Compute Shannon entropy per 256-byte chunk to detect encrypted regions, packed binaries, or hidden data.
Free is enough for most one-off jobs. Pro raises the file and batch caps; Pro + Media unlocks GB-scale streaming and unlimited duration.
Larger files supported on Developer (5 GB CSV) and Enterprise (unlimited). All processing happens in your browser — files never reach a server.
Drop any file.
Shannon entropy is computed per 256-byte chunk and rendered as an interactive chart.
High-entropy regions (>7.5 bits/byte) are flagged as likely encrypted, compressed, or packed.
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Random data scores ~8.0 bits/byte. Plain text scores ~4-5. >7.5 strongly suggests encryption or compression.
Packed / encrypted malware often shows high-entropy sections — this is a useful triage signal, not a definitive verdict.