Character types

Digits (0–9) Lowercase (a–z) Uppercase (A–Z) Symbols (!@#$%^&*-_=+)

Characters:

Character types

Digits (0–9) Lowercase (a–z) Uppercase (A–Z)

Groups: Chars per group:

Characters:

Your generated code is:

—

Choose a type and click Generate!

What Is a Random Code Generator?

A random code generator is an online tool that creates unique strings of characters — letters, numbers, or both — in a format you define. Unlike a random number generator (which produces plain numeric values), a code generator produces structured alphanumeric strings that can be used for identification, authentication, and promotions.

Every code is generated using a cryptographically secure random algorithm to ensure results are statistically unbiased, non-sequential, and extremely difficult to guess. This makes them suitable for security-sensitive applications like voucher codes, serial numbers, and one-time passwords.

Our tool lets you configure code length (4–24 characters), character type (alphanumeric, numeric, letters only), letter case, separators for readability (e.g. XXXX-XXXX), and custom prefix / suffix to brand or organize your codes by campaign. You can generate a single code or up to 500 unique codes in one click.

How to Use the Random Code Generator

Generating your first batch of codes takes under 30 seconds:

Choose Character Type

Select A–Z 0–9 for full alphanumeric, 0–9 only for numeric PINs, or A–Z only for letter-based codes.

Set Code Length

Drag the slider to your desired length. 6–8 characters suits most promotions; 12+ characters is recommended for security keys.

Add Prefix / Suffix

Optionally type a prefix like SUMMER- or suffix like -2025 to brand or segment your codes by campaign.

Set Quantity

Enter how many unique codes you need — from 1 to 500 per batch. All codes are guaranteed unique within the batch.

Generate & Export

Press Generate. Copy codes to clipboard with one click, or download as a CSV file ready to import into your platform.

What Can You Use a Random Code Generator For?

Random codes are versatile. Here are the most common real-world applications:

🏷️

Coupon & Discount Codes

Generate unique coupon codes for e-commerce promotions. Each customer gets a single-use code, preventing sharing and abuse of discounts.

🎁

Gift Card & Voucher Codes

Create gift card numbers or event voucher codes in bulk. Set a numeric-only charset with a ####-####-#### pattern to match standard gift card formats.

📦

Product Serial Numbers

Assign unique serial numbers to physical or digital products for inventory tracking, warranty validation, and anti-counterfeiting.

🔗

Referral & Affiliate Codes

Generate unique referral codes for each member of your program. Short, readable alphanumeric codes work best for manual sharing.

🔐

Temporary Passwords & PINs

Create one-time passwords, temporary login PINs, or reset codes. Use longer lengths and mixed case for stronger security.

🎟️

Lottery & Raffle Tickets

Assign unique ticket codes to raffle participants. Use the Lucky Draw tool alongside to then pick the winning code fairly.

🎰

Promo Code Campaigns

Generate bulk promo codes for email campaigns, influencer partnerships, or QR code promotions. Add a campaign prefix for easy tracking.

🧪

Developer Testing & QA

Generate test data — order IDs, user tokens, transaction references — for software testing, database seeding, and API validation.

Types of Random Codes You Can Generate

Different use cases require different code formats. Here's a breakdown of the most useful code types and their recommended settings:

Code Type	Best For	Example Format	Recommended Length
Alphanumeric	Coupon codes, promo codes, referral codes	GIFT-A3K9-B7PX	8–12 chars
Numeric Only	PINs, OTPs, lottery numbers, gift card digits	7291-4805	6–8 chars
Letters Only	Readable codes, memorable vouchers	XKRB-MWZJ	8–10 chars
Uppercase Alphanumeric	Serial numbers, product keys	SN-4A2B-9C7D-E1F3	12–16 chars
Mixed Case Alphanumeric	Passwords, API tokens, security keys	aX7Qp2mZ	12–24 chars
Prefixed Code	Campaign tracking, event segmentation	SUMMER-7KX9-P2QR	8 chars + prefix

Best Practices for Generating Random Codes

Getting the most out of a random code generator means choosing settings that match your security and usability goals:

📏

Use 8+ Characters for Security

Shorter codes (4–6 chars) are easier to guess. For public-facing promo codes, 8 characters gives billions of possible combinations, making brute-force attempts impractical.

