System Info

Device capabilities: codec support, browser APIs, and hardware resources relevant to file conversion.

Hardware

CPU Cores

2 logical cores

RAM (reported)

Not available

Performance Tier

low

WebGPU

Unsupported

Note: navigator.deviceMemory is capped at 8 GB by the browser spec to prevent fingerprinting. A value of 8 means ≥8 GB — your actual RAM may be 16, 32, or 64 GB.

Browser

Detecting…

User Agent

…

WebAssembly

Unsupported

WASM ThreadsNeeds SharedArrayBuffer + COOP/COEP

Unsupported

WASM SIMDVectorised operations

Unsupported

BigInt

Unsupported

FFmpeg WASM currently runs single-threaded. WASM SIMD improves encoding speed ~1.5–2×. WASM Threads requires cross-origin isolation (COOP + COEP headers) — enabled on this app. A multi-threaded FFmpeg WASM build is not yet shipped, so Threads shows the platform capability, not active usage.

Storage APIs

Detecting…

Browser APIs

Detecting…

Video Codec Playback

Detecting…

AV1 playback support is used for the browser-based AV1 fallback decoder. If AV1 is unsupported, conversion of AV1 input files will not work in this browser.

Audio Codec Playback

Detecting…

Recording Codecs (MediaRecorder)

MediaRecorder API not available

MediaRecorder is used when converting AV1 videos via the browser-fallback decoder path. VP9 or VP8 recording support is required for AV1 → other format conversions.

Conversion Performance Estimate

Image / Data conversion

Near-instant

Audio extraction (fast)

~1–5 s per minute of video

Audio re-encoding

~5–30 s per minute

Video re-encoding

~1–10 min per minute (CPU-bound)

AV1 input (browser decode)

Real-time (~1 min decodes in 1 min)

Why is it slow? This converter runs 100% in your browser via WebAssembly (WASM). WASM is ~10–50× slower than native FFmpeg because it runs in a sandboxed single-threaded environment without GPU or SIMD acceleration (unless your browser supports WASM SIMD above).