Free Tool
Salesforce ID Converter
Convert 15-character case-sensitive IDs to 18-character case-insensitive IDs.
18-Character Result
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Why do I need this?
Salesforce uses case-sensitive IDs (15-char) internally, but tools like Excel often corrupt them by treating "001A..." and "001a..." as the same. The 18-char ID adds a 3-character checksum to prevent data loss.