How to make a URL-safe token
Overview
A practical guide to choosing a token format that is easy to share inside URLs, invite links, and reset links.
Quick answer: Tokens used in URLs should be easy to transport, not just short. If the format does not need manual escaping, sharing and copying become much less error-prone.
1. What URL-safe means
Values placed in URLs become awkward when they include characters like `+` or `/`, because they may need extra encoding or careful copying. A URL-safe format makes invite links or verification links easier to share as-is.
2. Balance length and unpredictability
Short tokens are convenient, but they can also be easier to guess. A good setup keeps enough length for the use case while still using randomness, which also makes rotation and revocation easier later.
- Use characters that survive URLs well
- Balance convenience with security
- Keep tokens separate by purpose
3. Where it helps in practice
It is especially useful for invite links, password reset links, and temporary access URLs that you hand directly to users. Decide early whether the token should live in the query string or the path so the receiving side stays simple.
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