JSPM

Simple String Variable Replacement Formatter

sprintf parser and basic formatter

Opinionated HTML formatter focused towards making HTML diffs readable.

Customizable String Formatter

A string formatter and validator based on masks

Custom formatter that converts any string into Title Case

Angular Number Formatter - formats the number into human readable format when in Thousands, Millions and Billions.

A string manipulation toolbox, featuring a string formatter (inspired by sprintf), a variable inspector (output featuring ANSI colors and HTML) and various escape functions (shell argument, regexp, html, etc).

awesome string formatter

Custom string formatter that converts any string into [Title Case](http://www.grammar-monster.com/lessons/capital_letters_title_case.htm)

Snake and camel case formatter

Number formatter for imperial measurements with support for vulgar fractions

A barebones yet feature-rich string formatter.

Universal string formatter with pattern support (like 'XX XX XX')

A string formatter and validator based on masks

fast formatter for dates

sprintf formatting targetted for CLI

Tiny template string formatter with defaults and pipes.

format an error into string / json for log

Turkey Tel Number Formatter

String formatter like python in Nodejs

Tiny TypeScript utilities: strings & date formatter

Jest snapshot serializer that beautifies HTML.

ANSI escape codes for styling strings in the terminal

Strip ANSI escape codes from a string

A string manipulation toolbox, featuring a string formatter (inspired by sprintf), a variable inspector (output featuring ANSI colors and HTML) and various escape functions (shell argument, regexp, html, etc).

Terminal string styling done right

Regular expression for matching ANSI escape codes

Get the visual width of a string - the number of columns required to display it

Escape RegExp special characters

Wordwrap a string with ANSI escape codes

The string_decoder module from Node core

Get the native type of a value.

Check if the character represented by a given Unicode code point is fullwidth

Get a stream as a string, Buffer, ArrayBuffer or array

Strip UTF-8 byte order mark (BOM) from a string

Common formatter utilities to handle numbers, dates, times, etc.

Convert a dash/dot/underscore/space separated string to camelCase or PascalCase: `foo-bar` → `fooBar`

Parse JSON with more helpful errors

Given some data, jsesc returns the shortest possible stringified & ASCII-safe representation of that data.

A string formatter and validator based on masks

Returns `true` if the given string looks like a glob pattern or an extglob pattern. This makes it easy to create code that only uses external modules like node-glob when necessary, resulting in much faster code execution and initialization time, and a bet

Modify strings, generate sourcemaps

ANSI escape codes for manipulating the terminal

Matches strings against configurable strings, globs, regular expressions, and/or functions

Returns true if a string has an extglob.

Strip the final newline character from a string or Uint8Array

Slice a string with ANSI escape codes

prelude.ls is a functionally oriented utility library. It is powerful and flexible. Almost all of its functions are curried. It is written in, and is the recommended base library for, LiveScript.

Efficient implementation of Levenshtein algorithm with locale-specific collator support.

Compare strings containing a mix of letters and numbers in the way a human being would in sort order.

Indent each line in a string

ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.

Is this value a JS String object or primitive? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

Parse String to Number based on configuration

Convert a camelized string into a lowercased one with a custom separator: unicornRainbow → unicorn_rainbow

Get the real length of a string - by correctly counting astral symbols and ignoring ansi escape codes

Strip leading whitespace from each line in a string

ES5 spec-compliant shim for String.prototype.trim

Easily add ANSI colors to your text and symbols in the terminal. A faster drop-in replacement for chalk, kleur and turbocolor (without the dependencies and rendering bugs).

A robust HTML entities encoder/decoder with full Unicode support.

A JavaScript library for escaping CSS strings and identifiers while generating the shortest possible ASCII-only output.

Measure the difference between two strings using the Levenshtein distance algorithm

Querystringify - Small, simple but powerful query string parser.

A javascript module that scans through string to remove non-numerals and formats out any found numbers based on configuration passed to it.

Normalize a URL

Small footprint URL parser that works seamlessly across Node.js and browser environments

Truncate a string to a specific width in the terminal

Compile regular expressions' unicodeSets (v) flag.

Strip redundant indentation and indent the string

Get the shortest leading whitespace from lines in a string

Robustly get an object's own property keys (strings and symbols), including non-enumerables when possible

Generate a cryptographically strong random string

Generate a unique random string

Returns true if any values exist, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays.

