Security & Crypto Tools
NanoID Generator
Generate crypto-safe, URL-friendly NanoIDs.
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What is NanoID?
A NanoID generator using the same 64-character URL-safe alphabet as the popular library, with crypto-safe randomness.
How it works
Each character is drawn from the NanoID alphabet using crypto.getRandomValues bytes, with a configurable length (default 21).
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Compact database keys
Generate a NanoID for a database key or URL slug — around 21 characters from the URL-safe alphabet.
Common mistakes
Shrinking the length
Shorter IDs are more guessable. Keep 21+ characters for public identifiers and reduce length only for internal, low-risk uses.
Frequently asked questions
What alphabet does NanoID use?
A URL-safe 64-character alphabet (A-Za-z0-9_-), so IDs work in URLs and filenames without escaping.
How does it compare to UUID?
NanoIDs are shorter and URL-safe by default; UUIDs are standardized with wider ecosystem support. Both are fine for uniqueness.