About Split Ninja
Overview
Split Ninja is a browser-based video cutter and audio extractor built by Rica Media Lab. Dropping a media file reveals its type, duration, size, and format next to a video preview and an editing timeline. Processing runs on the user's machine, so video and audio stay local and never travel to a server.
The tool handles four jobs: slicing clips at custom cut points, exporting one start-to-end range, separating video and audio streams, and detecting scene changes automatically with Smart Scene Slicing. Users pull out an independent audio track in MP3, M4A, or WAV, or keep the picture and drop its audio for a muted export.
Key Benefits
- Keep footage private by cutting video and audio locally in the browser instead of uploading it.
- Slice clips and export a single range with precise start and end points on the timeline.
- Extract independent audio tracks as MP3, M4A, or WAV while leaving the video untouched.
- Export muted video by keeping the picture and removing its audio track.
- Detect scene changes automatically, adjust sensitivity, and add or remove individual cut points.
- Slice several segments at once and download the full batch as a ZIP archive.
How It Works
Users drop a file, check the preview against the type, duration, size, and format readout, then pick Clip, Slice, Separate Range, or Smart Scene Slicing. For scene slicing they set a sensitivity value, run Fast, Standard, or Precise detection, tap a cut point to jump the playhead and confirm it, and move the playhead to add new points. They then choose Fast, Standard, or Precise export, queue each export, and download the results.
Use Cases
- Video editors trim raw footage into clean clips before moving files into an editing suite.
- Podcasters extract audio tracks as MP3, M4A, or WAV for publishing an episode.
- Social media creators cut short clips and mute the source audio before adding their own track.
- Teachers and students slice long lecture recordings into short study segments.
- Music producers pull an isolated audio track from video to sample a section.
- Researchers separate the video and audio streams of interview recordings ahead of transcription.
Why Choose This Product
Split Ninja keeps media on the device, which suits anyone handling confidential or unreleased footage. Three export modes let users trade encoding speed for timing accuracy, and three detection modes let low-end machines process long videos while the precise setting serves final confirmation passes.
Split Ninja Pros & Cons
- Processes video and audio locally in the browser, with no upload step
- Exports audio as MP3, M4A, or WAV and mutes video on demand
- Automatic scene detection with sensitivity control and editable cut points
- Fast, Standard, and Precise options for both detection and export
- Batch export queue with a single ZIP download
- Fast export mode may snap cut points near keyframes
- Precise detection and export modes are slower and more resource intensive
- Fast detection skips in-between frames and may miss very short transitions
Key Features
Clip And Slice
Cut custom clip points on the timeline and jump the playhead by tapping any cut point to check it.
Range Export
Set a start and end point in Separate Range mode to export one continuous section of the source file.
Audio Extraction
Export an independent audio track as MP3, M4A, or WAV while the video stream stays untouched.
Muted Video
Keep the video and remove the audio track to produce a silent clip.
Smart Scene Slicing
Detect visual transitions automatically, set a sensitivity level, and add or remove individual cuts before slicing.
Export Modes
Choose Fast for no re-encoding, Standard for re-encoding only around cut points, or Precise for strict timing.
Detection Modes
Run Fast detection for long videos and low-end devices, Standard for everyday footage, or Precise for finer cuts.
Batch ZIP Download
Slice multiple segments into an export queue and download the whole set as a single ZIP archive.
Local Processing
All media processing happens in the browser, so video and audio files never leave the device.
Media Info Readout
The preview panel reports the file's type, duration, size, and format before editing begins.
Frequently asked questions about Split Ninja
Does Split Ninja upload my video or audio files?
No. The page states that video and audio stay local, and the tool keeps media processing local and private. Files load into the browser preview so you can edit and export without sending them to a server.
What audio formats can I extract?
The audio output selector offers MP3, M4A, and WAV as source codec options for extraction. The Separate mode exports an independent audio track while a separate Muted Video mode keeps the video and removes the audio.
How do I detect scene cuts automatically?
Open Smart Scene Slicing, adjust sensitivity first, then choose Fast, Standard, or Precise detection. Fast suits long videos or limited devices, Standard fits most everyday footage, and Precise adds an extra transition pass for final confirmation. Review the cuts, then slice segments.
What export modes are available?
Fast skips re-encoding for speed and near-lossless output, though cut points may snap near keyframes. Standard re-encodes only the spans around cut points while copying the main body when possible. Precise re-encodes for strict timing, which is slower and more resource intensive.
How do I fine-tune a cut point?
Tap a cut point on the timeline to jump the playhead there and check whether it feels right. To add a cut point, move the playhead to the position you want. To remove one, select that cut point first and then remove it.
Can I export several clips at once?
Yes. Once the cuts look right, slice segments to export continuous clips from the start, the cuts, and the end. Each export joins the export queue, and you can download all of them together as a ZIP archive.