# Nano ID Generator

> Generate compact URL-safe unique IDs — shorter than a UUID with comparable collision safety.

To generate Nano IDs, set the length and alphabet above. A 21-character URL-safe Nano ID carries about 126 bits of entropy — comparable to a UUID v4 — in 21 characters instead of 36, which keeps URLs and database keys noticeably shorter.

**URL:** https://convertto.tech/t/nanoid-generator
**Category:** Hash & Crypto Tools (https://convertto.tech/c/crypto-tools)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Privacy:** Runs entirely in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Set the how many.
2. Set the length.
3. Choose the alphabet.
4. The result appears immediately — copy or download it.

## FAQ

### How does Nano ID compare to a UUID?

It is shorter — 21 characters against 36 — while offering comparable collision resistance, and its alphabet is URL-safe so it needs no encoding. UUID wins on universal recognition and database-native types.

## Related tools

- [UUID v4 Generator](https://convertto.tech/t/uuid-v4-generator): Generate random RFC 4122 version 4 UUIDs in bulk.
- [UUID v7 Generator](https://convertto.tech/t/uuid-v7-generator): Generate time-sortable UUID version 7 identifiers — ideal as database primary keys.
- [Random String Generator](https://convertto.tech/t/random-string-generator): Generate random strings from a chosen character set — for keys, tokens and test data.
- [Password Generator](https://convertto.tech/t/password-generator): Generate strong random passwords using your browser's cryptographic random source.
- [HMAC Generator](https://convertto.tech/t/hmac-generator): Generate an HMAC signature with SHA-256, SHA-1, SHA-384 or SHA-512 and a secret key.
- [Passphrase Generator](https://convertto.tech/t/passphrase-generator): Generate memorable Diceware-style passphrases from random words.
- [Password Strength Checker](https://convertto.tech/t/password-strength-checker): Estimate how long a password would take to crack, and see exactly what weakens it.
- [CSS Clamp Generator](https://convertto.tech/t/css-clamp-generator): Generate fluid clamp() values that scale smoothly between two viewport widths.