A WooCommerce coupon code is a unique alphanumeric string that customers enter at checkout to receive a discount. WooCommerce stores coupon codes in the post_title field and treats them as case-insensitive during validation — meaning SUMMER20 and summer20 are recognized as the same coupon. Each coupon can have its own discount type (percentage, fixed cart, or fixed product), usage limits, expiry dates, and eligibility rules.

This tool supports generating up to 200 unique coupon codes per batch. All codes are guaranteed to be unique within the batch. If you need more codes, simply run multiple batches with different prefixes to keep them organized. For extremely large campaigns (thousands of codes), we recommend using WooCommerce's built-in coupon import functionality with a CSV file exported from this tool.

Yes. The generator uses JavaScript's crypto.getRandomValues() for cryptographically strong randomness and maintains a Set-based deduplication process. If a duplicate is generated (extremely unlikely with 8+ character codes), the tool automatically regenerates it. Each batch is guaranteed to contain only unique codes. However, uniqueness is only ensured within each batch — running the same settings twice may produce overlapping codes.

We recommend avoiding confusing characters like 0 (zero) and O (capital O), or 1 (one), I (capital i), and l (lowercase L). These cause frustration when customers manually type codes. Our "Exclude confusing chars" toggle (enabled by default) automatically removes these. Also avoid spaces, quotes, slashes, and emoji — they may cause issues in URLs, emails, or database queries.

The sweet spot is 8 to 12 characters (excluding prefix/suffix). This provides enough entropy to prevent guessing (36⁸ ≈ 2.8 trillion combinations with alphanumeric chars) while remaining short enough for customers to type comfortably. WooCommerce supports codes up to 255 characters technically, but codes longer than 20 characters are cumbersome for users and may get truncated in some email clients or analytics platforms.

After generating codes with this tool, click the CSV download button to export your codes. Then in your WordPress admin, go to WooCommerce → Coupons → Import (or use a plugin like WP All Import). Map the CSV column to the coupon code field. You can also use the built-in WordPress importer at Tools → Import. For advanced bulk creation with pre-configured discount rules, consider the Smart Coupons plugin by WebToffee.

Yes, completely free and private. All code generation happens entirely within your browser using client-side JavaScript. No data is ever sent to any server, stored in any database, or shared with third parties. Your generated coupon codes, prefix/suffix settings, and browsing activity remain 100% local to your device. You can disconnect from the internet after the page loads and the tool will continue working perfectly.

Yes, WooCommerce accepts most printable ASCII characters in coupon codes, including ! # $ % & * + - _ =. However, we recommend using special characters sparingly. Characters like &, #, and ! may require URL encoding in certain contexts. The safest special characters for coupon codes are hyphens (-) and underscores (_), which work universally across all systems without any encoding issues.

A good coupon code strategy balances memorability, security, and brand alignment. Use descriptive prefixes (like VIP_ or BF_ for Black Friday) to categorize campaigns. Keep random portions between 8–12 characters. Avoid sequential patterns (e.g., CODE001, CODE002) as they're easily guessable. Set appropriate usage limits and expiry dates in WooCommerce. Track redemption rates per campaign prefix to measure marketing effectiveness.