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Free Subliminal Embedder

This web-based tool uses the same core dynamic engine as Submerge Pro. Upload a base track (like a podcast or music file) and an affirmation track, or pick one of our ready-made affirmation presets. The engine automatically ducks and hides your affirmations underneath the base audio, with full control over volume floors and stereo placement. Need to process a whole batch at once? Bulk Batch mode mixes an entire folder of base tracks in one pass and hands you back a single ZIP. Everything is processed locally in your browser — no files are ever sent to our servers.

Step 1

Base Audio

Upload the audio track you want to listen to (e.g., rain sounds, a lecture, or a music track).

Step 2

Subliminal Track

Upload your spoken affirmations, or pick one of the ready-made presets below. The engine will mask it dynamically underneath your base track.

Loading presets…

Engine

Volume & Response

25%
If your affirmation track was recorded quietly, push this well past 100% — it boosts the subliminal's peak level rather than just its share of the mix.
85%
Normally the subliminal ducks all the way to silence when your base track goes quiet or stops, since there's nothing left to mask it. Turning this on sets a floor so it never drops below the level you choose — audible and effective at all times, even over silence. Only enable this if you're fine with the affirmations being consciously audible on their own.
1.0x
Subliminal sits evenly between both channels.
80%
Only affects how loud Live Preview sounds in your speakers/headphones. The exported file's volume always matches your original base track — this control never touches it.
Bitrate
MP3 is compressed, so the export lands close in size to a typical imported MP3.

Upload a base track and a subliminal track to unlock preview and export.

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Keep this tool free

This tool runs entirely in your browser and costs nothing to use. If it's useful to you, a small donation helps cover hosting and keeps it free for everyone.

Support on Ko-fi