Video Splitter
What is Video Splitter ?
AI Toolbox is a browser-based, free online video splitting tool that supports mainstream formats including MP4, WebM, MOV, MKV, and AVI. It requires no file uploads, no registration, and adds no watermarks. All processing is performed locally using FFmpeg compiled via WebAssembly, ensuring 100% privacy and security. It offers four splitting methods: manual precise splitting with timeline preview, equal portion splitting, duration-based splitting, and file size-based splitting. It also supports Fast Mode for stream copying (ultra-fast splitting) and advanced re-encoding mode, meeting diverse editing needs from social media shorts to 4K high-definition footage.
- Recording time：2026-07-05
- Is it free：
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(2026-05-01 - 2026-05-31)Website Latest Traffic Status
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Video Splitter Core Features
Local Privacy Video Splitting — Browser-side FFmpeg processing based on WebAssembly ensures files never leave your device. Zero uploads and zero server logs make it ideal for confidential and personal videos.
Four Smart Splitting Modes — Supports manual timestamp precise splitting with waveform/thumbnail preview, equal uniform splitting, fixed-duration batch splitting, and target file size splitting.
Fast Mode Ultra-Fast Stream Copying — When enabled, the original streams are copied directly without re-encoding for second-level splitting speeds, perfect for large files. Disabling it enables frame-level precise cutting.
Multi-Format Output and Quality Control — Supports container switching among MP4/WebM/MOV/MKV/AVI, offering High/Medium/Low three-tier quality re-encoding options to flexibly adapt to different platform upload requirements.
Cross-Platform Compatibility with Offline Support — Compatible with both desktop and mobile devices. Chrome, Edge, Brave, and other Chromium-based browsers are recommended. All data is cleared immediately upon closing the tab.
Video Splitter Subscription Plan
FAQ from Video Splitter
Is AI Toolbox video splitting tool safe? Are files uploaded to servers?
Absolutely safe. AI Toolbox uses a 100% local processing architecture where all operations are completed via FFmpeg compiled in the browser using WebAssembly. Files never leave your device; there are no upload queues, cloud processing, or server logs. All data is cleared immediately when you close the browser tab, making it perfect for handling confidential videos, personal privacy materials, or copyrighted content.
Which video formats are supported? Can it split 4K HD videos?
AI Toolbox supports MP4, WebM, MOV, MKV, AVI, FLV, 3GP, MPG, WMV, and other mainstream formats. For 4K and high-resolution videos, we recommend using Chromium-based browsers like Chrome or Edge for optimal performance. Fast Mode allows quick processing of large files, while disabling it enables advanced re-encoding mode for frame-level precise cutting.
What is the difference between Fast Mode and Advanced Mode?
Fast Mode (Stream Copy Mode) directly copies the original audio and video streams without re-encoding, achieving second-level splitting speeds. However, cut points automatically align to the nearest keyframe (typically within a 1-second deviation). Advanced Mode performs full re-encoding, allowing custom output formats (MP4/WebM/MOV/MKV/AVI, etc.) and High/Medium/Low quality selection, enabling frame-level precise cutting, though it takes longer to process.
How do I split videos by fixed duration or equal portions?
In Equal Portions mode, simply enter the target number of segments (e.g., 4), and the tool will automatically divide the video evenly, ideal for course chapters or long video segmentation. In Fixed Duration mode, set the length per segment (e.g., 30 seconds), and the tool will slice the video at fixed intervals; the last segment will retain its original length if it's shorter than the set duration. Both modes support Fast Mode for ultra-fast processing.
Can I split videos by file size? Is it suitable for social media uploads?
Yes. In File Size Splitting mode, you can specify the target MB size per segment. Fast Mode estimates bitrates and adjusts timestamps accordingly, while Advanced Mode precisely controls file sizes through re-encoding. This feature is particularly suitable for platforms like Instagram, TikTok, YouTube Shorts, WeChat, etc., that have file size limits, eliminating concerns about upload failures.
Will the video lose quality or audio after splitting?
In Fast Mode, original video quality and audio are fully preserved as it only copies streams without re-encoding. In Advanced Mode, you can select High quality output where visual loss is imperceptible to the naked eye. Audio tracks are fully retained, supporting multi-track videos; soft subtitles are usually preserved, while hard-coded subtitles are split along with the video frames.
Can I use it on mobile devices? Does it support iPhone and Android?
Yes. The Android version of Chrome can handle most video files. Due to WebAssembly performance limitations, iOS Safari is best used for smaller files or consider using a desktop device. For the best experience, we recommend Chromium-based browsers like Chrome, Edge, or Brave. All processing remains local, so mobile users enjoy the same zero-upload privacy protection.
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