---
title: "Flex Duo - Free Icons Set - 499 customizable PNGs, SVGs, PDFs"
product: "Streamline Icons, Illustrations and Elements"
url: /icons/flex-duo-free
canonical_url: "https://www.streamlinehq.com/icons/flex-duo-free"
summary: "[Free + Open-source] Flex is all about the curves. Its smooth curves brings fluidity and dynamism to your designs with a modern appeal. The Duo style is perfect for projects that require differentiation between actions, using color to convey meaning effectively. It also allows you to customize the line thickness. All Flex Duo icons are designed on a 14px grid with a 1px default stroke and two customizable colors. Licensed under the Creative Commons - CC BY 4.0"
---

# Flex Duo - Free

[Free + Open-source] Flex is all about the curves. Its smooth curves brings fluidity and dynamism to your designs with a modern appeal. The Duo style is perfect for projects that require differentiation between actions, using color to convey meaning effectively. It also allows you to customize the line thickness. All Flex Duo icons are designed on a 14px grid with a 1px default stroke and two customizable colors. Licensed under the Creative Commons - CC BY 4.0

License: Free

## Categories

- [Interface Essential](/icons/flex-duo-free/interface-essential)
- [Images Photography](/icons/flex-duo-free/images-photography)
- [Money Shopping](/icons/flex-duo-free/money-shopping)
- [Programming](/icons/flex-duo-free/programming)
- [Computer Devices](/icons/flex-duo-free/computer-devices)
- [Phone](/icons/flex-duo-free/phone)
- [Mail](/icons/flex-duo-free/mail)
- [Map Travel](/icons/flex-duo-free/map-travel)
- [Food Drink](/icons/flex-duo-free/food-drink)
- [Nature Ecology](/icons/flex-duo-free/nature-ecology)
- [Entertainment](/icons/flex-duo-free/entertainment)
- [Shipping](/icons/flex-duo-free/shipping)
- [Culture](/icons/flex-duo-free/culture)
- [Health](/icons/flex-duo-free/health)
- [Work Education](/icons/flex-duo-free/work-education)
- [Artificial Intelligence](/icons/flex-duo-free/artificial-intelligence)

## Example icons

- [3d Coordinate Axis](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/interface-essential/3d-coordinate-axis-ewpsvt78kvr4ts1o1isdfn.png/3d-coordinate-axis-co4h56vtsb80f3nyxxjwp7.png?_a=DATAiZkSZAA0)
- [3d Rotate 1](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/interface-essential/3d-rotate-1-k9aniufrpmpofackh6q9ba.png/3d-rotate-1-go992kl9wvj1x1kovd266y.png?_a=DATAiZkSZAA0)
- [3d Rotate Y Axis](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/interface-essential/3d-rotate-y-axis-zno76day5uyf2nyz8wmy.png/3d-rotate-y-axis-pfl2oo3qrkkggd346ek1uh.png?_a=DATAiZkSZAA0)
- [Align Back 1](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/interface-essential/align-back-1-xiwyil5onslelvwp44r69.png/align-back-1-0qp0pl4zqjpny1kx0prta.png?_a=DATAiZkSZAA0)
- [Align Selection](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/interface-essential/align-selection-fa7hg4ja83pevs96eg77ql.png/align-selection-pfe5smo4vcrcatsz73q4n.png?_a=DATAiZkSZAA0)
- [Align Text Top](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/interface-essential/align-text-top-fjdeoygky2ugu6mcdel5.png/align-text-top-8cayvhananw07weq3iz277.png?_a=DATAiZkSZAA0)
- [Align Top 1](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/interface-essential/align-top-1-esgw1x7lbg9cqdwi37eek.png/align-top-1-j5yhnqisrenkjif8g8a4ks.png?_a=DATAiZkSZAA0)
- [Archive Box](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/interface-essential/archive-box-pxygyc35fhrrzb4rd3366g.png/archive-box-ad64bdxmmojcx8y8ec3ng.png?_a=DATAiZkSZAA0)
- [Arrow Cursor 2](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/interface-essential/arrow-cursor-2-6qd1jkwr2q26ijsqp33n7.png/arrow-cursor-2-uhl8del537d53370kyrij9.png?_a=DATAiZkSZAA0)
- [Arrow Cursor Click 2](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/interface-essential/arrow-cursor-click-2-psio2w12vxrdgagb79sdo.png/arrow-cursor-click-2-j2syb6mi8sy4kyspa107d.png?_a=DATAiZkSZAA0)
- [Arrow Cursor Move](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/interface-essential/arrow-cursor-move-vrldqoyw5gd145aalv8xrx.png/arrow-cursor-move-4eev5g7w2pi6vqsysx0z8m.png?_a=DATAiZkSZAA0)
- [Arrow Expand](https://assets.streamlinehq.com/image/private/w_34,h_34,ar_1/f_auto/v1/icons/interface-essential/arrow-expand-beqyi2q0m57cxj9j4pa0v4.png/arrow-expand-1mck3a612qielrj62rykn.png?_a=DATAiZkSZAA0)

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