Random Alphanumeric Generator for Custom Code Creation
Create random alphanumeric strings using uppercase letters, lowercase letters, numbers, or a combination of both. Choose whether to exclude look-alike characters such as 0, O, 1, l, and I to make codes easier to read. A unique option is available, and you can generate a batch instead of creating values by hand.
The Random Alphanumeric Generator creates strings from uppercase letters (A–Z), lowercase letters (a–z), and numbers (0–9). Choose the character case that fits your task, and generate individual values or a batch at once. It is useful when you need sample strings without making them up by hand.
The available options let you select uppercase, lowercase, or both, and optionally exclude characters that can be confused with one another: 0, O, 1, l, and I. Excluding these look-alikes can make generated codes easier to read. A unique option is also available when you need generated values to be unique.
Alphanumeric strings combine letters and numbers, making them useful as compact sample values across many development tasks. Generating them can save time when preparing test fixtures or seed data, while choosing the character case and look-alike setting helps you tailor the values to how they will be used. The unique option can also help when a batch needs distinct values.
The generator runs entirely in your browser, so generated values are processed on your own device and nothing is uploaded, stored, or sent to a server. Once the page has loaded, it works offline without a server connection. Use it for everyday development tasks when you need random alphanumeric examples quickly, whether you are preparing tests, assembling sample data, or creating readable codes.
Step 1: Choose the character case for your strings: uppercase, lowercase, or both.
Step 2: Decide whether to exclude look-alike characters such as 0, O, 1, l, and I. Removing these characters can make codes easier to read and share.
Step 3: Enable the unique option if you need unique generated values.
Step 4: Generate your strings. You can create a batch at once instead of making each value by hand.
Step 5: Copy the values you need for your tests, fixtures, seed data, or other tasks.
Use case: Create random alphanumeric values for tests, fixtures, or seed data without inventing sample strings by hand.
Use case: Generate a batch of values at once when a test setup or mock dataset needs several examples.
Use case: Use randomly generated strings instead of keyboard guesses when you need sample values for development.
Use case: Exclude look-alike characters to make codes easier to read when sharing them with teammates or entering them manually.
Use case: Generate unique values for a batch of test records when duplicate sample values would make the test data less useful.
Use case: Prepare readable alphanumeric examples for documentation, demos, or other non-sensitive development materials.