How It Works Under the Hood
Executes a single-threaded WebAssembly build of FFmpeg inside your browser memory. Video frames and audio streams are transcoded using your local computer CPU and RAM, bypassing remote cloud queues, bandwidth throttles, and privacy risks.
Step-by-Step Instructions
Drop your video file (MP4, WebM, MOV, MKV, AVI) into the stage.
Select your desired operation: Smart Compressor, Format Converter, Extract MP3, or Mute Video.
Choose your compression intensity (-30%, -50%, -70%, or Discord 25MB Cap).
Click Start and monitor the real-time frame progress bar and ETA countdown.
Preview the compressed result directly in the player and click Download.
Key Features & Performance
- 100% Zero-Cloud Privacy: Videos are never uploaded or logged on any external server
- Real-Time ETA & Hardware Adaption: Automatically adjusts presets based on your client CPU cores
- Discord & Email 25MB Cap: Automatically calculates exact bitrate to stay under file-sharing limits
- Multi-Format Toolkit: Compress, convert to WebM/GIF, extract MP3 audio, or remove audio tracks
Local Browser Processing & Privacy
Traditional web converters upload your documents, snippets, or media files to remote servers. In-Browser Video Compressor & Converter runs inside your browser tab:
Your input text and files are processed locally without uploading payloads to a processing server.
Microdeck does not log or store the files or inputs you paste into tool workspaces (normal static hosting/CDN requests still load page assets).
Working outputs stay in your browser tab and are released when you reset the tool or close the tab.
Frequently Asked Questions
Does this tool upload my video file to a remote server?
NO! Unlike CloudConvert or FreeConvert which upload your private clips to cloud servers, Microdeck executes the entire conversion locally inside your browser using WebAssembly. No bytes leave your device.
How large of a video file can I compress?
Because processing occurs in your local device RAM, you can compress files up to 1GB - 2GB on computers with 8GB+ RAM. For mobile devices, we recommend videos under 200MB.
Why is this tool free with no daily limits?
Traditional video converters charge monthly subscriptions because running video servers is expensive. Microdeck offloads computation to your browser hardware, costing zero server bandwidth, allowing us to keep it completely free and unlimited forever.