Coupon Code Generator
Generate unique coupon codes with a prefix, length, grouping and character set. Optionally avoid look-alike characters so codes are easy to type.
Generate unique coupon codes with a prefix, length, grouping and character set. Optionally avoid look-alike characters so codes are easy to type.
Promo codes work best when they are short, easy to type and hard to guess. This generator builds codes from a random source with an optional prefix such as SAVE, split into groups like SAVE-AB3K-9XYZ.
You can leave out characters that are easy to confuse, such as the letter O and the number 0.
The number of possible codes is the size of the character set raised to the number of random characters. Letters and numbers give 36 characters, and removing look-alikes O, 0, I, 1 and L leaves 31. With the default 8 random characters, that is 31 to the power of 8, roughly 853 billion possible codes. Because that is so much larger than a batch of 500, the chance of guessing a valid code is tiny, but it is not zero, so limit redemptions per code and per customer on your own system.
Format affects usability. The tool uppercases the prefix, strips anything other than letters, numbers and hyphens, and splits the random part into groups with hyphens when the group size is smaller than the length, giving codes like SAVE-AB3K-9XYZ. Shorter codes are easier to type but easier to guess, and numbers-only codes of six digits offer only one million combinations. The generator ensures uniqueness only within one batch and does not know which codes you issued earlier or whether they have been redeemed, so tracking, expiry and validation must be handled by your store or application.
They are unique within each batch. Compare against codes you issued earlier.
They are random, but anyone who sees a code can use it. Enforce limits and expiry on your own system.
The number of characters raised to the code length. If you ask for more than exist, the tool shows an error.
No. They are generated in your browser.
Six to ten random characters is common. Longer is harder to guess, but shorter is easier to type. Match length to value, using longer single-use codes for high-value offers.
Yes, through the prefix, for example BLACKFRI or SUMMER25. The random part that follows keeps each code unique and difficult to guess, while the prefix helps you recognise the campaign.