Below is a randomly generated ciphertext(*), each block representing 128 bits. Click on any portion to introduce errors. Below, you can see how the error propagates through decryption with different block cipher modes.
Ciphertext(*):
d 5 5 2 a e 7 d 9 2 8 4 e d 1 a b 3 1 3 5 4 7 e b 6 2 0 4 a 8 a
4 3 2 e c 0 6 7 6 b a a 3 a c f c 1 e b 6 9 a f b 8 4 1 5 c 5 c
1 5 0 1 7 1 8 d 8 b c 5 1 4 6 5 3 b 9 a 7 e a 8 0 1 e 9 8 e 2 3
6 7 c d e 5 d 3 f 1 c 1 2 9 8 b a 4 0 f 8 2 f 9 b 7 0 c 8 1 f a
Decrypted:
ECB
5 c 0 5 c c 7 5 2 9 c c 3 b 0 0
4 7 f e 9 3 b 1 d 2 e 6 e 3 1 9
4 7 f e 9 3 b 1 d 2 e 6 e 3 1 9
8 c 9 f d 6 c a a 7 f e 3 d d e
9 a a e d a 1 2 1 9 b e d f e 5
9 a a e d a 1 2 1 9 b e d f e 5
d a 6 f 0 f d e 0 2 7 c d 5 e c
3 3 2 f 4 7 7 8 1 8 2 4 1 3 7 0
3 3 2 f 4 7 7 8 1 8 2 4 1 3 7 0
4 2 2 d 2 c 1 a 5 4 9 0 d 4 6 c
5 8 0 0 1 5 7 2 3 c a b a 5 1 f
5 8 0 0 1 5 7 2 3 c a b a 5 1 f
CBC
5 c 0 5 c c 7 5 2 9 c c 3 b 0 0
4 7 f e 9 3 b 1 d 2 e 6 e 3 1 9
4 7 f e 9 3 b 1 d 2 e 6 e 3 1 9
8 c 9 f d 6 c a a 7 f e 3 d d e
9 a a e d a 1 2 1 9 b e d f e 5
9 a a e d a 1 2 1 9 b e d f e 5
d a 6 f 0 f d e 0 2 7 c d 5 e c
3 3 2 f 4 7 7 8 1 8 2 4 1 3 7 0
3 3 2 f 4 7 7 8 1 8 2 4 1 3 7 0
4 2 2 d 2 c 1 a 5 4 9 0 d 4 6 c
5 8 0 0 1 5 7 2 3 c a b a 5 1 f
5 8 0 0 1 5 7 2 3 c a b a 5 1 f
OFB
0 1 0 1 1 1 0 0 0 0 0 0 0 1 0 1
1 1 0 0 1 1 0 0 0 1 1 1 0 1 0 1
0 0 1 0 1 0 0 1 1 1 0 0 1 1 0 0
0 0 1 1 1 0 1 1 0 0 0 0 0 0 0 0
0 1 0 0 0 1 1 1 1 1 1 1 1 1 1 0
1 0 0 1 0 0 1 1 1 0 1 1 0 0 0 1
1 1 0 1 0 0 1 0 1 1 1 0 0 1 1 0
1 1 1 0 0 0 1 1 0 0 0 1 1 0 0 1
1 1 0 0 1 1 0 0 0 1 1 1 0 1 0 1
0 0 1 0 1 0 0 1 1 1 0 0 1 1 0 0
0 0 1 1 1 0 1 1 0 0 0 0 0 0 0 0
0 1 0 0 0 1 1 1 1 1 1 1 1 1 1 0
1 0 0 1 0 0 1 1 1 0 1 1 0 0 0 1
1 1 0 1 0 0 1 0 1 1 1 0 0 1 1 0
1 1 1 0 0 0 1 1 0 0 0 1 1 0 0 1
1 0 0 0 1 1 0 0 1 0 0 1 1 1 1 1
1 1 0 1 0 1 1 0 1 1 0 0 1 0 1 0
1 0 1 0 0 1 1 1 1 1 1 1 1 1 1 0
0 0 1 1 1 1 0 1 1 1 0 1 1 1 1 0
1 0 0 1 1 0 1 0 1 0 1 0 1 1 1 0
1 1 0 1 1 0 1 0 0 0 0 1 0 0 1 0
