Check Audio for Backmasking

Reverse a track to listen for hidden backwards messages.

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MP3, WAV, FLAC, OGG, AAC, M4A, Audio ingen filstørrelsesbegrænsning

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Reverse an audio file so it plays backwards. Great for music production and checking for "backmasking". Runs entirely in your browser.

backmasking tips

🕵️

Reverse a song to check the old "hidden message when played backwards" claims for yourself.

🎧

Reverse it again and you get the original back — it's a lossless operation in principle.

🔁

A fun way to explore audio you already have.

🔒

Runs locally in your browser.

Vælg fil

Drop your file into the tool above. It stays entirely on your device — nothing is sent to any server.

Behandl

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Hent

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

✓Helt gratis — ingen skjulte omkostninger, nogensinde

✓Ingen konto, e-mail eller login krævet

✓Filer forlader aldrig din enhed

✓Ingen filstørrelsesbegrænsninger overhovedet

✓Ingen vandmærker på noget output

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