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Self-Hosted File Converter for Images, Video, Audio & More — Transmute
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Transmute is an open-source, self-hosted file converter that handles images, video, audio, data, documents, and more; all on your own hardware.No uploads to third-party servers. No file size limits. No watermarks.
Convert anything, anywhere.
Transmute is an open-source, self-hosted file converter that handles images, video, audio, data, documents, and more; all on your own hardware.No uploads to third-party servers. No file size limits. No watermarks.
See the Self-Hosted File Converter in Action
A clean, modern interface designed for efficiency. Upload, convert, download, that’s it.
Format Support
Supported Conversions
Powered by FFmpeg, Pillow, Pandoc, and more, Transmute converts images, video, documents, fonts, and many other formats.
Your files never leave your machine. Full privacy with zero third-party uploads. Perfect for sensitive documents and proprietary data.
Clean REST API powered by FastAPI. Beautiful web UI for drag-and-drop conversions. Upload a file, pick your format, get your result.
No file size caps, no watermarks, no rate limits, no paid tiers. Convert as much as you need, as often as you need.
Comparison
What Does Transmute Replace?
These are great services, but Transmute gives you a feature rich, self-hosted option with full control over your files, workflows, and deployment.
| Service | No Size Limits | Private | Free API | SSO |
|---|---|---|---|---|
| cloudconvert.com | ||||
| freeconvert.com | ||||
| convertio.co | ||||
| vert.sh | ||||
| convertx.org | ||||
| Transmute |
Rubedo theme
Albedo Light
Think carefully before exposing Transmute to the public internet / WAN. Transmute includes built-in authentication and per-user data isolation, but is designed for trusted networks. If you expose it beyond your LAN, place it behind a reverse proxy with TLS and rate limiting. The maintainers are not responsible for security issues arising from your deployment configuration.
Then open http://localhost:3313 in your browser.
Every conversion available through the UI is also available via a REST API. ReDocly formatted docs are served at /api/docs when the app is running.
Under Active Development
Open Source & Community Driven
Transmute is an MIT-licensed, open-source self-hosted file converter built in the open. Star the repo to stay updated, open an issue to request features, or jump in and contribute code.