Trawl

20 tools for a CTF challenge, running at once, in this tab. Nothing is uploaded.

or drop one anywhere, or paste from the clipboard

Cuttlefish

Runs on an image or a sound file
  • LSB sweep Tries every way of reading hidden bits idle
  • Bit-plane wall Shows each layer of bits as a picture idle
  • Chi-square attack Statistical test for a hidden payload idle
  • RS analysis Second opinion on how much is hidden idle
  • Spectrogram Draws the sound, in case a picture is hiding in it idle
  • Audio LSB sweep Hidden bits in the samples of a sound file idle
  • JSteg sweep Reads hidden bits out of a JPEG after compression idle
  • Palette Repeated colours that carry hidden bits idle

Survey

Runs on any file you drop
  • Flag scan Looks for flag{...} text in the file idle
  • Embedded files Finds files hidden inside this one, and saves them idle
  • Metadata Camera details and notes saved with the photo idle
  • Entropy window Finds compressed or encrypted regions idle
  • Chunk walk Lists every part of the file idle
  • Readable text Text anywhere in the file, plain or wide idle
  • Archive entries Reads a ZIP twice and reports where the two copies disagree idle
  • PDF structure Walks a PDF for every object, and what the index leaves out idle
  • Binary structure Reads what an ELF or PE declares, down to its own defences idle
  • Registry hive Reads which USB stick a Windows hive remembers, and when idle

Mantis

Runs on a string you paste
  • Encoding peeler Unwraps base64, hex, morse and ten more, layer by layer idle
  • Caesar solver Tries every shift and keeps the one that reads idle

No upload, no account, no telemetry. Works offline after the first load.