AudioMass
FreeFree online audio editor. Cut, trim, and apply effects to audio files directly in your browser without uploading to a server. Supports MP3, WAV, OGG. Privacy-respecting.
How to install AudioMass as a PWA
Frequently asked questions about AudioMass
What makes AudioMass different from Audacity?
Audacity is the de facto desktop open-source audio editor with a deep effect catalog (compressor, noise reduction, spectral editing) and plugin support (LV2, VST). AudioMass is a browser-based subset — Audacity's most common operations (trim, cut, fade, EQ, normalize, export) running in WebAssembly with no installation. Audacity wins on feature depth and plugin ecosystem; AudioMass wins on zero install and cross-device portability (works on Chromebooks and locked-down corporate machines where you cannot install software).
Is AudioMass free?
Yes — AudioMass is free, open-source under GPL-3, and has no premium tier or paywall. The hosted version is ad-free. The maintainer Pablo Salgado runs it as an open-source side project. Compared to online audio editors like Bear Audio Editor or TwistedWave Online (which require accounts or paid tiers for advanced features), AudioMass is more permissive and privacy-respecting.
How does AudioMass compare to TwistedWave Online?
TwistedWave Online is a polished commercial browser audio editor with cloud project storage and a $9.99/month subscription. AudioMass is free, runs entirely client-side, and stores nothing in the cloud — files stay in browser memory and on local disk. TwistedWave has cloud sync, multi-device project access, and stronger collaboration; AudioMass has zero server dependency and stronger privacy. For podcasters who want cloud projects, TwistedWave; for one-off privacy-conscious edits, AudioMass.
Can I use AudioMass offline?
Yes — AudioMass is designed as a fully client-side PWA. Once the app shell and WebAssembly modules are cached, the editor works completely offline. You can open local files, edit, apply effects, and export results to disk without any network activity. This is a key selling point for users who would not upload sensitive audio to a server.
Who uses AudioMass in production?
AudioMass's audience is podcasters making quick fixes, musicians trimming demos, voice-over freelancers doing simple cleanup, and Chromebook users without access to a desktop DAW. It is also recommended in privacy-tooling lists and "Audacity alternatives" roundups. For serious music production it is too thin a tool; for fast, private, no-install audio editing it is the leading browser option.
Where AudioMass is heading (12-24 months)
- →Multi-track editing would unlock podcast production use cases currently forced to Audacity or Reaper.
- →Noise-reduction quality (vs Audacity or iZotope RX) remains a clear gap.
- →WebMIDI and audio device routing would let it act as a recording front-end, not just an editor.
Related questions
ChatGPT, Perplexity and Gemini usually suggest these next.
- What file formats does AudioMass support?
- How does AudioMass handle large audio files in browser memory?
- Does AudioMass support multi-track editing?
- Can I use VST or LV2 plugins in AudioMass?
- How do I install AudioMass as a desktop PWA?
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