Finds what needs attention
Reads loudness, dynamics, tonal balance, and stereo risk, then sets a smarter starting point.Intelligent analysis · auto-configuration
Free Online Audio Mastering.
Release-Ready in Minutes.
Drop in your mix and download a mastered WAV or MP3 with no upload, account, or watermark. Your audio is processed privately in your browser.
- Audio stays on your device
- 6,800+ tracks mastered
- Free WAV + MP3
- No account required
Drop your track to master it free
Your audio stays on this device. Choose one track — or a whole release at once.
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100% Private · No Upload · No Account · No Watermark
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How to master a song online free
Three steps, no account — free AI audio mastering that runs entirely on your device.
- Upload privatelyAnalysis runs in your browser — your file never leaves this device.
- Compare the resultHear the original and free master at matched volume.
- Download or hear AIKeep the free master, or compare the optional AI version.
How TrackGleam masters your music
TrackGleam is a free browser-based audio mastering tool: your MP3, WAV, FLAC or M4A is mastered on your own device — nothing uploads, no account, no watermark — through a 14-stage chain targeting release-competitive loudness.
Not a one-size preset — a measured, verified loop that runs entirely on your device. Tap a step:
Loudness, true peak, dynamics, an 8-band tonal balance, stereo width, and artifact patterns — measured right in the browser. Your file never uploads; only the numbers behind an optional AI version are ever sent anywhere.
Your numbers are compared against genre-calibrated targets tuned to how music in your style is finished — a lo-fi beat and a metal mix are never pushed toward the same curve.
The AI reads the gap and writes a mastering recipe for your song, with a plain-English reason for every move — that's the “What Auto heard and did” box beside the player.
Then it does what a mastering engineer does: it checks its own work. The engine re-measures the master it just made and corrects — a closed loop that repeats until tonal balance and loudness lock in. That's the Gleam Engine V2: a 14-stage chain, tuned to what your track actually needs.
🎯 Reference Mastering — trained on the song you pick
Big-name AI masters are “trained on millions of songs” you'll never hear or choose. TrackGleam flips that: drop in the exact commercial track you want to sound like, and the engine matches its tonal signature with a linear-phase filter. Your reference, your call — and you can hear the match against the original.
Measured, not magic. Every number the engine shows is real and yours to verify — run the finished master through any LUFS meter and the readings match. No black box, no mystery dataset.
See the complete 14-stage chain
ToneDynamicsColor & SpaceDelivery
- Input Conditioning
- 8-Band Parametric EQ
- Dynamic EQ
- Multiband Compression
- Parallel Glue
- Upward Density
- Stereo Imaging
- Multiband Saturation
- Harmonic Exciter
- Brickwall Limiter
- Mid/Side EQ
- Transient Shaping
- De-Harsh
- TPDF Dithering
Every stage is configured automatically for your specific track — right in your browser.
What TrackGleam improves
Controls harshness and mud
Tames brittle highs, boxy mids, and low-end buildup so the track reads clearly on any system.8-band + dynamic EQ · de-ess · de-harsh
Balances loudness and dynamics
Brings the track to release-competitive loudness under a -1.0 dBTP true-peak ceiling while keeping punch and breathing room.Multiband + glue compression · brickwall limiter
Protects stereo and peak safety
Keeps bass mono-safe and holds a true-peak ceiling so playback and format conversion stay clean.Stereo imaging · bass mono-sum · −1.0 dBTP
What leaves your device?
Your audio file stays on this device from analysis through download.
- Audio fileNever uploaded
- Free masteringProcessed locally
- Optional AI versionNumeric measurements only
- AnalyticsPage interactions only, never audio
How the Free Tiers Actually Compare
Looking for a free LANDR alternative? TrackGleam masters your song in the browser at no cost, with no account and no upload — unlike LANDR, Waves, and eMastered, which gate downloads behind subscriptions or per-track fees. You get a watermark-free, release-ready master (about −11 LUFS at a −1.0 dBTP ceiling; Low intensity gives a −14 streaming-safe take) to download instantly, plus an optional $1.99 AI master.
Checked July 2026 — full details on the LANDR comparison and alternatives roundup pages.
| Tool | Free download | One master costs | Signup | Your audio uploads |
|---|---|---|---|---|
| TrackGleam | Yes — WAV/MP3, no watermark | $0 free · optional AI $1.99 once | No | Never — processed on your device |
| LANDR | No — preview only | $10 | Yes | Yes |
| Waves Online | No — 30-sec preview | $3.99 ("$1.99" needs a $71.64/yr plan) | Yes | Yes |
| eMastered | No — preview only | $49/mo subscription (monthly) | Yes | Yes |
| BandLab | Yes — 16-bit | Free | Yes | Yes |
FAQ
Is the free master good enough to release?
Yes. Nothing is held back.
The free master runs the full 14-stage Gleam chain — you export the whole song as a full-precision 24-bit WAV, no watermark, and you can master as many songs as you like. GleamAI is not a higher grade of the same master — it is a different set of decisions about your song, made from 60+ measurements of your track, with four extra stages it can reach for when your measurements call for them; anything that measures worse is reverted to your free master. Gleam corrects your track. GleamAI makes decisions about it.
