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TechFinity toolkit

LSB Steganography (PNG)

Hide or extract a message using least-significant-bit encoding. This tool runs server-side and requires PHP GD.

Notes:
  • Only PNG input is supported. Output is a new PNG file.
  • Capacity depends on image size. This tool uses 1 LSB per RGB channel (3 bits per pixel).
  • If you set a password, the message bytes are XOR-scrambled with a SHA-256-derived key. This is obfuscation, not strong encryption.