菜鸟工具#

https://c.runoob.com/

编码#

ASCII码#

https://www.habaijian.com/

在线转换#

https://www.107000.com/T-Ascii/
http://www.ab126.com/goju/1711.html

Base64#

在线转换#

https://www.qqxiuzi.cn/bianma/base64.htm
http://www.mxcz.net/tools/Unicode.aspx

密码#

Hash#

MD5#

http://www.ttmd5.com/
https://www.cmd5.com/

SHA1#

http://www.ttmd5.com/hash.php?type=5
https://tool.oschina.net/encrypt?type=2

HMAC#

http://encode.chahuo.com/

加解密#

AES、DES、PBKDF2、MD5、SHA、RC4、Rabbit、TripleDes

https://www.sojson.com/encrypt.html

进制转换#

https://tool.oschina.net/hexconvert/

Latex公式#

https://editor.codecogs.com/?lang=zh-cn

图像/文档/视频转换#

https://www.aconvert.com/
https://tools.pdf24.org/zh/
https://convertio.co/zh/image-converter/
https://pdf.online/?from=xodo

MP4转Mp3#

https://onlineconvertfree.com/zh/convert-format/m4a-to-mp3/

画图#

https://app.diagrams.net/

在线剪视频#

https://zenvideo.qq.com/

在线markdown#

http://mahua.jser.me/

B站视频下载#

https://bilibili.iiilab.com/

CTF常见编码及加解密#

https://www.cnblogs.com/ruoli-s/p/14206145.html