Text Tools

Sentence Case Converter

Turn ALL CAPS or Title Case text into sentence case: lowercase every word, capitalise each sentence start and I, and keep acronyms like NASA intact.

Lowercase Converter

Convert text to lowercase with Unicode case rules, an option to keep acronyms like NASA, and Turkish dotless ı handling. Counts how many letters changed.

Uppercase Converter

Turn any text into capital letters with Unicode case rules, including ß to SS and an option for the Turkish dotted İ. Shows letters changed.

Case Converter

Change text to upper, lower, title or sentence case, or to camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE, with a preview of all ten styles.

Title Case Converter

Convert headlines and book titles to title case under Chicago or AP/APA rules, keeping acronyms such as NASA intact and minor words like of and the lowercase.

AI API Cost Calculator

Estimate what an LLM API costs per request, day, month and year from input and output prices per million tokens, with the output share of spend.

AI Chat Cost Calculator

Estimate what a chatbot costs on a token-priced API: enter tokens per message and the input and output price per million tokens to see daily.

AI GPT Token Counter

Estimate how many GPT tokens a prompt uses from its characters and words, using OpenAI's 4-characters-per-token rule, and see how much of a limit it fills.

AI Cost Calculator

Estimate the monthly bill for a language-model API from tokens per request, request volume and per-million input and output token prices.

AI Token Counter

Estimate how many tokens a prompt uses with the 4-characters and 75-words rules, and see what share of a 128,000-token context window it fills.

Remove Tabs

Replace tab characters with one space, pad them to 1–16 column tab stops like the Unix expand command, or delete them, with a count of tabs found.

Remove Duplicate Words

Strip repeated words from text, either every later repeat or only doubled words like 'the the', with a table of which words were removed and how often.

Remove Whitespace

Strip extra spaces, tabs, blank lines or every whitespace character from pasted text, with a count of how many characters were taken out.

Remove Duplicate Lines

Delete repeated lines from a list while keeping the first copy of each in its original position, with case-insensitive and trimmed matching options.

Remove Spaces

Strip double spaces, every space, or spaces plus line breaks from pasted text. Shows how many characters were removed and handles no-break spaces.

Underline Text Generator

Turn plain text into underlined text you can paste anywhere, using combining marks such as U+0332 low line. Five styles, with spaces on or off.

Mirror Text Generator

Turn text into mirror writing: characters reversed and letters such as b, R and E replaced by Unicode look-alikes that face the other way.

Invisible Character Generator

Make blank text from Hangul filler, Braille blank, zero width space and more, or hide characters inside a word. Shows the code point and UTF-8 bytes.

Invisible Text Generator

Make blank text from Braille blank U+2800, Hangul filler U+3164, zero width or no-break spaces, repeated up to 2000 times, with UTF-8 byte size.

Zero Width Character

Detect and strip zero width spaces, joiners, word joiners and BOMs hidden in pasted text, or generate up to 500 invisible characters to copy.

Text Splitter

Split long text into equal parts by character count, word count or line count, or at any separator such as a comma, with each part's length listed.

Repeat Text

Repeat any text up to 1000 times, separated by new lines, spaces, commas or nothing, with a live count of characters, words and lines in the output.

Text Replicator

Repeat a word, line or paragraph up to 1,000 times, joined by new lines, blank lines, spaces, commas or nothing, with character and word totals.