CyberChef

A cyber Swiss Army Knife - An online web app for a load of different operations and tools. Its designed to enable both technical and non-technical analysts to manipulate data in complex ways without having to deal with complex tools or algorithms. https://gchq.github.io/CyberChef/

dCode.fr

A broad collection of tools for ciphers, codes, and data analysis. Useful for solving crypto, stego, and logic puzzles. It even has a Cipher Identifier to help you identify unknown codes and ciphers. https://www.dcode.fr/en https://www.dcode.fr/cipher-identifier https://www.dcode.fr/symbols-ciphers

Hexed.it

Hexed.it is an online hex editor. You can upload a file and view the raw bytes and modify them. This allows you to fix broken files, identify embedded or hidden files, and see hidden data. https://hexed.it/

RapidTables Converter

An online conversion tool that will convert given text into ASCII, Binary, Decimal and Base64. https://www.rapidtables.com/convert/number/ascii-hex-bin-dec-converter.html

Crackstation

An online tool that can be used to crack known password of MD5 and SHA1 hashes. http://crackstation.net/

Aperi'Solve

Aperi'Solve is an online platform that will perform multiple analysis's on an image to assist in Steganography. Any image uploaded will be analysed using layer analysis as well as "zsteg", "steghide", "outguess", "exiftool", "binwalk", "foremost" and "strings". https://www.aperisolve.com/

Forensically

A set of free tools for digital image forensics. Allows for more exact control and modification of the image and tools when compared to aperisolve. https://29a.ch/photo-forensics

DogBolt — Decompiler Explorer

An online binary file decompiler that compares output from tools like Ghidra and BinaryNinja. For reverse engineering binaries. https://dogbolt.org/

Forensically

A forensic analysis tool to extract data from images has many features like Magnifier, Clone Detection, Error Level analysis, Noise Analusis, level Sweep, Meta Data, Geo tags, Thumbnail Analysis , JPEG Analysis, Strings Extraction. https://29a.ch/photo-forensics/

TryItOnline

Online tool that allows you to run code in a sandboxed window. Has a large number of options including esoteric languages. https://tio.run/#

Regex101

Online tool for testing and running regex strings on a piece of text. Allows for more accuracy and control over the regex expression than other tools https://regex101.com/

Beautifier.io

Makes obfuscated or formatted code more human readable. https://beautifier.io/

DeObfuscate.io

Deobfuscates JavaScript code to make it readable and understandable. https://deobfuscate.io/

JSFiddle

Runs JavaScript code in a sandboxed browser environment for testing and debugging. https://jsfiddle.net/

JWT.io

Analyzes and decodes JWT tokens for inspection and debugging. https://jwt.io/

TIO.run

Executes code online in various languages, useful for testing potentially malicious scripts safely. https://tio.run/#

Webhook.site

Webhook.site generates free, unique URLs and e-mail addresses and lets you see everything that’s sent to it. This is extremely useful for creating a quick and simple C2 (command and control) server for exploits https://webhook.site