Video Compressor
Compress MP4, WebM, and MOV videos for Discord, email, and web with custom size targets.
Click to select or drag & drop video
Supports MP4, WebM, MOV, MKV, AVI. 100% private in-browser GPU compression with zero server uploads.
How to use Video Compressor
- 1Upload any MP4, WebM, MOV, or MKV video file.
- 2Choose a preset like Discord (<25MB), Email (<15MB), or specify a custom target file size in MB.
- 3Adjust the resolution scale (1080p, 720p, 480p) to match your desired visual quality.
- 4Click 'Start Compression' to encode in-browser using hardware-accelerated GPU pipelines.
- 5Preview the compressed output and download your optimized video with one click.
Key Features & Highlights
- •Hardware-Accelerated In-Browser Encoding: Utilizes browser GPU pipelines for fast client-side transcoding.
- •Discord, WhatsApp & Email Presets: One-click targets to meet upload limits without guessing bitrates.
- •100% Private & Client-Side: Video files never leave your device or upload to any third-party server.
- •Audio Synchronization: Automatically preserves and synchronizes original stereo audio streams.
- •Custom MB Target: Enter exact target sizes (e.g. 8 MB) with automatic bitrate adaptation.
Understanding Video Compressor
Frequently Asked Questions
How does the video compressor reduce file size without losing visual clarity?
The compressor balances video bitrate, frame dimensions, and efficient codec parameters. By eliminating redundant bitrate bloat and applying intelligent resolution scaling (such as downscaling 4K to crisp 1080p or 720p), video files can be reduced by 50% to 80% while retaining sharp perceptual clarity.
What are the video upload file size limits for Discord, WhatsApp, and Gmail?
Free Discord users can upload files up to 25MB (Discord Nitro supports up to 500MB). WhatsApp limits video sharing to 16MB (or up to 2GB when sent as a document). Gmail and most email providers cap attachments at 25MB. Selecting our presets guarantees your video fits under these platform thresholds.
Are my private videos uploaded to an external server?
No. All video decoding, compression, and encoding run entirely inside your local web browser using HTML5 Canvas and native MediaRecorder APIs. Your media never leaves your computer or phone.
Should I compress by lowering bitrate or reducing resolution?
A combination of both yields the best results. For viewing on mobile devices, scaling a 1080p video to 720p reduces file size by nearly 50% with almost no noticeable difference on phone screens, while allowing a higher bitrate per pixel to eliminate compression artifacting.
Will the audio track be compressed or out of sync?
No. The original stereo audio track is captured directly and remuxed in lockstep with the compressed video stream, preserving crystal-clear audio fidelity and perfect lip-sync throughout playback.
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