The Player & Formats

The player bar is pinned to the bottom of every page and keeps playing while you browse. It is driven by real emulator cores compiled to WebAssembly — the audio never leaves your machine; only the files themselves are streamed from your instance.

Transport controls

Control	What it does
Play / pause	Start or pause the current track
Previous / next	Step through the queue
Seek bar	Click or drag to jump anywhere in the track
Volume	Drag to set the level
Shuffle	Toggle shuffled playback (button lights up when on)

The now-playing area shows the current track with its game and cover art.

System media keys

Trackify registers with the browser's Media Session API: your keyboard's media keys, lock screen, and OS media controls all control playback, and show the current track's title and cover art.

How backends are selected

The player picks a backend by file extension and lazy-loads it: only the format runtime you actually open is fetched and initialized. The first track of a new format takes a moment (WASM download + compilation); after that, tracks of the same format start instantly.

Supported formats

System	Extensions	Backend core
PlayStation · PSF	.psf .minipsf .psf2 .minipsf2 .psflib	Highly Experimental
Super Nintendo · SPC	.spc .rsn	Game Music Emu
NES, MSX & friends	.nsf .bgm .opx .sng .kss	NEZplug++
Nintendo 64 · USF	.usf .miniusf .usflib	LazyUSF2
Chip music logs · VGM	.vgm .vgz .cmf .dro	VGMPlay
PlayStation CD-XA	.xa	Native JS decoder
Streamed audio	.genh .mp3	Native JS decoders

Sidecar files (.psflib, .usflib, and similar resources) are part of the game's file bundle and are resolved automatically when a track needs them — that is why Adding Music asks you to upload whole game folders rather than single files.

N64 tracks are heavy

The N64 core runs without dynamic recompilation and uses more memory than the others. On slower machines, N64 playback may need a moment more to start. See Troubleshooting.