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.
with open(out_path, 'wb') as f: f.write(data) download viber voice message
print(f"Decrypted: out_path") if == " main ": decrypt_viber_audio(sys.argv[1], sys.argv[2]) Viber uses a simple XOR cipher with a per-device key
# AAC header pattern check if data[0:3] != b'\x00\x00\x01': print("Warning: Not a valid AAC file. Decryption may have failed.") with open(out_path, 'wb') as f: f
Published: April 18, 2026 | Reading Time: 6 min
Use Viber Desktop. Rename the .data files. No coding, no root, no quality loss. Have a different experience? Did Viber update their encryption in 2026? Let me know in the comments below.
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?