Your files stay on your device

FFmpeg Core Manager

Load, inspect, and reset the FFmpeg compatibility core the audio and video tools plan against. Cores and media files never leave this browser session.
bundledNo fingerprint yet, this core has not been loaded or probed.Reset to bundled

Bundled LGPL core, not built in this deployment (no artifacts shipped); plans that need it refuse by name.
FFmpeg versionunknownReport probednot probedBuild flagsnone recordedThreadingunknown

No capability report yet. A report is parsed the first time a core is loaded; plans that need the compatibility engine refuse with the missing capability until then.

Supply your own FFmpeg WASM build (ffmpeg-core.js + ffmpeg-core.wasm, optional ffmpeg-core.worker.js). Bytes are validated, fingerprinted, and probed in this tab. They stay in memory for the session and are never written anywhere.
Core script (.js, required)WASM binary (.wasm, required)Worker script (.js, optional)

accepted sizes: script 64 KB - 8 MiB , WASM 4 MiB - 96 MiB , worker 256 B - 2 MiB
Validate, probe, and activate

Point at a core you host or trust. The pin is mandatory: the fetch is a disclosed browser egress to the URL you name, and the bytes load only when their SHA-256 matches the pin. Otherwise the fetch aborts unopened.
Base URL (directory holding the core files)SHA-256 of the WASM binary (64 hex characters)Fetch, verify, and activate

Next door in Media engine

- Convert Videos (/videos/convert)
- Convert Audio (/audios/convert)
All media engine tools (/media)

Canonical HTML: https://nutter.tools/media/core
Markdown version: https://nutter.tools/media/core/index.md
Plain-text version: https://nutter.tools/media/core/index.txt
Agent index: https://nutter.tools/llms.txt