Tools
Tools I use, free for you too.
Radio and software-defined-radio maths I reach for constantly.
Antenna Length Calculator
Cut a quarter-wave, dipole or 5/8-wave element for any frequency.
open →Wavelength and Frequency Converter
Turn a frequency into its wavelength, or the other way round.
open →dBm to Watt Converter
Move between dBm, mW, W, dBW and dBµV without thinking.
open →Free-Space Path Loss Calculator
Signal loss over distance and frequency, plus the received level.
open →LoRa Range and Link Budget Calculator
How far a LoRa link reaches, from power, gains, SF and environment.
open →LoRa Airtime (Time on Air) Calculator
Exact time on air and duty-cycle headroom for a LoRa packet.
open →EIRP and ERP Calculator
Radiated power from TX power, antenna gain and feedline loss.
open →Radio Horizon and Line-of-Sight Calculator
Maximum line-of-sight range from two antenna heights.
open →Fresnel Zone Calculator
First Fresnel zone radius and the clearance a link needs.
open →Doppler Shift Calculator
Frequency shift for a moving transmitter or receiver.
open →VSWR and Return Loss Calculator
Convert VSWR, return loss, reflection and mismatch loss.
open →The little byte-wrangling tools you keep open during a pwn.
Hexdump / Hex Viewer
Turn text, hex or base64 into a clean xxd-style hexdump.
open →Cyclic Pattern Generator and Offset Finder
De Bruijn pattern for finding the exact buffer overflow offset.
open →Shellcode and Byte String Formatter
Convert bytes between hex, \x escapes, C array, python and base64.
open →Number Base Converter (hex, dec, binary)
Convert between bases, with two's complement and byte swap.
open →XOR Calculator
XOR data against a repeating key, in hex or text.
open →Check, generate and clean up, all in your browser.
Password Strength Checker
Entropy and estimated crack time, worked out in your browser.
open →Secure Password Generator
Strong random passwords, generated locally, never sent anywhere.
open →Passphrase Generator (Diceware Style)
Memorable multi-word passphrases with real entropy.
open →Pwned Password Check
See if a password appears in known breaches, without leaking it.
open →EXIF Viewer and Remover
See the metadata in a photo, including GPS, and strip it out.
open →> more on the way. Want a specific one? tell me
