How to Master a Song for Free
Updated June 2026 · by Loopin
You don't need a studio, plugins or a budget to master a song. Here's how to get a loud, balanced, streaming-ready master for free — and how to tell when it's actually finished.
First, get your mix ready
The best master starts with a clean mix. Before you master anything, bounce your finished stereo mix with a little headroom — aim for peaks around −6 dB rather than slamming the master fader. That gives the mastering stage room to work without fighting clipping you baked in earlier.
Export at the highest quality you can — a WAV at your project’s sample rate is ideal. Don’t add a loudness-maximising limiter on your mix bus first; that’s the mastering step’s job, and doubling up on it just squashes the life out of the track.
Master it free online
The fastest free route is automated online mastering. Drop your mix into Loopin’s free mastering and it measures the track, balances the overall tone, raises it to a competitive streaming loudness and limits true peak so nothing distorts — no plugins, no account, in a couple of minutes.
This gets demos, singles and beats to a finished, release-ready level without a studio. If you’re weighing it against paid services, free online mastering vs LANDR and eMastered breaks down where each one fits.
Check it against the loudness targets
A good free master hits the same targets a paid one does: around −14 LUFS integrated with a true-peak ceiling near −1 dBTP. That sits competitively on Spotify, YouTube and Apple Music without getting turned down or distorting. If LUFS is new to you, what is LUFS explains it plainly.
Resist the urge to push louder ‘for impact’. Streaming normalisation turns an over-loud master back down anyway, so you’d only be trading dynamics for nothing. Hit the target and keep the punch — that’s the whole game.
Trust your ears, not the meter
The final check is listening. A/B the master against your original mix, loudness-matched, so you judge the tone and not just the volume — louder almost always sounds better for a second even when it isn’t. Then play it on a couple of systems: earbuds, a phone speaker, the car. If it holds up everywhere, it’s done.
If something sounds harsh or thin, the fix is usually back in the mix, not the master — re-export and run it again with the free mastering tool. Mastering polishes a good mix; it can’t rescue a broken one. Get the mix right and free mastering will carry it the rest of the way.
Frequently asked questions
Can you really master a song for free?
Yes. Loopin's free online mastering balances your mix, targets streaming loudness around -14 LUFS and limits true peak to about -1 dBTP automatically, with no plugins, no studio and no account.
How loud should a free master be?
Aim for around -14 LUFS integrated with a true-peak ceiling near -1 dBTP. That's competitive on Spotify, YouTube and Apple Music without getting turned down or distorting on playback.
Is free mastering good enough to release?
For demos, singles and beats, yes — a free online master gets most independent releases to a clean, loud, streaming-ready level. Big-budget releases may still want a human mastering engineer, but for home releases it's more than enough.