How do I get my contacts/accounts to use web to lead to upda

How do I get my contacts/accounts to use web to lead to upda

I've got 1000+ contacts and half as many accounts. I want my contacts and accounts to go to a form generated by ZohoCRM to update their information.

How do I that? And, if it's not possible, then I would very very much like to see this tool made available in the future...

Unique URLs with generated passwords for one time access by the contacts/accounts?

Please! Updating contact information manually is a time killer... give us a tool to let our contacts/accounts do that for us!

thank you!
Dennis
Dennis Daniels