CyberChef: A Beginner's Guide
🔐 Getting Started with CyberChef: A Beginner's Guide
CyberChef is like a Swiss Army knife for data. It’s a free, web-based tool that helps you perform different operations like encoding, decoding, encryption, and data extraction — all in your browser.
Let’s dive into how to use CyberChef step by step, with simple explanations and practice tasks!
🚀 What is CyberChef?
CyberChef is a web-based tool designed to help with various cybersecurity and data transformation tasks. It uses recipes, which are a list of steps you apply to your data.
👨🏫 What You'll Learn:
What CyberChef is
How to use its interface
Common operations
How to build and use recipes
🌐 How to Access CyberChef
You can use CyberChef in two simple ways:
1. Online Access
Just open CyberChef in your browser – no installation needed.
2. Offline Access
Download the latest stable version from the official GitHub page. It works on both Windows and Linux.
🖥️ Navigating the CyberChef Interface
CyberChef has 4 main areas:
🔧 Operations
Find tools like Base64, ROT13, URL Encode, etc. Use the search bar or browse categories.
🧪 Recipe
Drag and drop operations here to create your recipe. You can:
Save, load, or clear recipes
Click BAKE! to process
Enable Auto Bake to process automatically
✍️ Input
Paste, type, or upload data here. You can:
Add new input tabs
Open a file or folder
Clear inputs or reset layout
📤 Output
See the result of your recipe here. You can:
Save the output
Copy it to clipboard
Replace input with output
Maximize the pane for easier viewing
🧠 The CyberChef Thought Process
Before jumping in, follow these 4 simple steps:
1. Set Your Goal
Ask: What do I want to achieve?
Example: “I found a strange string. I want to find out if it hides a secret message.”
2. Add Your Data
Paste or upload the gibberish string into the Input Area.
3. Choose Operations
Try tools like ROT13, Base64, or URL Decode under Encryption/Encoding.
4. Check the Output
Did you get what you wanted?
✅ Yes: You’re done!
❌ No: Go back and try a different method.
Repeat the cycle until you succeed!
🔬 Practice Makes Perfect
📥 Download the Task File
Click the Download Task Files button in the challenge room and open it in CyberChef using the input section.
🔍 Useful Operation Categories
1. Extractors
| Operation | Description |
| Extract IP addresses | Finds all IPv4/IPv6 addresses |
| Extract URLs | Finds all links (http, https, etc.) |
| Extract email addresses | Finds emails like example@domain.com |
Use these to quickly find useful data hidden in large text!
2. Date & Time
| Operation | Description |
| From UNIX Timestamp | Converts timestamp to readable date |
| To UNIX Timestamp | Converts readable date to timestamp |
UNIX Timestamp Example:
"Fri Sep 6 20:30:22 +04 2024" →1725654622
3. Data Format / Base Encoding
| Operation | Description | Example |
| From Base64 | Decodes Base64 to normal text | V2VsY... → Welcome... |
| URL Decode | Turns %2F, %3A, etc., into /, : | %3A → : |
| From Base85 | Decodes Base85 | BOu!... → hello world |
| From Base58 | Decodes Base58 | AXLU7qR → Thm58 |
| To Base62 | Converts data to Base62 format | Thm62 → 6NiRkOY |
🔠 How Base64 Encoding Works (Manual Breakdown)
Let’s convert “THM” to Base64 by hand:
Step 1: Convert to Binary
T = 01010100
H = 01001000
M = 01001101
Merged: 010101000100100001001101
Step 2: Split into 6-Bit Chunks
010101 → 21000100 → 4100001 → 33001101 → 13
Step 3: Find Base64 Characters
From the Base64 index:
| Decimal | Character |
| 21 | V |
| 4 | E |
| 33 | h |
| 13 | N |
✅ THM → VEhN in Base64
🌐 Common URL Encoded Characters
| Character | Encoded |
: | %3A |
/ | %2F |
. | %2E |
= | %3D |
# | %23 |
Use URL Decode to convert them back.
🧠 Practical Task
Download the task file.
Open it in CyberChef.
Use Extractors to answer the first two questions.
Try it without hints first — practice builds confidence!
That’s it! You’ve now got a strong understanding of how to use CyberChef effectively. Keep exploring, experimenting, and baking!
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