Runs entirely in your browser - no upload, no sign-up.
Your source and reversed audio stay in this browser tab. The audio is never uploaded.
A reverse audio tool decodes a recording, flips its samples from end to beginning, and rebuilds the result so it plays backwards. Choose an MP3, WAV, M4A, or other common audio file here, preview the reversal, and download a WAV without uploading your recording.
Drop an MP3, WAV, M4A, FLAC, OGG, AAC, or another common audio file into the tool.
Listen to the source and confirm that you selected the right recording.
Select Reverse audio. The browser decodes the track, reverses every sample, and creates a WAV.
Preview the backwards result, then download the reversed WAV to your device.
This audio reverser runs FFmpeg inside your browser. Its areverse filter buffers the decoded audio stream, reverses the order of every sample, and writes an uncompressed 16-bit WAV. The original file stays unchanged.
Reversal changes time direction, not playback speed. A three-minute track remains three minutes long. Because the new file is WAV, a compressed MP3 or M4A source can produce a much larger download.
No. The selected file, decoding, reversal, preview, and result remain in your browser tab. The first use downloads the FFmpeg engine code, but your recording is not sent with that request. Refreshing or closing the tab releases the temporary local file URLs.
Yes. You can reverse audio and download the result without an account, subscription, watermark, or credit limit. The practical limits are the memory and processing speed available to your browser, especially for long compressed recordings that expand during decoding.
The conservative cap adapts to the device: 100 MB on mobile or lower-memory hardware, 250 MB on typical desktops, and 500 MB on high-memory desktops. Audio can occupy several times its stored size while decoded, and the uncompressed WAV result may also be large.
Yes. Choose an MP3 and the local engine will decode it, reverse the audio samples, and export a WAV. The result does not add another lossy MP3 encoding pass, but it cannot restore detail already removed when the source MP3 was created.
The tool accepts common formats including MP3, WAV, M4A, AAC, FLAC, OGG, Opus, AIFF, WebM audio, AC3, and WMA. Built-in preview support varies by browser, while the local FFmpeg engine may still process a file the audio player cannot preview.
No. The result keeps the same duration and sample rate, so its overall pitch does not change. What changes is the direction of every event: attacks become fades, fades become attacks, and words or melodies unfold from their final sample to their first.
WAV stores uncompressed pulse-code modulation audio, while MP3, AAC, and many M4A files use compression. The WAV therefore needs more bytes even though the duration is unchanged. The exact size depends on sample rate, bit depth, channel count, and track length.
The tool will faithfully reverse the sample order, so it can expose intentionally backmasked material. Human hearing is also good at finding familiar patterns in ambiguous sounds, so apparent words in ordinary reversed speech are not proof that a message was deliberately added.
