STEGO

drop any image // find out if something is hiding inside

drop image here or click to browse
PNG · JPEG · WebP · GIF

// what the tests look for

[format] lossless or lossy · compression history · JPEG quality estimate
[chi_square] pixel value pair distribution · detects LSB replacement
[lsb_entropy] bit-plane randomness · stego LSBs are suspiciously uniform
[sample_pairs] adjacent pixel correlation · LSB matching leaves a fingerprint
[block_var] 8×8 block mean distribution · detects block-average encoding
[dct_chi2] JPEG DCT AC coefficient pairs · catches OutGuess / F5 / JPHide · Cicada 3301
[our_scheme] Almond Farm block-average v1 · magic + CRC verification