Record ID Migration Mapper
Map old record IDs to fresh UUID v4 or v7 values, review repeated IDs, and export a complete local lookup table.
How can I create a UUID lookup table for existing record IDs?
Paste one old ID per line or a single-column CSV, choose UUID v4 or v7, and generate the mapping. Repeated IDs reuse the same new UUID by default. Download the complete CSV or JSON mapping before you leave; another run generates a different mapping.
Your result
A little clarity, right here.
Start with your own content or load the example. Your result will appear here.
Three simple steps
How to use Record ID Migration Mapper
Paste your input or load the example, then choose the options.
Generate a batch and review the result. Each run creates new random values.
Download the complete output and keep it before leaving the page.
Common questions
Good to know
Understand the result.
Keep the original.
Is this tool free, and are my files uploaded?
This tool is free with no account required. The work happens in your browser. Your input and files are not sent to a processing server.
What are the limits and details?
Up to 10,000 IDs, 1,000 characters per ID and 500 KB of UTF-8 input. This creates a local lookup file only and never updates a database. Leading zeroes and spaces are preserved unless trimming is selected. CSV downloads protect formula cells with an apostrophe; JSON preserves exact old IDs. UUID v7 includes a generation timestamp. Preview shows the first 500 rows; downloads contain every row.
10,000 IDs, 500 KB. Generates a lookup file only.