at present, Whether it's a front-end developer or a personal webmaster, Some code processing tools are often needed, such as: Code comparison, Code formatting, Icon making, etc.
Sometimes it's just in a hurry, but there's no software installed on the computer, Here is a collection of online tools that we often use.

Code comparison/ Merge: http://www.matools.com/compare 
regular expression : http://www.matools.com/regex 
js/css compress: http://www.matools.com/compress 
Web palette: http://www.matools.com/color 
crontab Expression: http://www.matools.com/crontab 
Timestamp conversion: http://www.matools.com/timestamp 
Code formatting: http://www.matools.com/codeformat 
Common fonts for web pages: http://www.matools.com/pageword 
HTML⇆JS: http://www.matools.com/htmljs 
XML⇆JSON: http://www.matools.com/xmljson 
HTML Special symbols: http://www.matools.com/specialchar 
CSV turnHTML: http://www.matools.com/csv2tb 
LESS Compiler: http://www.matools.com/less 
Markdown: http://www.matools.com/markdown 
UBB Compiler: http://www.matools.com/ubb 
On line code conversion: http://www.matools.com/codeconvert 
Online decimal conversion: http://www.matools.com/hexconvert 
picture⇆Base64: http://www.matools.com/img2base64 
Base64 Encoding and decoding: http://www.matools.com/base64 
Text encryption and decryption: http://www.matools.com/encrypt 
MD5 encryption: http://www.matools.com/md5 
Morse code: http://www.matools.com/morse 
generatehtpasswd: http://www.matools.com/htpasswd 
HTTP State query: http://www.matools.com/pagestatus 
Port scan: http://www.matools.com/port 
IP query: http://www.matools.com/ip 
favicon Icon making: http://www.matools.com/favicon 
Generate QR code: http://www.matools.com/qrcode 
gif Map making: http://www.matools.com/gif 
ID card information query: http://www.matools.com/id 
Chinese conversion: http://www.matools.com/zhconvert 
toggle case: http://www.matools.com/upperconvert 
Zip code area code query: http://www.matools.com/postcode 
Scientific calculator: http://www.matools.com/calculator 
Unit Converter : http://www.matools.com/unit 
Chinese character to Pinyin: http://www.matools.com/pinyin 
word count: http://www.matools.com/countChar 
Literal weight removal: http://www.matools.com/repeat 
Online answer: http://www.matools.com/exam