Randomizer

Random String Generator

Simplest tool to generate random strings with select the characters set, number of string, length of each string, etc!

Select the characters
Use Character Sets
Custom Characters
Number & length of string
Output Format
Multiple Lines
Single Line

This online tool random string generator provides a comprehensive set of options for creating customized random strings.

Key Features

  • Flexible Character Sources: Choose between predefined character sets (lowercase, uppercase, numbers, symbols) or input your own custom characters for complete control over the output
  • Batch Generation: Generate multiple random strings at once, with configurable quantity (up to 1000 strings) and individual string length (up to 1000 characters)
  • Output Formatting Options: Display results as multiple lines (one string per line) or as a single line with customizable separators (comma, space, pipe, etc.)
  • Quick Actions: Use the Example button to see the tool in action, Generate to create new strings, and Reset to restore default settings
  • Export Capabilities: Export generated strings to CSV format for use in spreadsheets or databases, and print results with formatted headers including generation timestamp and parameters

Common Use Cases

  • Software Development & Testing
    • Creating unique identifiers, session tokens, or API keys
    • Generating test data for databases and applications
    • Producing random passwords for testing authentication systems
  • Security & Authentication
    • Generating temporary passwords for user accounts
    • Creating secure tokens for password reset links
    • Producing random salts for cryptographic operations
  • Data Management
    • Generating unique reference codes for orders, invoices, or tracking numbers
    • Creating placeholder data for database seeding
    • Producing random identifiers for A/B testing or experiments
  • Gaming & Contests
    • Generating unique promo codes or voucher codes
    • Creating random game IDs or room codes
    • Producing lottery or raffle ticket numbers

How to Use

  • Step 1: Choose Your Characters
    • Select either "Use Character Sets" to pick from standard character types (letters, numbers, symbols), or "Custom Characters" to enter your own specific set of characters.
  • Step 2: Configure Generation Parameters
    • Set how many strings you need and how long each one should be. The defaults are 10 strings of 30 characters each, but you can adjust these to match your requirements.
  • Step 3: Select Output Format
    • Decide whether you want each string on a separate line (Multiple Lines) or all strings in one continuous line with a separator of your choice (Single Line).
  • Step 4: Generate
    • Click the "Generate Random Strings" button to create your random strings. They'll appear instantly in the results area.
  • Step 5: Export or Use
    • Copy the strings directly from the results box, export them to a CSV file for use in other applications, or print them with a formatted header for documentation purposes.

Frequently Asked Questions

The strings are generated using JavaScript's built-in random number generator, which provides sufficient randomness for most non-cryptographic purposes like testing, unique identifiers, and general use. For high-security applications requiring cryptographic-grade randomness, consider using specialized security tools.

You can generate up to 1,000 strings at a time, with each string up to 1,000 characters long. For larger batches, simply generate multiple times.

While extremely unlikely with longer strings and larger character pools, duplicates are theoretically possible since generation is random. The probability decreases dramatically with longer string lengths and more diverse character sets.

The CSV export creates a simple single-column file with "Random String" as the header and each generated string in its own row, properly quoted for compatibility with Excel, Google Sheets, and other spreadsheet applications.

Yes! When using the "Custom Characters" option, you can paste any characters you want, including special symbols, accented letters, or even emoji. The tool will randomly select from whatever characters you provide.

The separator is the character or text that appears between each generated string when using Single Line output. Common separators include commas (,), spaces, pipes (|), or semicolons (;). This is useful when you need the strings in a specific format for importing into other systems.

The tool resets to defaults when you refresh the page. However, you can use the Example button to quickly load a preset configuration, then adjust it to your needs.