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.

Active core

bundledNo fingerprint yet, this core has not been loaded or probed.

Bundled LGPL core, not built in this deployment (no artifacts shipped); plans that need it refuse by name.

FFmpeg version: unknown
Report probed: not probed
Build flags: none recorded
Threading: unknown

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.

Load a core. Upload bytes

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

Load a core, remote URL + pinned SHA-256

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)

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FFmpeg Core Manager

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