Video Editor

Tool Guide

Introduction

The Video Editor is a free online video editing tool that combines multiple editing operations in one page. Powered by FFmpeg.wasm, all processing happens locally in your browser—your video files are never uploaded to a server. Supports trimming, cropping, rotation, flipping, speed adjustment, resolution scaling, and volume control, with the ability to combine multiple operations in a single edit.

Core Features

1. Video Trim: Use time sliders to set start and end points for precise video cutting.
2. Crop: Custom crop area (X/Y coordinates, width/height) to remove unwanted parts.
3. Rotate: 90° clockwise, 180°, and 90° counterclockwise rotation.
4. Flip: Horizontal and vertical flip.
5. Speed Adjustment: 0.25x to 4x speed change with synchronized audio pitch correction.
6. Resolution Scaling: Preset resolutions (1080p/720p/480p) or custom width/height with aspect ratio preservation.
7. Volume Control: 0-300% volume adjustment with one-click mute option.
8. Multiple Output Formats: MP4, Web M, MOV, AVI, MKV, FLV, 3GP, WMV.
9. Combined Editing: Enable multiple features at once—trim + crop + rotate + speed in a single pass.
10. Pure Browser Processing: FFmpeg.wasm processes everything locally, no server upload.

How to Use

Step 1: Click the upload area or drag a video file. Supports MP4, Web M, MOV, AVI, MKV, etc.

Step 2: Check the editing features you want to enable below the video preview.

Step 3: Adjust each feature's parameters (trim time, crop area, rotation, speed, resolution, volume).

Step 4: Select output format (default MP4).

Step 5: Click "Start Edit" and wait for processing, then click "Download Video".

Use Cases

FAQ

Q: Does the Video Editor upload my video to a server?

A: No. All editing is done locally in your browser using FFmpeg.wasm. Your video files never leave your device.

Q: Can I use multiple editing features at once?

A: Yes. Enable multiple features and they will be combined in a single processing pass. For example: trim + rotate + speed simultaneously.

Q: Why is there a loading wait on first use?

A: The first use requires downloading the FFmpeg.wasm engine (~30MB). Once loaded, subsequent edits don't need to re-download.

Q: Will audio pitch change with speed adjustment?

A: No. Speed adjustment uses both setpts and atempo filters to maintain original pitch.

Q: What output formats are supported?

A: MP4, Web M, MOV, AVI, MKV, FLV, 3GP, WMV—8 formats total.