0 0 0 1 1 0 0 1 1 0 1 1 1 1 1 0
1 1 0 1 1 1 1 1 1 1 1 0 0 1 0 1
1 1 0 1 0 1 1 0 1 1 0 0 1 0 1 0
1 0 1 0 0 1 1 1 1 1 1 1 1 1 1 0
0 0 1 1 1 1 0 1 1 1 0 1 1 1 1 0
1 0 0 1 1 0 1 0 1 0 1 0 1 1 1 0
1 1 0 1 1 0 1 0 0 0 0 1 0 0 1 0
0 0 0 1 1 0 0 1 1 0 1 1 1 1 1 0
1 1 0 1 1 1 1 1 1 1 1 0 0 1 0 1
1 1 0 1 1 0 1 0 0 1 1 0 1 1 1 1
0 0 0 0 1 1 1 1 1 1 0 1 1 1 1 0
0 0 0 0 0 0 1 0 0 1 1 1 1 1 0 0
1 1 0 1 0 1 0 1 1 1 1 0 1 1 0 0
0 0 1 1 0 0 1 1 0 0 1 0 1 1 1 1
0 1 0 0 0 1 1 1 0 1 1 1 1 0 0 0
0 0 0 1 1 0 0 0 0 0 1 0 0 1 0 0
0 0 0 1 0 0 1 1 0 1 1 1 0 0 0 0
0 0 0 0 1 1 1 1 1 1 0 1 1 1 1 0
0 0 0 0 0 0 1 0 0 1 1 1 1 1 0 0
1 1 0 1 0 1 0 1 1 1 1 0 1 1 0 0
0 0 1 1 0 0 1 1 0 0 1 0 1 1 1 1
0 1 0 0 0 1 1 1 0 1 1 1 1 0 0 0
0 0 0 1 1 0 0 0 0 0 1 0 0 1 0 0
0 0 0 1 0 0 1 1 0 1 1 1 0 0 0 0
0 1 0 0 0 0 1 0 0 0 1 0 1 1 0 1
0 0 1 0 1 1 0 0 0 0 0 1 1 0 1 0
0 1 0 1 0 1 0 0 1 0 0 1 0 0 0 0
1 1 0 1 0 1 0 0 0 1 1 0 1 1 0 0
0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0
0 0 0 1 0 1 0 1 0 1 1 1 0 0 1 0
0 0 1 1 1 1 0 0 1 0 1 0 1 0 1 1
1 0 1 0 0 1 0 1 0 0 0 1 1 1 1 1
0 0 1 0 1 1 0 0 0 0 0 1 1 0 1 0
0 1 0 1 0 1 0 0 1 0 0 1 0 0 0 0
1 1 0 1 0 1 0 0 0 1 1 0 1 1 0 0
0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0
0 0 0 1 0 1 0 1 0 1 1 1 0 0 1 0
0 0 1 1 1 1 0 0 1 0 1 0 1 0 1 1
1 0 1 0 0 1 0 1 0 0 0 1 1 1 1 1
CFB
5 c 0 5 c c 7 5 2 9 c c 3 b 0 0
4 7 f e 9 3 b 1 d 2 e 6 e 3 1 9
4 7 f e 9 3 b 1 d 2 e 6 e 3 1 9
8 c 9 f d 6 c a a 7 f e 3 d d e
9 a a e d a 1 2 1 9 b e d f e 5
9 a a e d a 1 2 1 9 b e d f e 5
d a 6 f 0 f d e 0 2 7 c d 5 e c
3 3 2 f 4 7 7 8 1 8 2 4 1 3 7 0
3 3 2 f 4 7 7 8 1 8 2 4 1 3 7 0
4 2 2 d 2 c 1 a 5 4 9 0 d 4 6 c
5 8 0 0 1 5 7 2 3 c a b a 5 1 f
5 8 0 0 1 5 7 2 3 c a b a 5 1 f
CTR
0 1 0 1 1 1 0 0 0 0 0 0 0 1 0 1
1 1 0 0 1 1 0 0 0 1 1 1 0 1 0 1
0 0 1 0 1 0 0 1 1 1 0 0 1 1 0 0
0 0 1 1 1 0 1 1 0 0 0 0 0 0 0 0
0 1 0 0 0 1 1 1 1 1 1 1 1 1 1 0
1 0 0 1 0 0 1 1 1 0 1 1 0 0 0 1
1 1 0 1 0 0 1 0 1 1 1 0 0 1 1 0
1 1 1 0 0 0 1 1 0 0 0 1 1 0 0 1
