Eoyc

    Text Transformations

    Text transformation encoders modify text in various ways without encoding to different formats.

    rot13

    ROT13 (Rotate by 13 places) is a simple letter substitution cipher that replaces each letter with the letter 13 positions after it in the alphabet.

    Usage

    echo "hello" | eoyc -e "rot13"
# Output: uryyb

    How It Works

    • A-Z → N-ZA-M
    • a-z → n-za-m
    • Numbers and special characters remain unchanged

    Decoding

    Apply ROT13 twice to get back the original:

    echo "uryyb" | eoyc -e "rot13"
# Output: hello

    Examples

    echo "secret message" | eoyc -e "rot13"
# Output: frperg zrffntr

echo "ROT13 Example" | eoyc -e "rot13"
# Output: EBG13 Rknzcyr

    upcase

    Converts all text to uppercase.

    Usage

    echo "hello world" | eoyc -e "upcase"
# Output: HELLO WORLD

    Examples

    echo "test123" | eoyc -e "upcase"
# Output: TEST123

echo "Mixed Case Text" | eoyc -e "upcase"
# Output: MIXED CASE TEXT

    downcase

    Converts all text to lowercase.

    Usage

    echo "HELLO WORLD" | eoyc -e "downcase"
# Output: hello world

    Examples

    echo "TEST123" | eoyc -e "downcase"
# Output: test123

echo "Mixed Case Text" | eoyc -e "downcase"
# Output: mixed case text

    reverse

    Reverses the order of characters in the text.

    Usage

    echo "hello" | eoyc -e "reverse"
# Output: olleh

    Examples

    echo "Hello World" | eoyc -e "reverse"
# Output: dlroW olleH

echo "12345" | eoyc -e "reverse"
# Output: 54321

    Double Reverse

    echo "test" | eoyc -e "reverse>reverse"
# Output: test (back to original)

    redacted

    Aliases: redaction

    Replaces all characters with block characters (◼) to redact sensitive information.

    Usage

    echo "sensitive data" | eoyc -e "redacted"
# Output: ◼◼◼◼◼◼◼◼◼◼◼◼◼◼

    Examples

    echo "password123" | eoyc -e "redacted"
# Output: ◼◼◼◼◼◼◼◼◼◼◼

echo "credit card: 1234-5678-9012-3456" | eoyc -s "1234-5678-9012-3456" -e "redacted"
# Output: credit card: ◼◼◼◼◼◼◼◼◼◼◼◼◼◼◼◼◼◼◼

    Use Cases

    • Log sanitization
    • Data anonymization
    • Privacy compliance
    • Demo/screenshot preparation

    Combining Text Transformations

    Text transformations work great in chains:

    # Uppercase then reverse
echo "hello" | eoyc -e "upcase>reverse"
# Output: OLLEH

# ROT13 then uppercase
echo "secret" | eoyc -e "rot13>upcase"
# Output: FRPERG

# Reverse then ROT13
echo "test" | eoyc -e "reverse>rot13"
# Output: gfxr

# URL encode then uppercase
echo "test data" | eoyc -e "url>upcase"
# Output: TEST%20DATA

    Practical Examples

    Case Normalization

    # Normalize emails to lowercase
cat emails.txt | eoyc -e "downcase"

    Obfuscation

    # Simple obfuscation using ROT13
echo "hint" | eoyc -e "rot13"

    Data Sanitization

    # Redact sensitive patterns
cat logs.txt | eoyc -r '\d{3}-\d{2}-\d{4}' -e "redacted"