A robust polyfill for the `CSS.escape` utility method as defined in CSSOM.

A robust & optimized `String.prototype.repeat` polyfill, based on the ECMAScript 6 specification.

Returns true if a value exists, false if empty. Works with deeply nested values using object paths.

Parse regular expressions' unicodeSets (v) flag.

Detect the indentation of code

LZ-based compression algorithm

Repeat the given string n times. Fastest implementation for repeating a string.

Determine the East Asian Width of a Unicode character

Get the visual width of the widest line in a string - the number of columns required to display it

Trim newlines from the start and/or end of a string

Check if a string has ANSI escape codes

Functions for dealing with a PostgresSQL connection string

mdast utility to get the plain text content of a node

Fastest Levenshtein distance implementation in JS.

A robust & optimized `String.prototype.includes` polyfill, based on the ECMAScript 6 specification.

a few common utility template tags for ES2015

Wildcard matching tools

Insert supplied variable values into a format string.

Convert object keys to camel case

Compute ripemd160 of bytes or strings.

Check if a character is alphabetical

Parse and stringify URL query strings

Check if a character is decimal

Check if a character is hexadecimal

Get the gzipped size of a string or buffer

Check if a character is alphanumerical

micromark utility to decode markdown strings

CommonJS version - The smallest and fastest command-line coloring package on the internet

Create an array by repeating the given value n times.

Math and string formula parser.

Easy way to split a string on a given character unless it's quoted or escaped.

Convert milliseconds to a human readable string: `1337000000` → `15d 11h 23m 20s`

Convert object keys from camel case

Convert a string to pascal case (upper camelcase).

A module that parses a string as regular expression and returns the parsed value.

Formatting Date objects as strings since 2013

Compare strings containing a mix of letters and numbers in the way a human being would in sort order.

Isomorphic, functional type-checking for Javascript

Split a string on the first occurance of a given separator

Hashing made simple. Get the hash of a buffer/string/stream/file.

Get the system locale

A collection of useful string formatting utilities

Convert a string index to its line and column position

Compare alphanumeric strings the same way a human would, using a natural order algorithm

Various helper utilities

Convert a string to a valid safe filename

Simple micro templating

Remove wrapping quotes from a string.

The most efficient JS implementation calculating the Levenshtein distance, i.e. the difference between two strings.

Repeat a string - fast

Functional errors with formatted output

Mapping between standard locale identifiers and Windows locale identifiers (LCID)

Convert a value to a ReadableStream

ES2017 spec-compliant String.prototype.padEnd shim.

Useful utilities for working with Uint8Array (and Buffer)

Terminal string styling with tagged template literals

Trim a consecutively repeated substring: foo--bar---baz → foo-bar-baz

Strip a substring from the start/end of a string

Returns `true` if the value is a primitive.

The smallest and fastest command-line coloring package on the internet

Convert a string/promise/array/iterable/asynciterable/buffer/typedarray/arraybuffer/object into a stream

Functions that surround a string with ansicolor codes so it prints in color.

Simple wildcard matching

Remove the trailing spaces from a string.

Check if a string is a URL

Capitalize every word in a string: `unicorn cake` → `Unicorn Cake`

Escape strings for use as JavaScript string literals

Remove leading indentation from ES6 template literals.

Get the line and column number of a specific character in a string

Stringify Object as tree structure

fast string hashing function

hast utility to get the plain-text value of a node

Iterate any iterable JS value. Works robustly in all environments, all versions.

Serializes any DOM node into a String

Lightweight and performant natural sorting of arrays and collections by differentiating between unicode characters, numbers, dates, etc.

Pluralize a word

Stringify is to `eval` as `JSON.stringify` is to `JSON.parse`

Strip a byte order mark (BOM) from a string.

The color gray, in ansi.

String manipulation extensions for Underscore.js javascript library.

Returns true if a windows file path has invalid characters.

Newline character converter

A simple string template function based on named or indexed arguments

Parse JavaScript one character at a time to look for snippets in Templates. This is not a validator, it's just designed to allow you to have sections of JavaScript delimited by brackets robustly.

