Web developer tools

Validators, generators, and converters

• HTML/CSS/JS unquoted attribute value validator
• Ambiguous ampersand checker for HTML
• Custom HTML element name validator
• CSS escaper
• Unquoted CSS font family name validator
• JavaScript escaper
• JavaScript operator precedence
• JavaScript variable name validator
• JavaScript property name validator
• Punycode IDN domain name converter
• HTML entity encoder/decoder
• URL encoder/decoder
• Legacy HTML color value previewer (bgcolor, text, link, vlink, and alink attribute values)
• Base64 encoder/decoder
• UTF-8 encoder/decoder
• WTF-8 encoder/decoder
• Quoted-Printable encoder/decoder
• Q encoder/decoder
• Binary ↔ ASCII converter
• Bacon’s cipher encoder/decoder
• JavaScript regular expression transpiler
• String reverser

Miscellaneous

• String length & UTF-8 byte counter
• Lua minifier
• Brainfuck minifier
• Twitalics

External (not mine)

• text-shadow and sassy mothereffing text-shadow
• HSL
• Drag & drop animated GIF creator