[guytv]

If you take the UTF-8 binary for “hello world” and paste it there, it passes 4 out of 5 randomness tests.

Strange.

(0110100001100101011011000110110001101111001000000111011101101111011100100110110001100100)

[Antibabelic]

It is very easy for short strings to pass most of the tests.

[dominicrose]

Yes I tried with PHP and it failed with a size of 8800 for the Block Frequency Test, but it was fine at 880. Then I tried another random sequence of 8800 and it also failed the Autocorrelation Test.

[cnnlives9099]

It looks like there is some repetition in the binary representation to me. English language phrases in UTF-8 are not going to look random.