String Tools

Decode space-separated ASCII codes back into text.

Turn a Base64 string back into readable text.

Convert text into Base64, the ASCII-safe binary-to-text encoding.

Wrap BBCode markup as a quoted, escaped string literal.

Decode space-separated binary code points back into text.

Convert plain text into Unicode Mathematical Bold letters and digits.

Decode space-separated UTF-8 byte values back into text.

Center every line within a fixed-width column, padding both sides.

Convert text between Title Case, camelCase, snake_case, kebab-case, and more.

Check whether text reads the same forwards and backwards.

Collapse fixed-width columnar text back into a single flowing list of values.

Turn a single-column list of values into one comma-separated line.

Replace every comma in your text with any custom replacement string.

Turn a comma-separated list into a single-column list, one value per line.

Turn a comma-separated list into one item per line.

Replace every comma in your text with a single space.

Duplicate every consonant letter in text immediately after itself.

Remove every consonant letter from text, leaving only vowels and non-letters.

Replace every consonant letter in text with a chosen replacement character.

Count how many line breaks appear in text.

Turn any text into a palindrome by mirroring it onto itself.

Wrap CSV text as a quoted, escaped string literal.

Playfully sprinkle mild, family-friendly exclamations like 'Dang!' into your text.

Convert plain text into flowing Unicode Mathematical Script (cursive) letters.

Decode space-separated decimal Unicode code points back into text.

Strip accents and diacritical marks from letters, like café to cafe.

Convert space-separated numbers 1-26 back to their letters.

Convert standalone digit numbers (0-999) in text to spelled-out words.

List the letters that repeat in a piece of text, with counts.

Remove duplicate lines from text, keeping the first occurrence of each.

List the words in your text that repeat, with how many times each occurs.

Remove repeated words from text, keeping only the first occurrence of each.

Collapse runs of two or more spaces down to a single space.

List every regex match found in text, one per line.

Extract a substring using a start position and length.

Check what percentage of text matches the lorem-ipsum word pool.

Generate classic lorem-ipsum-style placeholder paragraphs.

Strip lorem-ipsum boilerplate sentences out of a block of text.

Strip fancy Unicode fonts (bold, italic, script, fullwidth) back to plain readable ASCII.

Keep only lines containing (or not containing) a search term.

Replace every literal occurrence of one text with another.

Add a light, randomized glitchy look to text with stray marks and lookalike letters.

Decode space-separated hexadecimal code points back into text.

Convert HTML entities back into their literal characters.

Escape HTML-significant characters so text renders literally.

Wrap HTML markup as a quoted, escaped string literal.

Prefix every line with a repeated indent unit, like two spaces or a tab, at a chosen depth.

Swap every letter's case: uppercase becomes lowercase and vice versa.

Convert plain text into Unicode Mathematical Italic letters.

Combine a list of lines into one delimited string.

Decode a quoted JSON string literal back to its original text.

Validate JSON, then wrap it as a quoted, escaped string literal.

Validate JSON and collapse it to a single-line string.

Distribute extra spaces evenly between words so every line hits an exact target width.

Pad every line with trailing spaces (or a custom character) so they all share the same width.

Pad text on the left to reach a target length.

Shift every letter backward by N positions in the alphabet, wrapping a to z.

Duplicate every letter in text, or every Nth letter, immediately after itself.

Wrap every occurrence of a chosen letter with a marker on both sides.

Shift every letter forward by N positions in the alphabet, wrapping z to a.

Randomly shuffle the letters within each word, leaving word boundaries in place.

Remove every occurrence of one or more specified letters from text.

Replace every occurrence of one letter with another, case-preserved.

Sort the letters within each word alphabetically, e.g. 'hello' becomes 'ehllo'.

Sum the alphabet position of every letter in your text (a=1, b=2, ... z=26).

Randomly swap two adjacent interior letters in longer words to simulate a common typo pattern.

Insert a chosen symbol between every character of your text.

Wrap every non-space character in your text with a symbol pair.

Convert each letter to its 1-based alphabet position number (a=1 ... z=26).

Insert a newline every N characters or every N words, whichever mode you choose.

Replace the blank line between paragraphs with a decorative separator symbol like ⸻.

Convert CRLF and lone CR line endings to LF, and collapse 3+ blank lines down to just one.

Randomly insert line breaks at word boundaries, each gap becoming a break with a given probability.

Remove every newline, joining what were separate lines with a chosen replacement string.

Replace every newline character with a custom replacement string of your choice.

Count how many lines a block of text has.

Prefix every line of text with its 1-based line number.

Strip a leading line-number prefix from every line of text.

Add a prefix to the start of every line in a block of text.

Wrap every individual line in your text with a quote character.

Shuffle the order of lines in your text, keeping each line's own text intact.

Add a suffix to the end of every line in a block of text.

Remove a fixed suffix from the end of every line, only where it's actually present.

Strip a quote character from both sides of every quoted line.

