV for input. Output can be saved as MP4 or WebM format.

Is there a file size limit?

Yes. The trimmer accepts files up to 500 MB and rejects anything larger before reading it. The whole video is held in browser memory while it is processed, so close other tabs when you work close to the cap.

Will trimming reduce video quality?

No, not when the containers match. On that fast path the trimmer copies the video data without re-encoding, which preserves the original quality exactly. Re-encoding only happens when you convert between containers, and that fallback re-records the clip in real time.

Can I trim videos on my phone or tablet?

Yes. The trimmer works in any modern mobile browser including Safari on iOS and Chrome on Android. The same 500 MB cap applies, and phones have less RAM than computers, so a file near the cap can run out of memory on a phone that a laptop handles fine.

How is this different from Kapwing or Clideo?

Unlike Kapwing or Clideo, this tool does not upload your video to a server. Processing happens locally in your browser, so there is no watermark, no signup requirement, and no waiting for uploads and downloads. Your footage stays completely private.

What does transmuxing mean?

Transmuxing copies the existing video and audio streams into a new container without re-encoding. This is much faster than re-encoding and preserves 100% of the original quality. It works when the input and output formats use the same codecs.

Can I trim multiple sections from one video?

No, not in one pass. The tool trims a single continuous segment per operation. To extract multiple sections, trim each segment separately and download them individually. You can reload the original video as many times as needed.

Why does processing seem slow on large files?

Trimming runs on your device's CPU and available RAM rather than on a server. Close other tabs to free up resources, and keep the trimmer tab in the foreground since browsers throttle background tabs. The fast path copies packets and finishes in seconds; when the output container differs from the input, the clip is re-recorded in real time and takes about as long as it plays.