Software Venture Consulting

FileMaker Pro downloads & Resources
FileMaker Custom Functions
FileMaker Web Viewer Examples
FileMaker Pro & Lasso Consulting
FileMaker Books
FileMaker Articles
FileMaker Error Reference

Free Web Tools
Free FileMaker Tools

Personal Pages

Shopping Cart
Shopping Cart


Free Newsletter


Privacy Policy

FileMaker is a registered trademark of FileMaker, Inc. in the U.S. and other countries.


 FileMaker Pro Custom Functions

List  |  Show Random  |  Upload  |  Add This to Your Site


Rate this function:  

  Average rating: 4.1  (49 votes)
  Discuss this Custom Function

Jeremy Bante,

Creates universally unique IDs suitable for use in FileMaker number fields.

Sample Input:
Sample Output:

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.


Creates a universally unique identifier suitable for use as a primary key in FileMaker number fields. The UUID is an encoding of the creation timestamp, a serial number, and the PersistentID of the device that created the UUID. The values returned by this and related functions have a one-to-one correspondence with UUIDs following the RFC 4122 standard — all values in the format generated by this function can be converted to RFC 4122, and visa-versa.

This function generates UUIDs that are meaningfully sortable. Values sort by version, then approximate creation order. Because of the leading sort by version, random (version 4) values (where the creation order cannot be determined by the values) will cluster separately from timestamp-node (version 1) values.

The value can be converted to RFC 4122 canonical form (hexadecimal) with the UUIDGetAsRFC4122 function. The creation timestamp can be extracted with the UUIDGetTimestamp function.

This page originally posted the UUIDTimeNIC function, but that function has been deprecated because FileMaker Go running on iOS 7 no longer gets meaningful results from the Get ( SystemNICAddress ) function. This UUIDTimeDevice function should be used instead moving forward.

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


There are no comments yet. Be the first to post a comment about this Custom Function! Please try to keep it brief & to the point. Anyone can post:

Your Name:
characters left. If you paste in more than 1500 characters, it will be truncated. Discuss the function - advertisements and other useless posts will be deleted.
Answer 0 + 5 =
Search for Custom Functions:

Custom Functions Widget
Download the Custom Function Dashboard Widget for OS X
Keep all the latest Custom Functions right at your fingertips!

Newest Custom Functions:

1. HexUUIDToNum_cf (_uuid)
  (Sat, Jun 16, 1:55pm)
2. httpResponseCode ( responseHeaders )
  (Tue, Jun 12, 10:40pm)
3. FindDuplicateCharacters ( string )
  (Fri, Jun 08, 5:01pm)
4. FieldRepetitionLast ( field ; maxRepetition )
  (Wed, Jun 06, 6:05pm)
5. CountModifiedRecords ( NameTimestampField ; StartTimestamp ; EndTimestamp )
  (Mon, May 28, 8:23am)
6. JSONArrayLength ( JSONArrayStr )
  (Fri, May 25, 7:46am)
7. interpolation (y1; y2; y3; x1; x2; x3; x1y1; x2y1; x1y2; x2y2; rnd)
  (Sat, May 19, 3:55am)
8. @JSONFormatElements ( json )
  (Tue, May 15, 3:31am)

RSS Feed of Custom Functions