Join soft-wrapped lines back into flowing paragraphs, preserving paragraph breaks.

Decode International Morse code back into text.

Translate text to International Morse code.

Decode a length-prefixed netstring back to plain text.

Wrap text as a length-prefixed netstring.

Turn a one-item-per-line list into a comma-separated line.

Join multi-line text into a single space-separated line.

Convert spelled-out English numbers (0-999) in text to digit form.

Decode space-separated octal code points back into text.

Keep only the paragraphs containing (or not containing) a keyword.

Shuffle the order of paragraphs in your text, keeping each paragraph intact.

Reverse the order of paragraphs in a block of text while keeping each paragraph's contents intact.

Sort the paragraphs of a text alphabetically, A-Z or Z-A.

Normalize spacing between paragraphs to exactly one blank line and trim leading/trailing blank lines.

Wrap every occurrence of any term from a comma-separated list with a marker.

Prepend text to the front of a string.

Substitute %s/%d/%f placeholders in a printf-style format string.

Capitalize the first letter of every sentence and lowercase the rest.

Wrap text in double quotes, escaping any quotes or control characters inside.

Insert one random lowercase letter at a random position inside each word of three or more letters.

Remove one random interior letter from every word of 4+ letters.

Generate a random string with a chosen length and character sets.

Randomly remove punctuation and symbol characters at a set rate.

Insert random filler words at random positions between the existing words in your text.

Randomly upper- and lowercase each letter, sPoNgEbOb-style.

Wrap every regular expression match with a marker string on both sides.

Generate a random sample string that matches a regex pattern.

Strip every blank or whitespace-only line from text.

Strip common punctuation marks from text.

Strip every space, tab, and newline from text.

Repeat text a chosen number of times, with an optional separator.

Flip a string's characters back to front.

Right-align every line within a fixed-width column using spaces.

Pad text on the right to reach a target length.

Apply the classic ROT13 letter-rotation cipher to text.

Shift printable ASCII characters by 47 places, a self-inverse cipher.

Cyclically shift a string's characters left or right by N positions.

Generate a self-contained HTML+CSS snippet that scrolls text horizontally.

Duplicate every sentence in a block of text immediately after itself.

Keep only the sentences containing (or not containing) a keyword.

Wrap every whole sentence containing a chosen keyword with a marker prefix/suffix.

Shuffle the order of sentences in your text, keeping each sentence intact.

Remove every sentence that contains a given keyword, case-insensitively, from a block of text.

Reverse the order of sentences in a paragraph while keeping each sentence intact.

Sort the sentences of a text alphabetically, A-Z or Z-A.

Backslash-escape quotes, backslashes, and newlines, C-style.

Resolve backslash escape sequences back to their literal characters.

Extract a substring using start/end index slicing (negative indices supported).

Convert text into a clean, URL-safe slug.

Sort a list of lines alphabetically, A-Z or Z-A.

Replace every space character in your text with a custom replacement string.

Replace every run of spaces in your text with a single comma.

Turn space-separated text into one item per line.

Replace runs of 4 spaces with tab characters.

Split text into a one-item-per-line list by a chosen delimiter.

List every overlapping pair of adjacent characters, one per line.

Count a string's characters, UTF-8 bytes, words, and lines.

Convert ASCII-only text to space-separated decimal ASCII codes.

Convert text to space-separated 8-bit binary code points.

Convert text to its actual UTF-8 byte values, space-separated.

Unwrap a quoted string literal back into raw CSV text.

Convert text to space-separated decimal Unicode code points.

Convert text to space-separated 2-digit hexadecimal code points.

Render plain text as a downloadable PNG image.

Convert every letter in a string to lowercase.

Convert text to space-separated 3-digit octal code points.

Convert every letter in a string to uppercase.

List every individual character in text, one per line.

Convert digits and a small set of letters into real Unicode subscript characters.

Append text to the end of a string.

Convert digits, letters, and a few symbols into real Unicode superscript characters.

Extract every symbol character in text and list each one with its count, sorted alphabetically.

Replace every tab character with 4 spaces.

Check whether a regex pattern matches text, with a total match count.

Transliterate Latin letters into a fullwidth or Cyrillic look-alike style.

Redact likely emails and long digit sequences with local pattern matching.

Draw a box-drawing-character border around text, sized to fit the longest line.

Arrange whitespace-separated values into fixed-width aligned columns.

Estimate a readability score and grade level from sentence and word length.

Calculate the Shannon entropy of your text in bits per character.

Introduce random typos into text at a configurable error rate.

Convert plain text into fancy Unicode letters: bold, italic, script, double-struck, or fullwidth.

Generate filler text that is exactly N characters long.

Generate a self-contained scrolling marquee banner as an HTML/CSS snippet.

Generate all contiguous N-word sequences (n-grams) from text, for any N.

Remove a fixed prefix from the start of a string, only if it's actually there.

Swap common words for a synonym using a small built-in dictionary.

