Random String Generator
Generate custom random strings for tokens, IDs, testing data & more. Choose charset, length, prefix and format.
How to Use
- Set the Length of the random string (1–1024 characters).
- Choose a Preset — Alphanumeric, Letters, Numbers, Hex, Base64, or Custom.
- Optionally add a Prefix (e.g. tok_, sk_, id_) and set separators.
- Set Quantity to generate multiple strings at once.
- Click Generate and copy with the clipboard button.
Features
6 Presets
Alphanumeric, letters, numbers, hex, base64, custom.
Bulk Generate
Create up to 100 strings at once.
Prefix & Separator
Add prefixes and group characters with separators.
Crypto Secure
Uses Web Crypto API for true randomness.
Use Cases
- API Tokens: Generate secure random tokens for authentication (e.g. tok_a1b2c3d4).
- Test Data: Create random strings for database seeding and test fixtures.
- Session IDs: Generate unique session identifiers for web applications.
- File Names: Create unique random filenames to prevent collisions.
- Hex Colors: Generate random hex values for colors and identifiers.
Benefits
- Cryptographically secure random generation via Web Crypto API.
- 6 preset character sets plus custom charset option.
- Prefix support for creating formatted tokens (tok_, sk_, pk_).
- Separator support for readable grouping (xxxx-xxxx-xxxx).
- 100% client-side — nothing leaves your browser.
Random Strings in Development
Random strings are fundamental building blocks in software development. They serve as API keys, session tokens, nonce values, database identifiers, and test data. The NearMeTool Random String Generator uses the Web Crypto API to ensure every string is truly random and unpredictable, making them suitable for security-sensitive applications.
Choosing the Right Character Set
Different use cases call for different character sets. Hexadecimal strings are common for hash values and color codes. Alphanumeric strings work well for URL-safe tokens and file names. Base64-safe strings use the standard Base64 alphabet without padding. For maximum entropy, use the full alphanumeric set with the longest practical length.
Works with Your Developer Tools
For unique identifiers that follow a standard format, use the UUID Generator. Need secure passwords instead? Try the Password Generator with strength meter. Encode your tokens with the Base64 Encoder Decoder. Test your token-based code in the Online Code Editor.
Frequently Asked Questions
Are the strings cryptographically secure?
Yes. The generator uses crypto.getRandomValues() from the Web Crypto API for true randomness.
What is the maximum length?
You can generate strings up to 1024 characters long.
Can I use custom characters?
Yes. Select the "Custom" preset and enter any characters you want to use in the custom charset field.
What do the presets mean?
Alphanumeric = A-Z, a-z, 0-9. Letters = A-Z, a-z. Numbers = 0-9. Hex = 0-9, a-f. Base64 = A-Z, a-z, 0-9, +, /.
How does the separator work?
The separator inserts a character (dash, underscore, or dot) every N characters for readability. Example: a1b2-c3d4-e5f6.
Is my data stored anywhere?
No. Everything is generated in your browser. No data is sent to any server.
Is it free?
Yes, 100% free with no limits.