Transmute is unclaimed —

Transmute

Convert, compress, stay in control.·transmute.sh

Transmute is a free, open-source, self-hosted file converter and compressor for images, video, audio, data, documents, diagrams, fonts, subtitles, and 3D models. It runs on the user's own hardware via Docker, offering a web UI and a REST API with no file size limits, no watermarks, and no third-party uploads. It includes built-in authentication with per-user data isolation, OIDC/SSO login support, and seven built-in UI themes.

What it's for

Convert images between formats (PNG, JPG, WebP, SVG, BMP, HEIC)Convert video between formats (MKV, MP4, MOV, AVI, WebM)Convert audio between formats (MP3, WAV, FLAC, AAC, OGG)Extract audio from videoConvert 3D models (STL, OBJ, PLY, GLB, 3MF, DXF)Convert data files (CSV, JSON, YAML, Parquet)Convert documents (PDF, DOCX, TXT, Markdown, HTML)Convert draw.io diagrams to PNG, SVG, PDFCompress images, PDFs, audio, video, and GIFsDownload and convert a file directly from a URL

Features 18

3D model conversion (STL, OBJ, PLY, GLB, 3MF, DXF)
Audio conversion (MP3, WAV, FLAC, AAC, OGG)
Audio extraction from video
Built-in authentication with per-user data isolation
Convert a file directly from a URL without uploading first
Data conversion (CSV, JSON, YAML)
Diagram conversion (draw.io to PNG, SVG, PDF)
Docker deployment
Document conversion (PDF, DOCX, TXT, Markdown)
File compression (images, PDF, audio, video, GIF)
Image conversion (PNG, JPG, WebP, SVG, BMP)
No file size limits
No watermarks
OIDC/SSO login integration
REST API with Swagger/ReDocly docs
Self-hosted file converter
Seven built-in themes
Video conversion (MKV, MP4, MOV, AVI, WebM)

At a glance

free tieropen sourceself-hostableAPI

TypeWeb app

DeploymentSelf-hosted

PlatformsWeb, Windows, macOS, Linux

Integrations

PandocFFmpegAuthentikPillowAuthelia

Resources

Docs

Pricing

Transmute is entirely free and open-source with no paid tiers or subscription; users self-host it on their own hardware.

Self-hosted (free)Free

Self-hosted deployment via Docker; no paid tiers exist.

No file size limits, no watermarks, no rate limits, no paid tiers