1 1 0 0 1 1 0 0 0 1 1 1 0 1 0 1
0 0 1 0 1 0 0 1 1 1 0 0 1 1 0 0
0 0 1 1 1 0 1 1 0 0 0 0 0 0 0 0
0 1 0 0 0 1 1 1 1 1 1 1 1 1 1 0
1 0 0 1 0 0 1 1 1 0 1 1 0 0 0 1
1 1 0 1 0 0 1 0 1 1 1 0 0 1 1 0
1 1 1 0 0 0 1 1 0 0 0 1 1 0 0 1
1 0 0 0 1 1 0 0 1 0 0 1 1 1 1 1
1 1 0 1 0 1 1 0 1 1 0 0 1 0 1 0
1 0 1 0 0 1 1 1 1 1 1 1 1 1 1 0
0 0 1 1 1 1 0 1 1 1 0 1 1 1 1 0
1 0 0 1 1 0 1 0 1 0 1 0 1 1 1 0
1 1 0 1 1 0 1 0 0 0 0 1 0 0 1 0
0 0 0 1 1 0 0 1 1 0 1 1 1 1 1 0
1 1 0 1 1 1 1 1 1 1 1 0 0 1 0 1
1 1 0 1 0 1 1 0 1 1 0 0 1 0 1 0
1 0 1 0 0 1 1 1 1 1 1 1 1 1 1 0
0 0 1 1 1 1 0 1 1 1 0 1 1 1 1 0
1 0 0 1 1 0 1 0 1 0 1 0 1 1 1 0
1 1 0 1 1 0 1 0 0 0 0 1 0 0 1 0
0 0 0 1 1 0 0 1 1 0 1 1 1 1 1 0
1 1 0 1 1 1 1 1 1 1 1 0 0 1 0 1
1 1 0 1 1 0 1 0 0 1 1 0 1 1 1 1
0 0 0 0 1 1 1 1 1 1 0 1 1 1 1 0
0 0 0 0 0 0 1 0 0 1 1 1 1 1 0 0
1 1 0 1 0 1 0 1 1 1 1 0 1 1 0 0
0 0 1 1 0 0 1 1 0 0 1 0 1 1 1 1
0 1 0 0 0 1 1 1 0 1 1 1 1 0 0 0
0 0 0 1 1 0 0 0 0 0 1 0 0 1 0 0
0 0 0 1 0 0 1 1 0 1 1 1 0 0 0 0
0 0 0 0 1 1 1 1 1 1 0 1 1 1 1 0
0 0 0 0 0 0 1 0 0 1 1 1 1 1 0 0
1 1 0 1 0 1 0 1 1 1 1 0 1 1 0 0
0 0 1 1 0 0 1 1 0 0 1 0 1 1 1 1
0 1 0 0 0 1 1 1 0 1 1 1 1 0 0 0
0 0 0 1 1 0 0 0 0 0 1 0 0 1 0 0
0 0 0 1 0 0 1 1 0 1 1 1 0 0 0 0
0 1 0 0 0 0 1 0 0 0 1 0 1 1 0 1
0 0 1 0 1 1 0 0 0 0 0 1 1 0 1 0
0 1 0 1 0 1 0 0 1 0 0 1 0 0 0 0
1 1 0 1 0 1 0 0 0 1 1 0 1 1 0 0
0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0
0 0 0 1 0 1 0 1 0 1 1 1 0 0 1 0
0 0 1 1 1 1 0 0 1 0 1 0 1 0 1 1
1 0 1 0 0 1 0 1 0 0 0 1 1 1 1 1
0 0 1 0 1 1 0 0 0 0 0 1 1 0 1 0
0 1 0 1 0 1 0 0 1 0 0 1 0 0 0 0
1 1 0 1 0 1 0 0 0 1 1 0 1 1 0 0
0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0
0 0 0 1 0 1 0 1 0 1 1 1 0 0 1 0
0 0 1 1 1 1 0 0 1 0 1 0 1 0 1 1
1 0 1 0 0 1 0 1 0 0 0 1 1 1 1 1
(*) In the background, the same cleartext is encrypted and decrypted with each mode, the visible ciphertext is created using AES128-CBC and acts as a stand-in. Clicking a hex number will always flip the last bit of the 4 bits it represents in each ciphertext.