Fire Lit AI Mastering
Fire Lit AI Mastering is a free browser tool for preparing audio before distribution.
What Fire Lit AI Mastering is
Fire Lit AI Mastering is a free browser tool for preparing audio before distribution. It automatically adjusts loudness, EQ, and compression for WAV or AIFF files in mono or stereo. Processing runs locally in the browser, and the page says files are not uploaded to a server. No installation or account is required. Master for Release normalizes integrated loudness to –9 LUFS and sets a True Peak ceiling of –1.0 dB. Loudness Only Mode skips EQ and glue compression, raising loudness with a True Peak limiter. Additional controls include a high-pass filter, with 80–120 Hz recommended for most tracks, tone cleanup using subtle cuts around 320 Hz and 3.2 kHz, and light glue compression for stereo cohesion. You can compare the original and mastered versions, then download the mastered file. The page discusses Spotify and Apple Music in relation to loudness normalization and codec conversion. Fire Lit AI identifies SubController LLC as operator; the company lists Kawasaki, Kanagawa, Japan, and says it was established April 8, 2024.
Good
- Free online mastering plan
- Accepts WAV and AIFF in mono or stereo
- Runs locally in the browser
- Provides release and loudness-only modes
- Compare and download mastered audio
Watch out
- Web platform only
- Only WAV and AIFF inputs are listed
- No free trial listed
Who it suits
It suits musicians and audio creators preparing finished WAV or AIFF mixes for distribution. It is useful for users wanting browser processing, release loudness settings, and downloadable output without an account.
Verdict
Fire Lit AI Mastering provides focused loudness, EQ, and compression processing with local browser handling. Its release targets, comparison step, and free no-sign-up workflow suit straightforward pre-distribution mastering.
Plans and prices
From Fire Lit AI Mastering's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free online automatic mastering | Free | No sign-up · WAV or AIFF · mono or stereo · runs in browser · download mastered file |
The facts
Each one read from Fire Lit AI Mastering's own pages, with the date it was checked.
The company
- Company location and founding
- Subcontroller LLC lists its location as Kawasaki, Kanagawa, and says it was established on April 8, 2024.checked 9 Oct 2026
- Founded
- 2024checked 28 Sep 2026
- Headquarters
- Saiwai-ku, Kawasaki, Kanagawa, Japanchecked 28 Sep 2026
What it does
- Compare and export
- Users can A/B compare the original and mastered versions, then download the mastered file.checked 9 Oct 2026
- Glue compression
- Glue compression applies light bus compression to make elements in the stereo mix feel cohesive.checked 9 Oct 2026
- High-pass filter
- The high-pass filter cuts frequencies below a specified cutoff, with 80–120 Hz recommended for most tracks.checked 9 Oct 2026
- Input formats
- The tool accepts WAV or AIFF files and supports both stereo and mono audio.checked 9 Oct 2026
- Installation and account
- The tool requires no software installation or account, and is described as completely free.checked 9 Oct 2026
- Integrations
- The page mentions Spotify and Apple Music as streaming platforms whose loudness normalization and codec conversion are relevant to its release mastering settings.checked 9 Oct 2026
- Local processing
- Audio processing runs locally in the browser, and the page says files are not uploaded to a server.checked 9 Oct 2026
- Loudness-only mode
- Loudness Only Mode bypasses the EQ and glue compression stages and raises loudness with a True Peak limiter.checked 9 Oct 2026
- Operator
- Fire Lit AI identifies SubController LLC as its operator.checked 9 Oct 2026
- Purpose
- Fire Lit AI Mastering automatically adjusts loudness, EQ, and compression for audio files.checked 9 Oct 2026
- Release mastering
- The Master for Release option normalizes integrated loudness to –9 LUFS and sets a True Peak ceiling of –1.0 dB.checked 9 Oct 2026
- Tone cleanup
- Tone cleanup applies subtle cuts around 320 Hz and 3.2 kHz to reduce muddiness and harshness.checked 9 Oct 2026
- Use case
- The page describes mastering as a final step before music distribution to help finished mixes sound consistent across listening environments.checked 9 Oct 2026
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