You can use the W3C validator for checking HTML, and you can use JSLint or JSHint for Javascript.
Also, we have a code review site here on Stack Exchange.
Pregunta
Can anyone advise where I can have my website reviewed?
Is there an online forum for website critique?
What online software is there that can analyse my code?
Solución
You can use the W3C validator for checking HTML, and you can use JSLint or JSHint for Javascript.
Also, we have a code review site here on Stack Exchange.
Otros consejos
W3C's validator will validate your HTML and CSS.