Coupon Code Generator

There's no catch. The generator runs entirely in your browser using JavaScript. Your codes never touch our servers, we don't store them, and there's no rate limit. We built this as a utility tool for the coupon community. The site makes money through verified coupon listings and merchant partnerships, not through this generator.

No. Zero data leaves your browser. The code generation uses your device's built-in cryptographic random number generator (window.crypto.getRandomValues) when available, falling back to Math.random only on older browsers. There are no API calls, no analytics on what you generate, and no cookies related to this tool. Close the tab and the codes exist only in your clipboard or exported CSV.

Yes, through the pattern field. Type any literal character and it gets included as-is. For example, the pattern DEAL_****_## produces codes like DEAL_KXMT_47. The tokens (*, #, A, a) get replaced with random characters; everything else stays exactly where you put it. This lets you embed dashes, underscores, dots, or any separator your system requires.

500 codes per generation. This is a deliberate limit because generating more than 500 unique codes in a single browser operation starts to feel sluggish on lower-end devices, and the uniqueness check (which ensures no duplicates within a batch) gets slower as the set grows. For larger needs, just run multiple batches and combine the CSV files. Most spreadsheet tools handle this with a simple paste.

Within a single batch, yes. The generator uses a Set internally and keeps generating until it has the requested number of distinct codes. Across separate batches, uniqueness isn't enforced, but the collision probability is astronomically low. With a 10-character alphanumeric code, you have 3.6 trillion possible combinations. Even after generating 100,000 codes, the chance of a single duplicate is roughly 1 in 36 million.

Yes. The CSV export produces a single-column file with a "code" header, which is the exact format Shopify's bulk discount import expects. WooCommerce, BigCommerce, Magento, and most other platforms accept the same format or a simple variation. For platforms that need additional columns (like discount amount or expiry date), open the CSV in a spreadsheet, add your columns, and re-export. The codes themselves are plain text and work anywhere.

The strength meter calculates the total number of possible unique combinations for your current settings and compares it to the number of codes you're trying to generate. If the combination space is less than 10x your batch size, you'll see a warning. This matters because the generator needs headroom to find unique codes efficiently. If you're generating 500 codes but only 600 combinations exist, the last few codes take exponentially longer to find. The fix is simple: increase code length by 1–2 characters or switch to a larger character set.

Prefix and suffix are applied outside the random body. They're always literal and don't count toward the randomness of the code. The pattern field replaces the entire body and gives you token-level control over each position. You generally don't need both: if your structure is "fixed text + random middle + fixed text," use prefix/suffix. If you need randomness and literals interleaved (like ##-AA-##), use a pattern. Using a pattern disables the code length and separator controls since the pattern itself defines the structure.

Once the page has loaded, yes. All generation logic runs client-side with no network calls. If you lose your internet connection mid-session, you can still generate, copy, and even export CSV files since those are created as local blobs in your browser. The only thing that requires connectivity is loading the page initially.

Numeric codes work well in two specific situations: phone-based redemption (it's faster to say "4729" than to spell out "K-X-M-T") and systems that only accept numeric input fields. Some POS terminals and older e-commerce setups restrict coupon fields to digits. The tradeoff is fewer combinations per character (10 vs 36 for alphanumeric), so you'll need longer codes to maintain the same uniqueness guarantees. A 12-digit numeric code gives you a trillion combinations, which is plenty for most campaigns.