A cross-platform tool that use Certificates Transparency logs to find subdomains. We currently support Linux, Windows and MacOS. How it works? It tool doesn’t use the common methods for sub(domains) discover, the tool uses Certificate Transparency logs to find subdomains and it method make it tool very faster and reliable. If you want to know more about Certificate Transparency logs, read Installation Linux If you want to install it, you can do that manually compiling the source or using the precompiled binary. Manually: You need to have Rust installed in your computer first. $ git clone $ cd findomain $ cargo build –release $ sudo cp target/release/findomain /usr/bin/ $ findomain Using the binary: $ git clone $ sudo cp findomain/bin/findomain /usr/bin $ findomain If you are using the BlackArch Linux distribution, you just need to use: $ sudo pacman -S findomain Installation Windows Download the binary from and use it. Installation MacOS Download the binary from and use it. Usage You can use the tool in two ways, only discovering the domain name or discovering the domain + the IP address. findomain 0.1.3 Eduard Tolosa A tool that use Certificates Transparency logs to find subdomains. USAGE: findomain [FLAGS] [OPTIONS] FLAGS: -h, –help Prints help information -i, –get-ip Return the subdomain list with IP address if resolved. -V, –version Prints version information OPTIONS: -f, –file Sets the input file to use. -o, –output Write data to output file in the specified format. [possible values: txt, csv, json] -t, –target Target host Features Discover subdomains without brute-force, it tool uses Certificate Transparency Logs. Discover subdomains with or without IP address according to user arguments. Read target from user argument (-t). Read a list of targets from file and discover their subdomains with or without IP and also write to output files per-domain if specified by the user, recursively. Write output to TXT file. Write output to CSV file. Write output to JSON file. Cross platform support: Linux, Windows, MacOS. Download Findomain