What is the difference between 15 digit and 18 digit IDs in Salesforce?

What is the difference between 15 digit and 18 digit IDs in Salesforce?

15 Digit Id is case-sensitive whereas 18 Digit Id is case-insensitive.

Many legacy applications doesn’t support case sensitive strings, so in that case we can make use of 18 digit Id which is case in-sensitive.

15 digit or 18 digit depends upon your requirement and dependent application.

API always makes use of 18 digit Id.

URL in Salesforce makes use of 15 digit Id.

Cheers!!!

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