Text Encrypt/Decrypt

ROT13

A simple letter substitution cipher that shifts each letter by 13 positions in the alphabet. It's symmetric, meaning applying ROT13 twice returns the original text. Commonly used for spoiler protection and simple text obfuscation.

Example: "Hello" → "Uryyb"

Base64 Encode/Decode

Converts text to Base64 format, which represents binary data in ASCII string format using 64 characters (A-Z, a-z, 0-9, +, /). Widely used for encoding data in emails, URLs, and data URIs.

Example: "Hello" → "SGVsbG8="

Base64 URL-Safe

A variant of Base64 that uses URL-safe characters (- and _ instead of + and /). Perfect for encoding data in URLs and filenames without special character issues.

Example: "Hello" → "SGVsbG8" (no padding)

Base32

Uses only uppercase letters A-Z and digits 2-7, making it case-insensitive and easier to communicate verbally. Commonly used in TOTP (authenticator apps) and some file systems.

Example: "Hello" → "JBSWY3DP"

Binary

Converts text to binary representation (0s and 1s). Each character is represented by its 8-bit binary code. Useful for understanding how computers store text.

Example: "Hi" → "01001000 01101001"

Transformation History

Automatically saves your last 10 transformations in browser localStorage. Click any history item to reload it instantly. Perfect for comparing different encoding methods or retrieving previous work.

Swap Function

Quickly reverse input and output with one click. Useful for decryption workflows where you want to decode the output and encode it again with a different method.

Export Options

Export your transformed text as a .txt file or save your entire transformation history as a .json file for record keeping or sharing with team members.

Keyboard Shortcuts

Speed up your workflow with keyboard shortcuts: Ctrl+Enter to transform text, and Ctrl+C to copy output when the output panel is focused.

Use ROT13 When:

• You need simple, reversible text obfuscation
• Hiding spoilers in forums or discussions
• Creating puzzles or games
• You want human-readable output (still letters)

Use Base64 When:

• Encoding binary data for text-only systems
• Creating data URIs for images
• Encoding email attachments
• Storing binary data in JSON or XML
• Working with APIs that require Base64

Error: Invalid Base64 string

The input contains characters not valid in Base64. Make sure you're decoding actual Base64-encoded text.

Error: Invalid characters for Base64 encoding

The input contains special Unicode characters that can't be directly encoded. The tool handles this automatically using UTF-8 encoding.

Error: Invalid Base32 string

Base32 only accepts uppercase letters A-Z and digits 2-7. Check your input for invalid characters.

ROT13 Implementation

Uses character code manipulation to shift letters by 13 positions. Non-alphabetic characters remain unchanged. Case is preserved.

Base64 Implementation

Uses browser's native btoa() and atob() functions with UTF-8 encoding support via encodeURIComponent/decodeURIComponent.

Base32 Implementation

Follows RFC 4648 standard. Converts text to binary, then groups into 5-bit chunks mapped to the Base32 alphabet.

Binary Implementation

Converts each character to its 8-bit binary representation using charCodeAt() and toString(2).