▚ sandboxmax

Custom NanoID String Generator

NanoIDs pack more entropy per character than UUIDs by drawing from a 64-symbol URL-safe alphabet — a 21-character NanoID is comparably collision-proof to a 36-character UUID at nearly half the length. Tune the length slider to trade compactness against safety; the entropy banner shows the collision math live.

runs 100% in your browser — secure entropy, zero transmission

  1. 1Configure the batchPick UUID v4 or NanoID, set the quantity (up to 5,000), and tune case, hyphens, and prefix/suffix.
  2. 2Generate instantlyOne click pulls secure entropy from the crypto Web API — the timer proves it takes milliseconds.
  3. 3Copy or downloadGrab the whole pack to your clipboard or save it as a .txt file, one ID per line.

ID type

15,000

Formatting

0

IDs generated

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collision risk

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generated in

Entropy comes from your browser’s crypto Web API — generated on your CPU, never transmitted, never logged.

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Is it safe to paste sensitive data into the Custom NanoID String Generator?

Yes. The Custom NanoID String Generator runs 100% client-side inside your browser thread — nothing you paste is uploaded, logged, or transmitted. SandboxMax is a static site with no backend server, no cookies, and no trackers: open your browser's network panel while you work and you'll see zero requests leave the tab.