About Audio Converter Online

Audio Converter Online is a free online tool for converting, editing and enhancing audio. It is built and operated by Gloath Limited, a software company based in New Zealand.

What it does

Audio Converter Online converts between 17 output formats and opens 27+ input formats, including audio tracks inside video files. It includes a waveform editor, 27 dedicated tools and more than 20 adjustable effects - from EQ and compression to reverb, 8D audio, pitch shifting and noise reduction.

How it works

Unlike most online converters, Audio Converter Online does not upload your files. All decoding, editing, effects and encoding run inside your web browser using the Web Audio API, WebAssembly (ffmpeg.wasm) and JavaScript encoders. This makes it faster, works with very large files and keeps private recordings private.

Free and Pro

Core features are free with no account. An optional Pro subscription adds advanced tools (noise reduction, vocal removal, LUFS loudness normalisation), unlimited batch processing, hi-res export and tag editing, and funds ongoing development.

Key facts

• Product: Audio Converter Online
• Company: Gloath Limited (New Zealand)
• Website: audioconverteronline.gloath.com
• Price: Free; Pro subscription optional
• Platforms: any modern browser on Windows, macOS, Linux, ChromeOS, Android and iOS
• Contact: support@gloath.com

Open-source software

Audio Converter Online is built with open-source software. Thank you to these projects:

• ffmpeg.wasm / FFmpeg - loaded as a separate WebAssembly module (GPL-2.0-or-later / LGPL-2.1). Source: github.com/ffmpegwasm/ffmpeg.wasm.
• LAME MP3 encoder via lamejs (LGPL-3.0), delivered as a separate script.
• Astro, Preact, Hono, fflate, aws4fetch (MIT), Lucide icons (ISC), Inter typeface (SIL OFL 1.1).