Elegant spinner for interactive CLI apps

Native JS murmur hash implementation

hast utility to get the plain-text value of a node according to the `innerText` algorithm

Check if a character is a whitespace character

Check if a character is a word character

Check if a string is SVG

DOMParser.parseFromString for XML with IE8 fallback

Beautiful color gradients in terminal output

Find multiple RegExp matches in a string

Right pad a string with zeros or a specified string. Fastest implementation.

Regular expression for matching HTML comments

Reduce function calls in a string, using a callback

Check if a string is an IP address

Various helper utilities for working with buffers and binary data

Convert Unicode characters to Latin characters using transliteration

A robust & optimized `String.fromCodePoint` polyfill, based on the ECMAScript 6 specification.

Slugify a string

Pure-JS printf

ES2017 spec-compliant String.prototype.padStart shim.

Returns true if a file path does not contain any invalid characters.

Remove any existing casing from a string.

The color cyan, in ansi.

nlcst utility to transform a tree to a string

Convert a string to space case.

The color red, in ansi.

Returns true if the value passed is all whitespace.

ES2019 spec-compliant String.prototype.trimLeft shim.

Extensible string utility for converting, identifying and flipping string case

Returns `true` if an array has a glob pattern.

remove diacritics from strings

ES2019 spec-compliant String.prototype.trimLeft shim.

String encoding utilitlies extracted from TweetNaCl.js

Convert HTML entities to HTML characters, e.g. `>` converts to `>`.

Math and string formula parser.

String formatting inspired by Python's str.format()

Lightweight format utility for the browser, based on util.format().

[](https://www.npmjs.com/package/levenary) [](https://github.com/tanhauhau/levenary/actions)

Serialises error object to normal object

A robust & optimized `String.prototype.codePointAt` polyfill, based on the ECMAScript 6 specification.

Check if a string only contains alphanumeric characters

Convert efficiently index to/from line-column in a string

Write data to a random temporary file

Convert a string to camel case.

Similar to String#trim() but removes only newlines

strings comparison matchers for chai

Zero-dependency unicode-aware string tools

Check if a string is HTML

Get a pretty output of the original, minified, gzipped size of a string or buffer: 130 B → 91 B → 53 B (gzip)

Replace search occurrences with a replacement string.

Base64 and base64url to string or arraybuffer, and back. Node, Deno or browser.

Pad strings to a given length

Convert HTML/XML source code or DOM nodes to React elements

parses number and unit, '20px' into [20, 'px']

The fast way to check if a string is blank

Consume a stream of data into a binary Buffer as efficiently as possible

Escape a regular expression string or pattern.

Iterator over lines in a string

Test if a value is a string.

Test if a value is a regular expression string.

Returns true if the given number is odd, and is an integer that does not exceed the JavaScript MAXIMUM_SAFE_INTEGER.

Tokenize a string into an array of string parts and format identifier objects.

Convert between POSIX and Windows paths.

Object & string diff rendering for all displays

Generate string from a token array by interpolating values.

Parse parentheses from a string

Convert a camelized/dasherized/underscored string into a humanized one: `fooBar-Baz_Faz` → `Foo bar baz faz`

Get a property from an object using dot (object path) notation.

Get the length of unicode strings

A robust & character encoding–agnostic JavaScript implementation of the `Quoted-Printable` content transfer encoding as defined by RFC 2045.

Escape a string for use in AppleScript

Create a regular expression from a regular expression string.

easier than regex string matching patterns for urls and other strings. turn strings into data or data into strings.

slugifies even utf-8 chars!

Convert a string to lowercase.

alters a string by replacing multiple range fragments in one fast pass

Ethiopian Telephone Number Formatter

Allocate a buffer containing a provided string.

Split string by any separator excluding brackets, quotes and escaped characters

Tagged template literal for Sanity.io GROQ-queries

Return a regular expression to parse a regular expression string.

Regular expression for matching URLs

Contains some util methods for converting numbers into words, ordinal words and ordinal numbers.

parse a css color string

Simple implmentation of Stream.Readable and Stream.Writable holding the data in memory.

Converts a Buffer/String into a readable stream

Convert a string into a stream (streams2)

Strip ANSI color codes from a string. No dependencies.

Left pad a string with zeros or a specified string. Fastest implementation.

small function to append a query string to a URL

A collection of personal utilities to live a happier life

A fully Unicode-aware string reverser written in JavaScript.