How it works
How to generate bulk coupon codes
Set your prefix
The prefix tags the codes so your team knows where they came from. SAVE10, BFCM, VIP, PR - pick something short and memorable. Suffixes work too, for campaign versioning (PRLAUNCH-V2).
Pick length and character set
6 characters gives 56 billion combinations with letters and numbers - more than enough for any single campaign. Excluding ambiguous characters (0, O, 1, I, L) stops support tickets from customers who misread codes.
Generate and import
Set the quantity (up to 500 per batch) and click Generate. Copy the plain text list or download the CSV. Import into Shopify Discounts, WooCommerce Smart Coupons, or any platform that accepts a CSV of codes.
Coupon code best practices
Random codes are harder to guess, easier to track, and less vulnerable to abuse than predictable ones.
One-time vs multi-use codes
Unique codes (one per customer) are best for referrals, influencers, and reactivation emails. Multi-use codes (one shared code like BFCM25) are for mass campaigns. Generate unique codes here and configure each as single-use in your cart platform.
Exclude ambiguous characters
The characters 0 and O, 1 and I and L, look similar in most fonts. A customer reading a code off a postcard or email confuses them all the time. Excluding these cuts support tickets dramatically. Every batch here defaults to the safe set.
Keep length practical
4 to 8 random characters with a 3 to 5 character prefix is a sweet spot. Short codes are easier to type on mobile. Long codes feel unprofessional and get abandoned. 6 is a good default.
Prefix your codes by campaign
SAVE, BFCM, WELCOME, REWARD - the prefix becomes a visible tag inside your orders export. Makes it trivial to analyze which campaigns drove revenue without building custom reports.
Pair codes with post-purchase review requests
Some stores thank every customer who leaves a review with a small discount, whatever their rating. Generate a batch of unique codes and set each as single-use. Google does not allow incentives for Google reviews, so keep this to reviews on your own store.
Expiry and usage limits matter
A code that never expires is a lifetime discount for whoever screenshots it. Always set an expiry date and usage cap inside your ecommerce platform after importing the batch. Even single-use codes benefit from a hard expiration.
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Questions, answered
Up to 500 per batch. For larger campaigns, run the generator multiple times with the same prefix. The tool guarantees no duplicates within a single batch.
Yes. Each code body is generated with a cryptographically-seeded random character selection. With 6 characters from 34 possible chars, the odds of a collision inside a batch of 500 are effectively zero.
Yes. Copy the codes or download the CSV. In Shopify, go to Discounts > Create discount, set up the offer (e.g. 10% off), then use the CSV import option to bulk-create unique codes. Shopify supports bulk CSV import of discount codes on paid plans.
Yes. WooCommerce accepts bulk coupon import via plugins like Advanced Coupons or Smart Coupons. The CSV format (one code per line, quoted) downloaded here works with most of them.
A one-time code works for a single customer once. Multi-use codes can be redeemed by anyone who knows the code. Unique codes generated here are designed for one-time use - configure single-use on your platform to prevent sharing and leaks.
Both gives you the most combinations in the fewest characters. Letters-only feels more brand-like but runs out of unique codes faster. Numbers-only is easy to read on mobile. For most campaigns, stick with both.
The generator outputs PREFIX + body + SUFFIX. For hyphenated formats, use the prefix and suffix fields with a short body (e.g. prefix SAVE-, body 4 chars, suffix -2026). The format is flexible.
Ask every customer for a review
Generate your codes here. WiserReview asks every customer for a review after their order, automatically, and shows the reviews on your store.
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