Fastest HTML entities encode/decode library.

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

A JavaScript library that breaks strings into their individual user-perceived characters (including emojis!)

Promptbook: Create persistent AI agents that turn your company's scattered knowledge into action

Detect trojan source attacks that employ unicode bidi attacks to inject malicious code

A little helper for handling strings containing zero width control characters, ANSI styling, whitespaces, newlines, 💩, etc.

Official Tiptap extension for PromptShield - Protect your editor from Prompt Injection and Trojan Source attacks in real-time.

MCP server for text hygiene: sanitize text before feeding it to an LLM (strip invisible characters, flag prompt injection), scan for hidden text, and clean LLM formatting. Companion to noatmark.com.

A wide-character aware text alignment function for use on the console or with fixed width fonts.

render domhandler DOM nodes to a string

Blazing fast and accurate glob matcher written in JavaScript, with no dependencies and full support for standard and extended Bash glob features, including braces, extglobs, POSIX brackets, and regular expressions.

Checks and sanitizes strings by removing invisible characters that can be used to try to fool validation systems.

Convert and detect character encodings in JavaScript

Regenerate sets for Unicode properties and values.

QRCode / 2d Barcode api with both server side and client side support using canvas

Node.js library for parsing crontab instructions

StegCloak is a pure JavaScript steganography module designed in functional programming style, to hide text in plain sight - with key features like encryption and top-notch text compression. It can be used in social media or for any other covert communicat

Cloudflare Turnstile integration for React.

Trie Data Structure to support cspell.

Special characters feature for CKEditor 5.