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Unique Code Generator

Used by developers, writers, and creators worldwide.

A unique code generator saves hours of manual work when you need formatted alphanumeric codes for tickets, vouchers, serial numbers, or promo campaigns. Define your pattern using three placeholders — X for a letter, 0 for a digit, # for either — and any separator characters you type are preserved exactly. Need XXX-0000-XXX? That's what you get. Each batch produces up to 200 codes, all unique within the batch. Ambiguous characters like O, I, l, and 0 are automatically removed to cut scanning and transcription errors. Toggle uppercase on for clean printed codes, or off when the codes will appear in URLs or app-generated tokens.

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How to use

  1. Choose your options above
  2. Click Generate
  3. Copy your result

Detailed instructions

  1. Enter your desired code format in the Format field using X for letters, 0 for digits, and # for either.
  2. Set the Count field to how many unique codes you need, up to 200 per batch.
  3. Choose Yes or No for Uppercase depending on whether your use case requires capital letters.
  4. Click Generate to produce the full batch of unique, formatted codes instantly.
  5. Use the copy button to copy all codes to your clipboard, then paste into your spreadsheet or platform.

Use Cases

  • •Printing 150 unique ticket codes for a festival and importing them into Eventbrite for validation
  • •Generating one-time discount codes in format XX-0000-XX for a Shopify promotion across two ad campaigns
  • •Creating software license keys in a XX-XXXX-XXXX-XX pattern for a digital product checkout flow
  • •Seeding a PostgreSQL staging database with 200 referral codes to test a sign-up attribution pipeline
  • •Producing asset tags in format 0000-XXX for physical inventory items tracked in a Google Sheet

Tips

  • →For printed vouchers, keep codes under 12 characters total — shorter codes reduce manual entry errors at point of redemption.
  • →Use a format with at least two letter segments and one digit segment, like XXX-0000-XX, to make codes look structured and professional.
  • →If codes will be used as URL parameters, switch uppercase off so they blend into the URL without needing case-normalisation on your server.
  • →Run multiple batches and import them into a spreadsheet to check for cross-batch duplicates using a COUNTIF formula before distributing.
  • →For inventory tags or asset labels, mirror your internal naming convention in the separator pattern, e.g., XX-00000 to match a department prefix style.
  • →The # placeholder is useful when you want a denser character space without making codes look purely numeric or purely alphabetical.

FAQ

how do I create a custom code format with letters and numbers

Type your pattern into the Format field using X for a random letter, 0 for a digit, and # for either. Any other character — hyphen, slash, dot — is kept as a literal separator. So XXX-0000-XXX produces codes like KM-7392-BR, and you can make the pattern as long or short as your use case needs.

are the generated codes unique enough to use for real tickets or vouchers

Every code in a single batch is guaranteed unique. For paid tickets or single-use vouchers, use a format with at least 10–12 variable characters to keep the collision probability negligible across multiple batches. A pattern like XXX-0000-XXX gives you tens of billions of possible combinations, which is more than enough for most campaigns.

why are some letters and numbers missing from my codes

The characters O, I, l, and 0 are excluded automatically because they're easy to confuse when printed, typed, or scanned. Removing them cuts redemption errors without noticeably reducing the number of possible unique codes — the pool is still large enough for virtually any batch size.