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Unknown icons

4 icons carry the tag unknown, across Interface, Data Engineering and Security. Document question, Mail question, Null and 1 more — each in outline and duotone at three weights, with the code for React, Vue, Svelte, Flutter and more.

The 4 unknown icons, described

Document questiondocument-question
A document with a question mark on it — an unknown file, its type or contents not yet known.
Mail questionmail-question
An opened envelope with a question mark in its pocket — mail of unknown origin.
Nullnull-value
Null — the absence of a value, which is not zero and not empty text.
Shield questionshield-question
A shield with a question mark on it — protection unknown, a policy not yet decided.

In code, each is one import — import { DocumentQuestion } from "@iconmind/react/icons/document-question" — and the same name in Vue, Svelte, Solid, Preact, React Native, Astro, Blade and Flutter.

Tags these icons also carry

Every unknown icon, free to ship

4 of 2,437 icons compiled from one grid — outline and duotone, three weights, every cell generated rather than redrawn. MIT licensed: commercial use, no attribution, no seat count.