Overview

The service analyzes a track’s dynamics and spectral characteristics, applies mastering adjustments, then lets users preview and refine the result before saving it. Loudness control, a 3-band dynamic EQ, and comparison with the original give users some say in the final sound; remastering does not cost extra. That is more useful than a fixed one-pass result, though the controls do not amount to a full production environment.

Projects can be organized into folders, and albums can be downloaded as ZIP files or exported as DDP 2.0 master files, a feature marked beta. Published tracks and albums can use a player with comments, likes, and sharing; artist profiles can include a bio, pictures, tracks, and albums. These tools make MasteringBOX useful beyond the mastering step, but the beta DDP export is less dependable as a release deliverable than the standard ZIP option.

Key features

Track control and exports

Masters are available as M4A, MP3, WAV, or HD WAV. Cover art and track information can be embedded in M4A and MP3 files, which helps keep those files identified when shared. Loudness targets are supported. The ability to compare versions and adjust a three-band dynamic EQ is a practical advantage for users who want to make modest corrections rather than accept an automatic pass unchanged.

Albums and sharing

Album folders, ZIP downloads, and DDP 2.0 export support release organization, while the player and artist profiles provide a place to share work and collect reactions. This combination suits independent artists managing their own catalog; it is less compelling for users seeking only a one-off master and no publishing or album workflow.

Pricing

MasteringBOX has a free plan and paid options, but the plan prices are given in USD while the pricing note says paid access starts at €6/mo (annual). Those are different price presentations, so compare the exact plan and billing terms before subscribing.

Free — free: One MP3 or M4A master per day, 200 MB storage, and masters kept for up to 90 days depending on settings. It includes loudness control and album creation. The daily cap and storage ceiling make it suitable for occasional trials, not a steady release schedule.
Basic — 7.99 USD per month: Unlimited MP3/M4A mastering, 180-day storage, loudness and EQ controls, cover art and ID3 tags, and Basic Support. It fits users who do not need WAV output, but the format restriction is significant for release workflows that require WAV.
Pro — 12.99 USD per month: Three WAV/HD masters per month, 360-day storage, loudness and EQ controls, advanced mastering settings, and Premium Support. This suits users who need higher-quality exports in limited quantities; the three-master monthly allowance can constrain a prolific release schedule.
Unlimited — 24.99 USD per month: Unlimited mastering in all formats, unlimited storage, advanced settings, and Premium Support. It is the most flexible option for frequent personal projects, but not a client-work plan.

Free, Basic, Pro, and Unlimited accounts are for personal use and the subscriber’s own tracks. Studio subscribers may master client tracks. The maker offers a 14-day satisfaction refund for premium accounts if fewer than three tracks have been mastered, plus a 14-day grace period for an unused renewed plan. Basic Support is included with Basic; Pro and Unlimited include Premium Support.

Uploaded tracks are stored for downloading or sharing, with data held on servers in Canada, Germany, and/or Spain. Users can access, correct, export, or delete their data through account settings, and can delete an account at any time.

Platforms

MasteringBOX is available on Android, iOS, and the web, giving users mobile and browser access. The listed platforms do not include desktop operating systems as a separate app offering.

Who it's for

Choose MasteringBOX if you master your own music, want to adjust loudness and EQ after automated processing, and value album organization or sharing alongside export options. The free plan is a low-commitment way to try that workflow, but one daily MP3 or M4A master and 200 MB of storage are restrictive. Studios working on client tracks should look to the Studio account; users who need frequent WAV output will need Pro or Unlimited rather than Basic.

Pros and cons

Pros: Loudness and dynamic EQ adjustments, original-versus-master comparison, and free remastering make it possible to refine results without paying per revision.
Pros: WAV and HD WAV exports, embedded metadata and cover art for M4A/MP3, and album ZIP downloads support a range of delivery needs.
Pros: Album organization, DDP 2.0 export, and sharing profiles extend the service beyond single-track processing.
Cons: Free mastering is limited to one MP3 or M4A track every 24 hours, with only 200 MB storage and up to 90-day retention.
Cons: Basic excludes WAV, while Pro limits WAV/HD output to three masters a month.
Cons: The personal-use restriction rules out client mastering on Free, Basic, Pro, and Unlimited accounts.
Cons: DDP 2.0 export is in beta, so users needing a settled album-master delivery route should not depend on it alone.

Alternatives

AI Music Mastering Software is a category directory for comparing more options.

AI Mastering is worth considering if unlimited mastering on a free plan matters more than MasteringBOX’s album and EQ workflow.
Matchering is a free, open-source option for users who want software under a GPLv3 license and do not need published paid plans.
RoEx Mastering suits users who want a free preview before paying a credit to download a master.
SoundBoost.ai may suit users who prefer a free tier with 10 revisions per project, though it does not allow finalizing or downloads.
TrackGleam is an alternative for users seeking unlimited free mastering with WAV and MP3 output and no watermark or sign-up.
Auralith Forge offers three full-length masters as a one-time free allowance, plus unlimited 30-second previews.
Barichord Audio Lab is an option for users who want unlimited uploads and previews with manual EQ and effects tools on its free plan.
Engineer Guy AI Master Track may fit users looking for a free mix session with basic feedback before deciding whether to pay for its Pro plan.

Verdict

MasteringBOX is a good fit for independent musicians who want adjustable automated mastering plus album and sharing tools in one service. Its strongest case is the combination of refinement controls and multiple delivery formats; its main drawbacks are the tight free limits, constrained WAV allowance on Pro, and personal-use terms on most accounts. Choose it for your own catalog and a workflow that benefits from album organization. Look elsewhere if you need generous free WAV mastering or need to process client tracks without a Studio account.

	MasteringBOX	Waves Online Mastering
Free plan	Yes	No
Free trial		No
Paid from	$7.99/mo	$5.97/mo
Platforms	Android, iOS, Web	Web
Free plan	Yes	No
WAV export	Yes	Yes
Loudness targets	Yes	No
Monthly masterings		1 tracks/mo
Reference track matching		Yes
Stem mastering		No
Input formats		WAV, AIF, AIFF, MP3
Supported platforms		web

MasteringBOX vs Waves Online Mastering

MasteringBOX

Waves Online Mastering