🏷️

Add a Campaign Prefix

Prefixes like XMAS- or VIP- make codes instantly recognizable and help filter redemptions in your CMS or spreadsheet.

👁️

Avoid Ambiguous Characters

Characters like 0 (zero) vs O (letter O), or 1 vs l, cause customer confusion. Use uppercase-only alphanumeric sets to minimize errors.

➖

Use Hyphens for Readability

Separating code groups with hyphens (e.g. ABCD-1234-EFGH) makes them easier to read aloud, type, and share without errors.

📊

Export to CSV for Bulk Use

Download your batch as a CSV to import directly into Shopify, WooCommerce, Klaviyo, Mailchimp, or any other platform that accepts discount code lists.

🔒

Track Redemptions Externally

Our generator creates the codes — to prevent reuse in a live campaign, import them into your platform or a spreadsheet that marks each code as "used" upon redemption.

Random Code Generator vs Random Number Generator

These two tools are related but serve different purposes — here's when to use each:

Random Code Generator (this page) — Creates structured alphanumeric strings in a format you define. Used when you need an ID, token, voucher, password, serial number, or any code meant to be shared, stored, or validated. The output is a string like PROMO-7AX9-K3BQ.

Random Number Generator — Produces a plain integer within a min/max range. Used for statistics, simulations, games, raffles, sampling, or any scenario requiring a simple numeric value. The output is a number like 47.

If you need to run a raffle with your generated codes, combine both tools: generate unique codes here, distribute them to participants, then use our Lucky Draw tool to pick the winning code from the list.

Frequently Asked Questions — Random Code Generator

What is a random code generator?▾

A random code generator is a free online tool that creates unique strings of characters — letters, numbers, or both — in a format you specify. These codes are used as coupon codes, voucher codes, promo codes, serial numbers, gift card codes, referral codes, PINs, and one-time passwords.

How do I generate random coupon codes?▾

Select "A–Z 0–9" character type, set length to 8, add a prefix like SAVE- or SUMMER-, set your quantity (up to 500), then click Generate. Download the result as a CSV and import it into Shopify, WooCommerce, or any e-commerce platform that accepts bulk discount codes.

Are generated codes guaranteed to be unique?▾

Yes — all codes within a single generated batch are deduplicated. For 8-character alphanumeric codes, the number of possible combinations exceeds 2.8 trillion, making accidental duplication across separate batches extremely unlikely.

What is the most secure code format?▾

For maximum security, use mixed case alphanumeric (A–Z, a–z, 0–9), 12 characters or more, and no separator. This gives over 3.2 quadrillion possible combinations. For public-facing codes that users type manually, 8-character uppercase alphanumeric with a hyphen separator balances security with usability.

Can I add a prefix to my codes?▾

Yes. The Prefix field lets you prepend any text to every generated code — for example, PROMO-, GIFT-, or WINTER2025-. The Suffix field adds text at the end. These do not affect randomness; they are fixed strings added around the random portion.

How do I generate gift card codes?▾

For gift card codes, select "0–9 only" for a numeric format or "A–Z 0–9" for alphanumeric, set length to 16, and choose hyphen as the separator to get a format like 4521-8890-3341-7762. Download as CSV and import into your POS or gift card management system.

Is this random code generator free?▾

100% free with no sign-up and no usage limits. Generate up to 500 unique codes per batch, as many batches as you need, at no cost.

What is the difference between a promo code and a coupon code?▾

Practically speaking, promo codes and coupon codes are the same thing — a unique string a customer enters at checkout to receive a discount or benefit. "Promo code" is more commonly used in digital marketing, while "coupon code" has roots in physical coupon distribution. Both can be generated with this tool.

Random Code Generator