Pure ToolsPure Tools
ToolsSitemapGitHubReport Issue中文

© 2026 Pure Tools. Crafted with precision.

Privacy·

Free Online Audio Format Converter - ATools

Free online audio format converter (MP3/WAV/FLAC/OGG/M4A/OPUS) with bitrate/sample-rate/channels and basic metadata. Runs locally.

View source on GitHub
Free online audio format converter to convert between MP3, WAV, FLAC, OGG, M4A (AAC), and OPUS with basic settings like bitrate, sample rate, channels, plus simple metadata fields. Powered by ffmpeg.wasm and runs locally in your browser with zero uploads for privacy.
Audio format converter (MP3/WAV/FLAC/OGG/M4A/OPUS) with basic settings. Loads ffmpeg.wasm locally (no uploads).
Drag & drop a new audio file here to replace.
File
-
Metadata
FFmpeg logs