Random Hex Generator

Hexadecimal strings appear everywhere in computing—color codes in CSS (#FF5733), database IDs, cryptographic hashes, and random tokens. This tool 生成s random hex strings of any length, with optional フォーマットting for CSS color codes, making it useful for everything from design prototyping to security token generation.

Hex for colors

The most common use case for random hex is generating random colors. CSS color codes are 6-character hex strings prefixed with # (like #2E8B57). This tool lets you 生成 valid CSS color codes with a single click, complete with live color previews. Perfect for testing color palettes, generating test data with varied colors, or creating random design mockups.

Custom length flexibility

While 6-character hex is standard for colors, you might need other lengths. 4-character hex for short identifiers (16^4 = 65,536 possible values), 8-character for more entropy, 32-character for tokens and session IDs, 64-character for cryptographic applications. The tool supports custom lengths from 1 to 256 characters, covering any use case.

Batch generation

生成 up to 100 random hex strings in a single operation, perfect for populating test data, creating fixture lists, or generating multiple color palettes. Copy all results at once and paste into your code or design tool.

フォーマットting options

Toggle between lowercase (a-f) and uppercase (A-F) hex output based on your requirements. Add a # prefix to 生成 valid CSS color codes. The tool shows live previews for 6-character hex strings, letting you see the colors before copying them.

Non-cryptographic randomness

While the tool uses the Web Crypto API for generation, for color and non-security purposes, the randomness quality is more than sufficient. For security-sensitive applications like tokens, use the Secure Token Generator instead, which offers more control over entropy and フォーマット options.