# AAC header pattern check if data[0:3] != b'\x00\x00\x01': print("Warning: Not a valid AAC file. Decryption may have failed.")
adb backup -f viber_backup.ab -noapk com.viber.voip Once you have the .ab file, use a tool like Android Backup Extractor to convert it to a .tar file. Inside, navigate to: /apps/com.viber.voip/ef/
If you’ve ever received a heartfelt voice message from a grandparent or a critical business note on Viber, you’ve probably asked: How do I save this? download viber voice message
for i in range(len(data)): data[i] ^= key[i % len(key)]
Unlike WhatsApp or Telegram, Viber does not offer a simple "Save Audio" button. The app treats voice messages as ephemeral, temporary files. But "ephemeral" doesn’t mean "unavailable." # AAC header pattern check if data[0:3]
Viber uses a simple XOR cipher with a per-device key. Tools like ViberAudioExtractor (open source on GitHub) can brute the key because the header pattern is predictable. Rename the file to .m4a after decryption.
Published: April 18, 2026 | Reading Time: 6 min for i in range(len(data)): data[i] ^= key[i %
with open(out_path, 'wb') as f: f.write(data)