Generate codes

Select a discount, then choose Generate codes. The form creates a job: a set of unique codes that CodeBulk imports into the discount in the background.

Fields

Field	Values	Default
Count	1 to 1,000,000	1
Charset	Alphabetic (A–Z), Numeric (0–9) or Alphanumeric (0–9 and A–Z)	Alphanumeric
Length	2 to 20. Counts the random characters only, not the prefix, suffix or job ID	8
Prefix	Optional, up to 15 characters	empty
Suffix	Optional, up to 15 characters	empty
Include Job ID (recommended)	On or off	on
Title	Up to 100 characters, for your reference	the discount’s title and the job ID

The Example beside the form shows a sample code built from the current settings. Reset puts the fields back to their defaults.

How a code is built

Each code is prefix + random characters + job ID + suffix, all in uppercase. The codes in one job are always unique: CodeBulk keeps drawing until it has as many distinct codes as you asked for.

The job ID is the number of sets your store has created, written in base 36: the first job is 0, then 1, 2 and so on.

Keep Include Job ID on

In the app’s words, it “helps ensure that codes are unique when creating multiple large jobs.” Shopify needs every code to be unique across all the discounts in your store, so a code that already exists fails to import. You can turn the job ID off for small runs, long lengths, or when the prefix or suffix is different every time.

How many codes fit

A job can use at most half of all the possible codes for its length and charset. For example, 4 numeric characters allow up to 5,000 codes. See How many codes can I make?