Video Editor

The editor accepts all formats that your browser can play natively, including MP4, WebM, OGG, MOV, and AVI. The most compatible format is MP4 with H.264 codec, which works in all modern browsers without any issues. Processed videos are exported in WebM format, which offers good compression quality and is supported on most platforms and devices. If you encounter problems with a specific format, try converting it to MP4 first using another converter tool.

Video processing is computationally intensive work that requires significant CPU power. The editor processes each frame individually using the Canvas API, then re-encodes everything using the MediaRecorder API. For a 1-minute video at 30fps, that means processing 1,800 individual frames. Performance depends on your processor speed and available RAM. For optimal results, work with shorter clips (under 2 minutes) or lower resolutions (720p or less) when possible.

No! This is one of the most important features of our editor and a key privacy advantage. All processing takes place 100% locally in your browser. Your video files never leave your device and are not transmitted to any server whatsoever. This guarantees complete privacy, regardless of your video content. It's perfect for personal, confidential, or copyright-sensitive materials that you don't want to upload to third-party cloud services.

Due to technical limitations of the Canvas capture method used by browsers, audio is not preserved in most processing operations. This is a restriction imposed by how browsers handle video capture through Canvas and MediaRecorder APIs. For videos that require sound, we recommend using the "Extract Audio" feature to save the audio track separately, then combine audio and video using desktop software like Shotcut, DaVinci Resolve, or OpenShot (all free) for final output.

There is no strict limit imposed by the editor itself, but very large videos (over 500MB) can cause performance issues, browser slowdowns, or even crashes. We recommend working with files under 100MB and durations under 5 minutes for the optimal editing experience. If you need to edit longer or larger videos, consider splitting them into smaller segments first, or use dedicated desktop software that can better handle large files with hardware acceleration.

Technically, the editor works on mobile devices, but the experience is not optimal for several reasons. Video processing requires significant computational resources that phones and tablets offer in limited capacity compared to desktop computers. Simple operations like trim or frame extraction should work, but effects and filters may be very slow or cause browser crashes. For mobile video editing, we recommend native apps like CapCut, InShot, iMovie, or KineMaster which are optimized for mobile hardware.

Google Chrome and Microsoft Edge offer the best performance for video processing due to their optimizations for Canvas and MediaRecorder APIs. Firefox works well but may be slightly slower in some operations. Safari on macOS has limited support for certain MediaRecorder functionalities and may produce inconsistent results. Make sure you're using the latest version of your browser for best compatibility, performance, and security. Close other tabs to free up RAM for processing.

In the current version, each effect must be applied separately as individual processing operations. To combine multiple effects, process the video with the first effect, download the result, then upload it again and apply the second effect. This approach provides more control and allows verification of each modification before continuing to the next one. We're working on a future version that will allow stacking multiple effects in a single processing pipeline for more efficient workflows.