--- title: "Flat Icon Sets - Solid, Single-Color Icons" product: "Streamline Icons, Illustrations and Elements" url: /flat-icons canonical_url: "https://design.streamlinehq.com/flat-icons" summary: "Download flat icon sets across Core, Flex, Sharp, and Plump. Solid single-color shapes, no gradients or outlines. Free and paid as SVG or PNG." --- # Bold, single-color flat icon sets > Download flat icon sets across Core, Flex, Sharp, and Plump. Solid single-color shapes, no gradients or outlines. Free and paid as SVG or PNG. - **URL**: https://design.streamlinehq.com/flat-icons --- * 4 flat styles: Core, Flex, Sharp, and Plump * Solid single-color shapes, no gradients or outlines * Recolor to your brand in one click with SVG [Download flat icon sets](https://www.streamlinehq.com/icons) ## Use flat icon sets in three easy steps ### Pick a flat set Choose Core Flat, Flex Flat, Sharp Flat, or Plump Flat depending on how rounded or geometric you want the shapes. ### Export as SVG or PNG SVG keeps the fill editable to match your brand color. PNG is ready to drop in as-is. ### Drop into your project Works in Figma, Webflow, slide decks, or any tool that accepts SVG or PNG. ## Core Flat icon set The Helvetica of icons. Solid single-color fill on a neutral 14px grid. * **Core Flat**: [998 free icons](https://www.streamlinehq.com/icons/core-flat-free), [5,615 pro icons](https://www.streamlinehq.com/icons/core-flat) ## Where Core Flat icons get used ### Dashboards and dense UI One solid color per icon keeps a busy interface calm. No gradients or strokes competing with the data around them. ### Sidebar navigation and toolbars Core Flat stays neutral and compact, built to disappear into the interface and let the content lead. ## Flex Flat icon set Smooth organic curves, filled solid. Approachable without going fully playful. * **Flex Flat**: [499 free icons](https://www.streamlinehq.com/icons/flex-flat-free), [5,615 pro icons](https://www.streamlinehq.com/icons/flex-flat-style) ## Where Flex Flat icons get used ### Social graphics and slide decks A single flat color reproduces perfectly on any background, screen, or printer, no anti-aliasing artifacts. ### Product and lifestyle contexts Flex Flat's soft, organic shapes feel natural alongside photography and lifestyle imagery. ## Sharp Flat icon set Pure geometry, no curves, filled solid. Bold and high-contrast. * **Sharp Flat**: [500 free icons](https://www.streamlinehq.com/icons/sharp-flat-free), [5,616 pro icons](https://www.streamlinehq.com/icons/sharp-flat-style) ## Where Sharp Flat icons get used ### Posters and bold editorial layouts Flat shapes hold up at large sizes and in print, where fine linework or gradients would get lost or muddy. ### Wayfinding and technical systems Sharp Flat's hard angles carry a strong, technical identity in signage and large-format print. ## Plump Flat icon set Chunky, rounded, cartoon-inspired shapes, filled solid. * **Plump Flat**: [500 free icons](https://www.streamlinehq.com/icons/plump-flat-free), [5,369 pro icons](https://www.streamlinehq.com/icons/plump-flat-style) ## Where Plump Flat icons get used ### Friendly, approachable products Plump Flat rounds every shape for a warmer feel, ideal for onboarding, education, and consumer apps. ### Worksheets and Etsy-style graphics Chunky rounded shapes that feel instantly approachable, popular for teacher worksheets and product graphics. ## Works in your tools * [Mac App](https://home.streamlinehq.com/plugins/download): Drag and drop icons directly into any app * [Figma](https://www.figma.com/community/plugin/852192486284901337): Browse and insert icons without leaving Figma * [Framer](https://www.framer.com/marketplace/plugins/core-icons-by-streamline/): Use icons natively in Framer projects * [Webflow](https://webflow.com/apps/detail/streamline-icons): Add icons directly to Webflow sites * [VS Code](https://marketplace.visualstudio.com/items?itemName=streamline.streamline-icons): Insert icons as SVG or JSX in editors * [Lucid](https://lucid.co/marketplace/01f05f6d/streamline-icons-illustrations-emojis-and-elements): Add icons to your Lucidchart diagrams * [Miro](https://miro.com/marketplace/streamline/): Drop icons into your Miro boards * [Adobe Express](https://adobesparkpost.app.link/TR9Mb7TXFLb?addOnId=w165n33k3): Use icons in Adobe Express projects ## Get all flat icon sets with Pro Free sets cover thousands of icons. Pro unlocks the full library across every family. ### Free: $0 * 109,582 icons * Mandatory attribution * All plugins, web app, MCP and API (limited) * Adjust size, color and format [Get started](https://www.streamlinehq.com/free) ### Pro subscription: $19 per month * 333,032 pro icons on top * Full resolution PNG exports * 58 pro sets in 11 families * All plugins, web app, MCP and API * Pay monthly or yearly [Get Pro](https://www.streamlinehq.com/pricing) ### One-time purchase: Lifetime * Buy once, own forever * Future assets included * All source files as a ZIP * All plugins, web app, MCP and API * No renewal fees [Get Lifetime](https://www.streamlinehq.com/lifetime) ## What makes an icon "flat" A flat icon is a solid, single-color shape with no outline, no gradient, and no shadow. That restraint is the point: flat icons stay legible at any size, reproduce cleanly on any background, and never fight for attention with the content around them. Streamline draws flat as one of the core style variants across four families, so you get the same icon concept in a consistent flat treatment no matter which family fits your brand. ## Four flat styles, one grid each Core Flat is neutral and compact, built for interface work. Flex Flat softens every corner for a friendlier feel. Sharp Flat keeps hard angles for a bold, technical look. Plump Flat goes further, chunky and rounded for playful, approachable projects. Every flat set is drawn by the same team on the same underlying grid as its Line and Duo counterparts, so switching between styles later never means rebuilding your icon system from scratch. ## Frequently asked questions Quick answers to common questions about flat icons. ### What is a flat icon? A flat icon is a solid shape filled with a single color, with no outline, gradient, or shadow. The style favors clean, minimal shapes that stay legible at any size and reproduce reliably across screens and print. ### Where can I download flat icon sets? Visit [streamlinehq.com/icons](https://www.streamlinehq.com/icons) and filter by style to browse Core Flat, Flex Flat, Sharp Flat, and Plump Flat. Download as SVG to keep the fill color editable, or PNG for a ready-to-use image. ### Are these flat icon sets free? Yes. Every flat family has a free tier of 499 to 998 icons as SVG and PNG, no card required. Pro unlocks the full library of 5,600+ icons per style. ### Which flat style should I use? Core Flat is the safest default for interface and product work. Flex Flat suits friendlier, lifestyle-adjacent brands. Sharp Flat fits bold, technical, or editorial contexts. Plump Flat works best for playful, education, or Etsy-style graphics.