Text & writing
Add line numbers
Add line numbers: Prefix each line with its 1-based line number
Home / Categories / Text & writing
Text & writing
Choose a tool. The method, example and assumptions are included.
Text & writing
Caesar cipher and ROT13
Caesar cipher and ROT13 locally in your browser, with clear input requirements, a worked example and an explanation of the result.
Text & writing
Find and replace
Find and replace: Literal, case-sensitive global replacement. Regular expressions are not executed.
Text & writing
NATO phonetic alphabet translator
NATO phonetic alphabet translator locally in your browser, with clear input requirements, a worked example and an explanation of the result.
Text & writing
Number to English words
Number to English words: Split the integer into three-digit groups through quadrillions, spell each group in English, and read fractional digits individually after “point”.
Text & writing
Remove duplicate lines
Remove duplicate lines: Keep the first occurrence of each exact, case-sensitive line; preserve order
Text & writing
Reverse line order
Reverse line order: Reverse newline-delimited lines without changing line contents
Text & writing
Reverse text
Reverse text: Reverse Unicode code points; combining sequences may separate
Text & writing
Sort lines
Sort lines: Sort lines in Unicode code-unit order; case-sensitive
Text & writing
Text case converter
Text case converter: Apply Unicode upper/lower case, or uppercase each word’s first letter
Text & writing
Text comparison
Text comparison: Compare exact Unicode strings; report first differing code-point position
Text & writing
Unicode inspector
Unicode inspector: List code points in hexadecimal; maximum 1,000 code points
Text & writing
Unicode text normalization
Unicode text normalization locally in your browser, with clear input requirements, a worked example and an explanation of the result.
Text & writing
URL slug generator
URL slug generator: Normalize accents, lowercase, replace non-ASCII-alphanumeric runs with hyphens
Text & writing
Whitespace cleanup
Whitespace cleanup: Trim leading/trailing whitespace and replace internal whitespace runs with one space
Text & writing
Word and character count
Word and character count: Count whitespace-delimited words and Unicode code points
Text & writing
Word frequency counter
Word frequency counter locally in your browser, with clear input requirements, a worked example and an explanation of the result.