Free Code & Markup Tools

13 free tools for working with code and markup languages. Format CSS, JavaScript, HTML, SQL, and XML. Escape HTML and JSON strings, validate YAML, generate meta tags, create QR codes, and parse cron expressions — all browser-based with no installation required.

All Code & Markup Tools

CSS FormatterPopular

Minify or beautify CSS stylesheets

JS FormatterPopular

Minify or beautify JavaScript code

HTML FormatterPopular

Beautify or minify HTML markup

HTML Escape

Escape special HTML characters to entities

HTML Stripper

Remove all HTML tags to extract plain text

HTML Entities

Searchable reference for all HTML entity codes

SQL Formatter

Beautify and format SQL queries

XML Formatter

Format, validate, and minify XML

YAML Validator

Validate YAML syntax and preview parsed structure

JSON Escape

Escape or unescape JSON string values

Meta Tag Generator

Generate SEO, OG, and Twitter Card meta tags

QR Code Generator

Create QR codes for URLs, text, and more

Cron Parser

Explain cron expressions in plain English

Code formatters and beautifiers

All code formatters support both beautification (adding indentation for readability) and minification (removing whitespace for production). The CSS formatter handles standard CSS including media queries and nested selectors. The JS formatter handles modern JavaScript syntax including arrow functions and template literals.

HTML tools

HTML Formatter beautifies or minifies HTML. HTML Escape converts special characters to entities so they render as literal text. HTML Stripper removes all tags to extract plain text. HTML Entities provides a complete reference chart of all HTML entity codes with a search box.

Validators and specialized tools

XML Formatter validates and pretty-prints XML. YAML Validator checks YAML syntax and shows the parsed structure. Cron Parser explains any cron expression in plain English and shows the next execution times. Meta Tag Generator creates complete SEO and Open Graph markup for any web page.