Does TrackGleam upload my audio?
No. Your audio file is decoded and processed inside your browser, on your own device — it is never uploaded to a server. For the optional AI version, only numeric measurements (loudness, tone balance, stereo profile) are sent; the audio itself never leaves your device.
Can I master a song online for free?
Yes — you can master a song online for free with TrackGleam: drop in a WAV, MP3, FLAC or M4A and download the finished master as a WAV or MP3, with no signup and no watermark. The free master is a real download — full WAV, not a 30-second preview or a paywalled render.
What loudness does TrackGleam target?
Auto mode targets release-competitive loudness — about -11 LUFS integrated, with genre styles ranging from -9 LUFS (EDM, hip-hop, metal) to -15 LUFS (classical), always under a -1.0 dBTP true-peak ceiling. That matches how commercial releases are actually mastered: measured chart hits average around -8 LUFS, and streaming platforms simply turn louder masters down on playback. Prefer the traditional streaming-safe master? The Low intensity targets -14 LUFS.
Can I use the result on Spotify or Apple Music?
Yes. Every master keeps a -1.0 dBTP true-peak ceiling, and Spotify, Apple Music, YouTube, Tidal, and Amazon Music normalize loudness on playback — a competitive master is simply played at the platform's level, exactly like commercial releases are. Want a master that needs no turning down at all? The Low intensity targets -14 LUFS, close to Apple Music's -16 reference.
What does the optional GleamAI master change?
GleamAI, TrackGleam's optional paid tier ($1.99 per track), makes track-specific EQ, compression, loudness, and stereo decisions on top of your free Gleam master. It is a different take, not automatically better — you can preview the full result free, then pay $1.99 once to remove the watermark and download. The free master is always yours to keep.
Can TrackGleam improve Suno or Udio tracks?
Often, yes. The AI Fix presets can reduce the metallic shimmer, brittle highs, harsh upper-mids, and unstable stereo common in AI-generated music using subtractive EQ, tighter high-band control, and safer stereo handling. They cannot fully reconstruct audio that is already damaged.
Which formats are supported?
TrackGleam accepts MP3, WAV, FLAC and M4A files as input — or a video (MP4, MOV, WebM; it masters the audio track) — and exports your master as a WAV (16, 24, or 32-bit float) or an MP3 at 320 kbps.
How does TrackGleam compare with LANDR?
Same core craft — analysis, EQ, multiband compression, saturation, stereo processing, and limiting — but a different deal. As of July 2026, LANDR's free tier is a preview you cannot download, its cheapest single download is $10, and every master uploads your audio to its servers. TrackGleam's free master is a real watermark-free WAV with no account, processed entirely in your browser.
Featured learning guides
Short, original notes on getting a better master. Browse all guides →
Streaming loudness in plain English
Most streaming services turn loud songs down. That means a master that is simply louder is not automatically better. In practice, a controlled, clean, balanced master often survives normalization better than an over-limited one.
- Use the Low intensity when you want the classic -14 LUFS streaming-safe target; Auto targets release-competitive loudness.
- Use louder genre presets when you want more density and energy.
- Watch true peak and harshness, not just overall loudness.
What AI cleanup can and cannot do
TrackGleam can often reduce brittle highs, unstable stereo, and metallic shimmer, but it cannot fully reconstruct damaged transients or replace a bad generation with a perfect recording. Think of AI Fix as artifact taming, not full restoration.
Why mono bass matters
Very wide bass can collapse badly on phones, club systems, or mono playback. TrackGleam can mono-sum the lows below a chosen point so the center stays punchy and more translation-friendly.
Why some masters look smaller after processing
A processed waveform is not always visually bigger. Corrective EQ, trimmed silence, safer true-peak control, and preserved dynamics can produce a waveform that looks less inflated while sounding more polished and more portable across playback systems.
How to prepare a mix before you master it
A mastering tool works best on a balanced mix with enough headroom. If your kick is distorting, your vocal is buried, or your stereo image is unstable, mastering can only polish those problems, not fully undo them. For best results, export a clean stereo mix, avoid clipping on the mix bus, leave obvious corrective moves to the mix stage, and use mastering for final tone, loudness, width, and delivery.
1. Leave headroom
TrackGleam can raise loudness safely, but it performs best when the source is not already crushed. A mix that peaks below 0 dBFS and still breathes usually masters better than one that is already slammed.
2. Fix the mix first
If the low end is wildly uneven or the snare is painfully harsh, correct that in the mix when possible. Mastering is strongest when it makes broad, musical finishing moves.
3. Pick the right preset
Use Auto for release-competitive delivery (pick the Low intensity for the -14 streaming-safe target), genre presets when you want more flavor, and AI Fix only when a track truly has brittle, metallic, unstable artifact patterns.
4. Trust your ears
The processed waveform and meters help, but your ears still matter most. Toggle between original and processed playback and watch for dullness, pumping, or over-bright tops.
Want the details? See about TrackGleam, our GleamAI pricing, or get in touch — and our full disclosures and privacy policy.