Generate k-skip-n-grams: word sequences that allow skipped words between them.

Insert extra spaces between every character to visually widen your text.

Trim edges and collapse runs of spaces or tabs down to a single space.

Replace the space between each pair of words with a random number of spaces.

Get character, word, sentence, paragraph, and line counts in one summary.

Add a strikethrough effect to plain text using a Unicode combining overlay mark.

Make spaces, tabs, and newlines visible to spot trailing whitespace and hidden characters.

Underline plain text using the Unicode combining low line character.

Convert text into tiny, condensed Unicode characters popular on social media.

Capitalize headline text using standard English title-casing rules for minor words.

Find the most frequent letters in your text, ranked with their counts.

Find the most frequent words in your text, ranked with their counts.

Flip rows and columns of delimited text, like rotating a table 90 degrees.

Remove leading and trailing whitespace from a string.

Cut text to a max length, appending a suffix like '...' when trimmed.

Strip up to N leading copies of an indent unit, like two spaces or a tab, from every line.

List the letters that occur exactly once in a piece of text.

List the words in your text that occur exactly once.

Remove a matching pair of surrounding quotes and unescape the contents.

Turn percent-encoded text back into readable characters.

Percent-encode a string so it's safe to use in a URL.

Turn text upside-down using look-alike Unicode characters.

Duplicate every vowel in text immediately after itself.

Remove every vowel (a, e, i, o, u) from text, leaving consonants and punctuation.

Replace every vowel (a, e, i, o, u) in text with a chosen replacement character.

Redact chosen words with asterisks, matching each word's length.

Count the number of words in your text.

Duplicate every word, or every Nth word, immediately after itself in a block of text.

Mask every whole-word occurrence of specified target words with a repeated symbol.

Keep only the words containing (or not containing) a keyword.

Wrap every whole-word occurrence of a chosen word with a marker on both sides.

Mask the interior letters of every word, keeping the first and last letter visible.

Add a prefix to the start of every word in a block of text, preserving spacing.

Remove a fixed prefix from every word that begins with it, preserving spacing.

Wrap every individual word in your text with a quote character.

Shuffle the order of the words in a text, keeping each word intact.

Remove every whole-word occurrence of a target word, or comma-separated list of words, from text.

Replace every whole-word match of a target word with a replacement, word-boundary aware.

Reverse the order of words in a sentence while keeping each word spelled correctly.

Scramble the interior letters of each word, keeping the first and last letter fixed.

Sort the words of a text alphabetically, A-Z or Z-A.

Add a suffix to the end of every word in a block of text, preserving spacing.

Remove a fixed suffix from every word that ends with it, preserving spacing.

Swap every pair of adjacent words in text: word 1 with word 2, word 3 with word 4, and so on.

Remove a chosen symbol wrapped around each word in your text.

Wrap every word in your text with a chosen symbol on both sides.

Strip a quote character from both sides of every quoted word.

Wrap text to a maximum line width, breaking only at word boundaries, never mid-word.

Wrap XML markup as a quoted, escaped string literal.

Turn text into creepy, glitchy 'zalgo' text using random Unicode combining marks.

Strip zalgo's stacked combining marks and restore plain, readable text.

Render text as a zigzag pattern across multiple lines, like the zigzag cipher.

Generate random UUIDs (v4 or v7) or validate one and inspect its version and variant.

Generate short, random, human-friendly IDs with an unambiguous character set.

Generate ULIDs: 26-character, timestamp-prefixed, lexicographically sortable IDs.

Generate compact, URL-safe unique IDs with a customizable length and alphabet.

Generate CUID2-format IDs: a lowercase letter followed by random base36 characters.

Generate random API keys with a custom prefix, length, and character set.

Generate memorable, high-entropy passphrases from the EFF's short Diceware word list.

Generate random adjective-noun usernames with optional numbers and case styles.

Generate strong, random passwords with crypto.getRandomValues(), no modulo bias, with an entropy estimate.

Generate a real, scannable QR code from text, or decode one from an uploaded image.

Generate a real, scannable 1D barcode (CODE128, EAN-13, UPC, ITF-14, and more) from text.

Detect whether pasted CSV-like text uses commas, semicolons, tabs, or pipes, and normalize it to commas.

Upload a CSV or text file and detect its likely byte encoding: UTF-8, UTF-16, or Windows-1252/Latin-1.

Fix mojibake like "café" back to "café" by reversing a UTF-8-decoded-as-Latin-1 mistake.

Detect a leading UTF-8 byte order mark (BOM) in pasted text and strip it.

Convert CSV rows into TOON's compact tabular array syntax, designed to use fewer LLM tokens than JSON.

Left-join two CSVs on a shared key column, or extract just the columns you need from one CSV.

Strip a fixed number of characters from the start of every line.

Strip a fixed number of characters from the end of every line.

Remove a fixed prefix from the start of every line, only where it's actually present.