Privatemedia
The world's first serverless, privacy-first multimedia suite. Powered by WebAssembly and FFmpeg.wasm. No uploads, no servers, 100% local.
PrivateMedia: The Ultimate Private Media Suite
PrivateMedia is a professional, high-performance media processing ecosystem and a core pillar of the Kopivo Suite. It operates under a strict Zero-Knowledge architecture, bringing the entire FFmpeg processing pipeline — video, audio, and privacy tools — directly into the user's browser via WebAssembly (WASM).
The world's first serverless, privacy-first media suite. Powered by FFmpeg.wasm. No uploads, no servers, 100% private.
🌐 Official Website: media.kopivo.com
🔗 Part of the Kopivo Ecosystem
📑 Table of Contents
- The Problem with Cloud Media Tools
- How PrivateMedia Works (FFmpeg.wasm)
- Available Local Tools
- Tech Stack
- Privacy & Security Protocol
- Future Vision
🚫 The Problem with Cloud Media Tools
Legacy platforms like Clideo, Kapwing, and Adobe Express rely on the same broken "Upload-Process-Download" model. With media files, this becomes even more dangerous:
- Privacy Breaches: Video files contain embedded metadata — GPS coordinates, device identifiers, timestamps — sent directly to third-party servers.
- Prohibitive File Sizes: A 4K video upload can take minutes and consume significant bandwidth, only to be stored on a server you don't control.
- Subscription Paywalls: Server infrastructure costs are passed directly to you via forced subscriptions and file-size limits.
- Data Retention Risk: Many platforms retain your media files long after processing, creating permanent privacy liabilities.
PrivateMedia eliminates the server, eliminating every one of these risks.
⚙️ How PrivateMedia Works (FFmpeg.wasm)
PrivateMedia compiles the full FFmpeg binary to WebAssembly, executing it inside a secure browser sandbox at near-native speed. No plugins. No extensions. No server roundtrips.
- FFmpeg.wasm Engine: The industry-standard multimedia framework, recompiled to run entirely in the browser.
- Edge Computing: Your device's CPU handles all encoding, decoding, and transformation.
- Data Sovereignty: Your video and audio files never leave your RAM. Only static assets (HTML/JS/WASM) are served by our CDN.
- Zero-Footprint: When the tab closes, all traces of your media are automatically wiped from volatile memory.
- Svelte 5 + Runes: The UI is built with Svelte 5's reactivity system (Runes), delivering a fast, lightweight, zero-overhead interface.
🛠️ Available Local Tools — 19 Modules
🎬 Video — 8 modules
| Tool | Description |
|---|---|
| Compress Video | Reduce file size without perceptible quality loss using FFmpeg's CRF encoding. |
| Cut Video | Trim any segment from a video with frame-accurate precision, no re-encoding required. |
| Video to GIF | Convert any video clip to an optimized, looping GIF directly in the browser. |
| Change Resolution | Upscale or downscale to any standard resolution (4K, 1080p, 720p, 480p, etc.). |
| Change Speed | Speed up or slow down video playback from 0.25x to 4x. |
| Mute Video | Strip the audio track from any video file instantly. |
| Repair Video | Attempt to recover and rebuild corrupted or incomplete video containers. |
| Capture Frame | Extract any individual frame from a video and export it as a high-quality image. |
🎵 Audio — 5 modules
| Tool | Description |
|---|---|
| Convert Format | Transcode between MP3, AAC, OGG, FLAC, WAV, and more. |
| Extract Audio | Demux and export the audio track from any video file. |
| Normalize Volume | Automatically balance audio levels to a target loudness (LUFS). |
| Join Audios | Concatenate multiple audio files into a single seamless track. |
| Compress Audio | Reduce audio file size by adjusting bitrate and codec settings. |
🔒 Privacy & Advanced — 6 modules
| Tool | Description |
|---|---|
| Remove Metadata | Strip all embedded metadata (EXIF, GPS, device info) from video and audio files. |
| Add Watermark | Overlay a custom image or text watermark at any position and opacity. |
| Add Subtitles | Burn SRT/VTT subtitle tracks directly into the video stream. |
| Rotate Video | Rotate or flip video orientation without re-encoding the full stream. |
| Thumbnail Mosaic | Generate a visual contact sheet of frames for quick video preview and cataloging. |
| Custom Command | Execute raw FFmpeg commands directly in the browser for advanced users. |
🧰 Tech Stack
| Layer | Technology |
|---|---|
| UI Framework | Svelte 5 (Runes reactivity system) |
| Media Engine | FFmpeg.wasm (FFmpeg compiled to WebAssembly) |
| Runtime | WebAssembly (WASM) in browser sandbox |
| Threading | SharedArrayBuffer + Web Workers (multi-threaded WASM) |
| File I/O | Browser File API + Blob URL download |
| Styling | Scoped Svelte styles + CSS custom properties |
| Distribution | Static CDN — zero backend, zero database |
🛡️ Privacy & Security Protocol
PrivateMedia operates on a No-Log, No-Cloud mandate across all 19 tools:
- Local Intake: Files are accessed exclusively via the browser's native File API. No
<input>data is ever transmitted. - In-Memory Processing: The FFmpeg.wasm module performs all transformations inside a secure, sandboxed Web Worker. The main thread only receives the final output blob.
- Instant Output: The browser triggers a local Blob URL download. No data is ever sent to a backend.
- Metadata Awareness: Unlike cloud tools, PrivateMedia actively surfaces and strips metadata from your files — it never reads it for profiling.
🔗 The Kopivo Ecosystem
PrivateMedia is one pillar of the broader Kopivo privacy-first productivity suite:
| Product | Focus | URL |
|---|---|---|
| Kopivo PDF | PDF management & editing | pdf.kopivo.com |
| Kopivo Media | Video & audio processing | media.kopivo.com |
💬 Support & Contribution
PrivateMedia is built to make the web private again — one file format at a time.
- Star this Repo: Help professionals find a secure alternative to cloud-based media editors.
- Spread the Word: Share with video editors, journalists, lawyers, and anyone handling sensitive media.
- Feedback: Reach out via media.kopivo.com for feature requests or technical inquiries.
Precision. Privacy. Performance. © 2026 Kopivo.
