Coupon Code Generator: Bulk Codes Ready in Seconds

Generate hundreds of unique coupon codes with custom prefixes, lengths, and formats, ready to import into your store or email tool in seconds.

Try:

2 credits per run. 20 free credits when you sign up, no credit card required.

Summer sale · 10 codes

Example
Copy

SUMMER-7KQ2PX

SUMMER-M4TZ8R

SUMMER-QW9N3C

SUMMER-H6RD2V

… 6 more

Example output. Yours is written for the details you enter.

How it works

From a short brief to a draft you can use straight away.

  1. Step 1

    Describe what you need

    A few details about your business, audience and goal.

  2. Step 2

    AI writes the first draft

    Tailored to your inputs and the platform it is for, in seconds.

  3. Step 3

    Edit, copy and use

    Tweak the tone, copy it in one click, and generate more variations.

What you get

What the result tells you, and why it is worth the minute it takes.

  • Bulk Codes Instantly

    Create one code or thousands at once, each one unique, so every customer or campaign gets its own.

  • Custom Prefixes and Formats

    Set prefixes, length, and character rules so codes match your brand and your platform's requirements.

  • No Duplicate Headaches

    Every code in a batch is generated unique, so redemptions stay clean and fraud is easier to spot.

The guide

What the coupon code generator does, how to use it, and what to do with the result.

A coupon code generator creates promo and discount codes in bulk so you can run a sale, reward customers or track a campaign without typing codes by hand. Choose how many codes you need, a prefix such as SUMMER, the length and the style, and the generator returns a list you can paste or import into your store.

How to Generate Promo and Coupon Codes

Decide what the codes are for first: one shared code for a public sale, or many single-use codes for a mailing list or influencer campaign. Then set a recognisable prefix, a length of eight to twelve characters, and the number you need. Copy the list into a spreadsheet so you can keep track of who received which code.

Choosing a Good Code Format

Short, readable codes get used; confusing ones get mistyped. Avoid characters people mix up, such as 0 and O or 1 and I, use capitals, and keep a prefix that tells you which campaign a redemption came from. For single-use codes, add enough random characters that nobody can guess them.

Shared Codes vs Unique Codes

A shared code such as WELCOME10 is easy to promote but spreads on coupon sites. Unique single-use codes cost a little more effort but let you limit each code to one order, see exactly which channel or partner drove a sale, and stop codes leaking.

Importing Codes Into Your Store

Most platforms, including Shopify and WooCommerce, let you create discounts in bulk or import codes from a CSV file. Set the discount value, minimum order, expiry date and usage limit on the discount itself. Check the list for duplicates before you import; your store will reject codes that already exist.

Preventing Discount Abuse

Give every campaign an end date, limit unique codes to one use per customer, and exclude items you cannot afford to discount. Review redemptions weekly so you can switch off a code that has escaped onto coupon sites.

Frequently asked questions

Something else? Email support@brainito.com

How do I create bulk discount codes for Shopify?

Generate the list here with your prefix and length, then create the discount in Shopify and add the codes in bulk or import them as a CSV. Set the value, expiry and usage limit on the discount.

How do I generate a promo code?

Choose how many codes you need, a prefix that names the campaign, such as SUMMER, and a length of eight to twelve characters, then generate. Copy the codes into your store's discount settings, set the discount and expiry date there, and test one at checkout before you share it.

What makes a good promo code?

Eight to twelve capital letters and numbers, a prefix that identifies the campaign, and no easily confused characters such as 0 and O. Use single-use codes when you need to control or track redemptions.

How many coupon codes can I generate at once?

You can generate codes in bulk, from a handful for a VIP list to thousands for a store-wide 2026 promotion. Each batch is exported as a simple list you can paste or upload into Shopify, WooCommerce, or your email platform.

Can I control the format of the codes?

Yes. Choose a prefix like SAVE or VIP, set the code length, and pick whether to use letters, numbers, or both. That keeps codes readable for customers while staying unique enough to prevent guessing.

Is the Coupon Code Generator free?

It is free to try. Every new Brainito account comes with 20 free credits, and each run costs 2 credits. There is no credit card required, and the codes are yours to use in any store, cart, or campaign.

Where to go from here

The coupon code generator answers one question. These are the next ones worth asking.

  1. Step 1Cart Recovery Email GeneratorSend the codes to abandoned cartsOpen
  2. Step 2Email Subject Line GeneratorWrite the campaign subject lineOpen
  3. Step 3Email MarketingTurn the list into campaigns and flowsOpen

This tool checks one thing. An audit checks 77.

Want it fixed and tracked? See the Marketing Manager

Run a free marketing audit

Generate unique, on-brand coupon codes in bulk, ready for your next promo

One account unlocks the coupon code generator plus 320+ marketing tools, weekly audits and your action plan.

  • 20 free credits when you sign up
  • 2 credits per run
  • No credit card required