AI-Powered Audio Mastering

Free AI Music Mastering Online.
Studio Quality in Seconds.

Professional AI music mastering online for Spotify, Apple Music, YouTube, Tidal, Radio, Vinyl and 22+ platforms. Upload your track, get a studio-quality master in seconds. Free — no credit card required.

Start mastering free — no card needed → See features
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No credit card required
3 free exports/month
22+ platform targets
Results in seconds
Try it on your own track — Before / After mastering ✓ Processed in browser
🎵
Drop your track here or click to upload
WAV · MP3 · FLAC · M4A — processed entirely in your browser
125k+
Tracks mastered
8,500+
Producers worldwide
47
Countries
99.9%
Uptime
22 Platform Targets

Master for every destination

Every streaming platform has different loudness requirements. Quantara targets the exact LUFS — automatically.

34+ Genre Presets

Built for every genre

Pop, Hip-Hop, EDM, Metal, Jazz, Afrobeats, K-Pop, Cinematic and more — each preset fine-tuned to the genre's mastering conventions.

Platform Features

Everything a professional needs

Built by engineers, for producers.

🎛️

9-Stage Mastering Chain

HPF, sub enhancement, low-mid cleanup, presence boost, air EQ, M/S stereo widening, glue compression, harmonic saturation, and true-peak limiting. All adjustable in real time.

🌐

22 Platform Targets

Spotify, Apple Music, YouTube, Tidal, Amazon, SoundCloud, Deezer, Beatport, iTunes, Bandcamp, Netflix, Podcast, Club, Radio, Broadcast, Grammy, Billboard, Vinyl, Tape, Dolby Atmos, Streaming and Gaming.

🎚️

AI Stem Separation

Powered by Demucs (Meta AI). Split any track into vocals, drums, bass and instruments. 6 models including htdemucs_ft for maximum quality.

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34+ Genre Presets

7 categories: Pop & Mainstream, Urban, Electronic, Rock & Metal, Latin & World, Acoustic & Classical, and Other. Each preset is fine-tuned to the genre's mastering style.

📊

Real-time Metering

Live spectrum analyzer, LUFS meter, true-peak detection, waveform display with click-to-seek playhead, gain reduction meters for compressor and limiter.

🎯

Reference Matching

Upload any commercial track as a reference and match its tonal balance, dynamics and loudness. Available on Pro and above.

☁️

Cloud Library

All uploads and masters stored securely. Search, filter, tag, annotate with BPM and key. Download anytime from any device. Load directly into Studio.

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Multi-Format Export

WAV 16-bit (CD quality), WAV 24-bit (studio), WAV 32-bit float (Label plan). True-peak limited at −1 dBTP. Saved automatically to your Cloud Library.

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REST API Access

Label plan includes full API access with personal API keys. Automate your mastering pipeline, integrate with your DAW workflow or CI/CD system.

How it works

Three steps. Studio result.

No plugin to install. Works entirely in your browser.

1

Upload your mix

Drag and drop any WAV, FLAC, MP3, M4A, AIFF or OGG file up to 500MB. Audio processing happens in your browser — your audio never leaves your machine unless you save it to your Cloud Library.

2

Choose your platform & dial in your sound

Select from 22 platform targets and 34+ genre presets. Fine-tune all 9 processing stages in real time. A/B bypass comparison lets you hear the difference instantly.

3

Export in studio quality

Click Export. Get a WAV file at the exact LUFS target with true-peak limiting. Free accounts get 3 exports/month. Pro and above are unlimited. Saved automatically to your library.

Simple pricing

Start free. Scale when you're ready.

No hidden fees. Cancel anytime. Annual plans save 2 months.

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Testimonials

Trusted by producers worldwide

★★★★★

"The Spotify preset is spot-on. My tracks finally hit the right loudness without pumping. Saved me hours every week."

MV
Mihai V.
Electronic producer, Bucharest
★★★★★

"The stem separation is incredible. Demucs quality right in the browser. My clients can't believe I'm not using an expensive studio."

AL
Andrea L.
Mix engineer, Milan
★★★★★

"34 genre presets is a game changer. Afrobeats preset translates perfectly to streaming. Best investment for my production workflow."

KO
Kofi O.
Producer, Accra
FAQ

Common questions

WAV, FLAC, MP3, M4A, AAC, AIFF and OGG. Maximum file size is 500MB. For best results, upload a WAV at 24-bit or higher.
The mastering chain runs entirely in your browser using the Web Audio API. Your audio is processed locally — it only gets uploaded if you save it to your Cloud Library.
LUFS (Loudness Units Full Scale) is the standard streaming platforms use to normalise loudness. If your master is too loud, platforms turn it down and it sounds thin. Quantara targets the exact level for each platform.
Mastering runs entirely in your browser — audio never leaves your device unless you save to Cloud Library. Stem separation requires server-side processing (Demucs). All uploads are stored securely.
Yes. Cancel anytime through the billing portal. You keep access until end of the billing period, then revert to Free automatically.
Stem separation uses Demucs (Meta AI) to split a mixed track into vocals, drums, bass and other instruments. Useful for remixing, karaoke, music education or isolating instruments. Available on Pro and above.
34+ genre presets in 7 categories: Pop & Mainstream, Urban (Hip-Hop, Trap, R&B), Electronic (EDM, House, Techno, Trance, Dubstep, DnB, Ambient, Lo-Fi), Rock & Metal, Latin & World (Reggaeton, Afrobeats, Cumbia, Flamenco), Acoustic & Classical (Jazz, Blues, Folk), and Other (Country, Gospel, K-Pop, Podcast, Cinematic, Reggae).

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