SoundBoost Alternative: Free Browser Mastering
Published · by Loopin
SoundBoost is fast and lets you describe the master in words, but at the time of writing its free full export can carry an audio tag. If you need a clean, free WAV today, test an alternative on the same mix, level-matched.
Credit what SoundBoost does well
At the time of writing (October 2026), SoundBoost is a web-based masterer where you upload a mix and describe what you want — "warmer", "louder without crushing the drums" — instead of turning knobs. Bedroom Producers Blog reports its Engine v4 update masters a three-minute track in roughly ten seconds, with six starting profiles including warm, punchy, loud and clear.
If you know what you want but not how to get it, the prompt approach is genuinely useful. It's also quick, with no installer. That's a fair bar for any alternative to clear.
Read the free tier closely
The same report says you can hear a free preview without an account, and there's a free full-export mode, but that the current version may insert a random vocal tag into the finished file. That's fine for testing, not for a release. Paid plans remove it; reviews list monthly and annual unlimited tiers, with app pricing that differs from the web.
Prices change, so check two things on the pricing page before you commit: what a clean WAV costs you this month, and whether the plan you're looking at is web or app. If you only master a few songs a year, a subscription is the wrong shape.
Swap prompts for feels
Loopin doesn't take text prompts; it gives you eight feels. Most prompts map onto one: "warmer" is Warm, "punchier" or "louder" is Punchy (about −11 LUFS), "clearer" or "brighter" is Crisp, "bigger stereo" is Wide, "old-school" is Vintage, "festival loud" is Club (about −10 LUFS), "dusty" is Lo-fi and "film-like, dynamic" is Cinematic (about −16 LUFS).
Master the track free with the feel that matches your prompt, and try the next-closest one too. There's no account and no export cap, so a two-feel test costs nothing.
Test both on one mix, at the same loudness
Export one mix peaking around −6 dBFS with nothing on the master bus. Run it through SoundBoost's preview and Loopin's chosen feel. Then level-match: turn the louder one down until both read the same LUFS. Unmatched, the louder master wins every time.
Loopin's Original-vs-Mastered switch is already loudness-matched, so you can hear exactly what the processing did. Then compare the two masters on low end, vocal clarity and the loudest chorus. How to A/B your master properly has the full routine.
Check the file you'll actually release
Whichever you pick, listen to the downloaded file start to finish, not the preview. That's where a tag, a click at the start, or a clipped final chorus shows up. Loopin exports a 16-bit WAV at about −14 LUFS with a −1 dBTP ceiling unless you chose a louder or quieter feel.
Play it on a phone, headphones and a laptop or car. If the vocal is clear on the phone and the chorus is clean on headphones, it's ready for your distributor.
Pick per track, not for life
If SoundBoost's prompt nails a sound you couldn't describe with a preset, and you release often, a subscription may be worth it. If you want an unlimited, no-sign-up option for demos, beat tapes and most singles, run it through the free masterer and keep the money.
Neither will fix a buried vocal or a boomy mix. If both masters share the same flaw, the problem is in the mix.
Frequently asked questions
Is SoundBoost free?
Partly. At the time of writing (October 2026) there's a free preview without an account and a free full export that may include a vocal tag. Clean exports need a paid plan; check its pricing page.
What is a free alternative to SoundBoost?
Loopin Mastering is free and unlimited with no sign-up. It offers eight feels and exports a clean 16-bit WAV at about -14 LUFS with a -1 dBTP ceiling.
Does Loopin support text prompts like SoundBoost?
No. You pick one of eight feels: Warm, Punchy, Crisp, Wide, Vintage, Club, Lo-fi or Cinematic. Most prompts map closely onto one of them.
Is SoundBoost good?
It's fast and the prompt control is useful if you know the sound you want. Test it on your own mix, level-matched, against an alternative.
How do I compare two online masterers?
Use the same mix, match loudness within about 0.5 dB, then compare low end, vocal and the loudest chorus. Judge the downloaded file, not the preview.
What LUFS should my master be?
Around -14 LUFS with a -1 dBTP ceiling for streaming. Rap and dance can sit near -11 to -10 LUFS.