Payas Web Kit · Player

Payas Player

A browser-native audio and video player with full playlist management, an audio frequency visualizer, and client-side FFmpeg transcoding for formats your browser can't play natively.

Open Player Docs

id::payas-player · stable

KitPayas Web Kit

PlatformBrowser · Web

Audio10 formats

Video10 formats

TranscodingFFmpeg.wasm · in-browser

VisualizerWeb Audio API

LicenseMIT

Open App

Audio formats

MP3 M4A AAC WAV FLAC OGG OPUS ALAC AIFF WMA

Video formats

MP4 MKV MOV WebM AVI WMV TS 3GP HEVC H264

Transcoding

In-browser

FFmpeg.wasm · lazy-loaded

Playback speeds

0.5× to 2×

features

What Payas Player does

Playlist management

Drag and drop files or use the Open button to add tracks. Each entry shows format badge, name, and probed duration. Click to play immediately.

Audio visualizer

Real-time FFT frequency analysis rendered on a canvas using the Web Audio API. Lazy-initialized — only active during audio playback.

FFmpeg.wasm transcoding

AVI, WMV, and other unsupported formats are transcoded to MP4 in-browser. FFmpeg is lazy-loaded on demand, keeping startup time low.

Shuffle & repeat

Toggle shuffle for random playback order, or cycle through repeat modes: Off → Repeat One → Repeat All. Keyboard shortcuts for everything.

20 media formats

MP3, M4A, AAC, WAV, FLAC, OGG, OPUS, ALAC, AIFF, WMA for audio; MP4, MKV, MOV, WebM, AVI, WMV, TS, 3GP, HEVC, H264 for video.

Privacy first

Files never leave your device. No upload, no cloud. localStorage stores only volume and theme preferences. The playlist resets each session.

technical · details

Technical details

Entry point	`payas-player.html` — single HTML file
Stack	HTML5 · CSS3 · Vanilla JavaScript ES2022
Dependencies	Bootstrap 5.3.3 · Font Awesome 6.5.2 · FFmpeg.wasm 0.11.6 · Google Fonts
Storage	`localStorage` — theme and volume. Playlist not persisted.
Audio formats	MP3 · M4A · AAC · WAV · FLAC · OGG · OPUS · ALAC · AIFF · WMA
Video formats	MP4 · MKV · MOV · WebM · AVI · WMV · TS · 3GP · HEVC · H264
Transcoding	AVI · WMV → MP4 via FFmpeg.wasm (lazy-loaded from CDN on demand)
Visualizer	Web Audio API AnalyserNode · HTML5 Canvas · real-time FFT
Developer	Saman Wijesinghe
License	MIT