# Bulk unique Shopify discount codes that share one setup

To create many unique codes that all follow the same rules, set up and save one discount code, then add bulk codes to it. You can generate up to 10,000 random codes at a time or import your own list. Every code gives exactly the same offer as the discount they belong to, and changing that discount changes it for every code.

With [OneCode: Stackable Discounts](https://apps.shopify.com/rm-combo-discounts), that shared offer can include more than one kind of discount, for example 15% off products and free shipping. Bulk codes are only for discount codes, not automatic discounts.

For example, the discount `WELCOME` gives 15% off and free shipping. You generate 100 codes from it, such as `WELCOME-7KQ2MX9A`. A customer who enters one of those codes on a $60 order gets $9 off and free shipping, the same as with any other code from the batch.

![The editor for the code WELCOME: a 15% product discount on all products, a free shipping discount on all rates, and Maximum discount uses with a total limit of 1](/images/editor-welcome.png)

## Set it up

1. Create a discount code with the offer you want, and click **Save discount**. Before the first save, the **Bulk Discount Codes** card shows "Save discount first to enable".
2. On the discount's edit page, click **Create Bulk Codes** in the **Bulk Discount Codes** card on the right. Once the discount has bulk codes, the button reads **Manage Bulk Codes** with the number of codes.
3. On the **Bulk Code Creation** page, click **Generate Codes** or **Import CSV**.

Choose the primary code, the one you created the discount with, before you add bulk codes. Once a discount has bulk codes, renaming its primary code is not saved.

### Generate random codes

- **Prefix (optional):** letters, numbers, hyphens and underscores, for example `WELCOME`. OneCode adds the hyphen after the prefix, so type `WELCOME`, not `WELCOME-`.
- **Suffix Length:** 4, 6, 8, 10 or 12 random characters. 8 is recommended.
- **Number of Codes:** up to 10,000 per batch. Run another batch if you need more.

The random part never uses characters that are easy to mix up: 0, O, 1, I and L.

![The Generate Random Codes window with the prefix WELCOME, Suffix Length set to 8 characters (recommended), 100 codes, a preview of WELCOME-2X7TC2XG, and a Generate 100 Codes button](/images/bulk-codes-generate.png)

### Import your own codes

Upload a `.csv` or `.txt` file with up to 10,000 codes, one per line or separated by commas. Each code can be up to 255 characters. Leave out any header row such as "Code", or it will be imported as a code. Duplicates are removed, even when they differ only in capital letters.

### After the codes are created

The bulk codes page lists every code with its number of **Uses**. You can export the codes as a file, or delete some or all of them. The primary code is always kept.

![The Bulk Code Creation page for the primary code WELCOME, listing five additional codes with their uses, and Export All, Delete and Delete All buttons](/images/bulk-codes-page.png)

## Single-use or reusable

Usage limits are set on the discount, in **Maximum discount uses**, and Shopify counts them for each code separately:

- **One use per code:** tick **Limit number of times this discount can be used in total** and enter `1`. Each code then works for one order. This suits welcome emails and printed vouchers.
- **Reusable codes:** leave the total limit off. This suits one code per creator, where each code is used many times.

## What to use them for

- **A code for each creator:** import codes such as `ANNA10` and `JOE10`, and use the **Uses** count to see who drove sales. See [influencer codes during a sale](/guides/influencer-code-during-a-sale.md).
- **A unique welcome code for each subscriber:** OneCode does not send emails, so export the codes and load them into your email tool's unique coupon feature. Guests can use them without logging in. See [welcome discounts](/guides/welcome-discount.md).
- **Printed vouchers:** generate single-use codes and print one on each card or insert.

OneCode costs $9.90 USD every 30 days after a 7-day free trial, billed by Shopify. Install it from the [Shopify App Store](https://apps.shopify.com/rm-combo-discounts).