---
title: "Unknown Document Icon | Free Download PNG & SVG | Material Pro Line"
product: "Streamline Icons, Illustrations and Elements"
url: /icons/download/unknown-document--32243
canonical_url: "https://www.streamlinehq.com/icons/download/unknown-document--32243"
summary: "Clean line icon of a document with a question mark in a circle. Used for unknown files and help."
---

# Unknown Document icon

The Unknown Document icon shows a document with a folded corner and a question mark inside a circle. Drawn in the line style on a 24px grid so it stays clear at small sizes. Use it for unknown files, missing documents, help prompts, and file-related error states. It belongs to Material Pro Line set in the Streamline Material family.

## Preview

![Clean line icon of a document with a question mark in a circle. Used for unknown files and help.](https://assets.streamlinehq.com/image/private/w_240,h_240,ar_1/f_auto/v1/icons/text-formatting/unknown-document-tbj8lbo4fpndl2dcfj1avb.png/unknown-document-z6mgbftybo8kbaik4c6b9.png?_a=DATAiZkSZAA0)

## Details

- **Name**: Unknown Document
- **Type**: Icon
- **Set**: [Material Pro Line](/icons/material-pro-line.md) — Google Material Pro offers a versatile collection of high-quality, easily recognizable icons built on Material Design principles, ensuring clarity, consistency, and simplicity for a wide range of digital applications. The Line style is perfect for projects that prioritize simplicity, seamlessly adapting to both light and dark backgrounds. All Material Pro icons are designed on a 24px grid.
- **Family**: [Streamline Material](/icons/material-pro.md)
- **Style**: Line
- **Category**: Text Formatting › Text Formatting
- **Default size**: 24px
- **Pricing**: Pro
- **Author**: [Streamline](https://home.streamlinehq.com/)
- **Formats**: PNG, WEBP, PDF, SVG, JSX
- **Tags**: unknown, document, file, question, unreadable, unsure, text, paper, mystery, error

## Download

- [Download Unknown Document on Streamline](https://www.streamlinehq.com/icons/download/unknown-document--32243)

## Also available in other styles

- [Unknown Document — Outlined Line - Streamline Material](/icons/download/unknown-document--32262.md) (Pro)
- [Unknown Document — Sharp Line - Streamline Material](/icons/download/unknown-document--32893.md) (Pro)
- [Unknown Document — Rounded Line - Streamline Material](/icons/download/unknown-document--32935.md) (Pro)

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