“Timeless design is so hard to achieve, but we’ve been using Streamline icons for 8 years now and they haven’t aged a day. An instant classic.”
Clean, minimal simple icon sets
- 5 simple styles: Core, Flex, Sharp, Plump, and Micro
- One clean stroke, no fill or color needed
- Adjustable stroke weight in every SVG
Adjust stroke weight
Browse all simple icon sets
Five families, one minimal line treatment each.
Core Line
Flex Line
Sharp Line
Plump Line
Micro Line
Use simple icon sets in three easy steps
Pick a simple set
Core, Flex, Sharp, Plump, or Micro. Same minimal single-stroke treatment, different grid and corner style.
Adjust stroke weight
Line icons support adjustable stroke thickness in SVG, so you can match your interface’s visual weight.
Drop into your project
Works in Figma, code, slide decks, or any tool that accepts SVG or PNG.
Where simple icons work best
Dense dashboards and tables
Minimal shapes read fast in dense layouts, where filled or colored icons would add visual noise.
Sidebar navigation and toolbars
A single thin stroke stays out of the way. Simple icons annotate the interface instead of competing with it.
Inline with body text
Line weight matched to your font stays legible next to text at small sizes, without feeling heavier than the copy around it.
Wireframes and diagrams
Clean single-stroke icons work as placeholders and finished assets alike, so a diagram never needs a second pass.
Streamline icons are the secret tool behind 50,000 product teams
“Happy to work with such a great resource like Streamline icons. Makes it so easy to use icons in Figma!”
“I use Streamline icons for all my projects. Me and my clients love them. They’re so versatile and there are soooo many to choose from. I highly recommend them for any type of web, app, design or illustration project”
Get more PNG icons with Pro
Free sets cover thousands of icons. Pro unlocks the full library across every family.
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- Mandatory attribution
- All plugins, web app, MCP and API (limited)
- Adjust size, color and format
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- 333,032 pro icons on top
- Full resolution PNG exports
- 58 pro sets in 11 families
- All plugins, web app, MCP and API
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One-time purchase
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- Future assets included
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What makes an icon “simple”
A simple icon is a single-weight line with no fill, no color, and no extra detail beyond what the shape needs to be recognized. That restraint keeps the icon legible at small sizes and quiet next to text, which is why line icons are the default choice for interface work.
Streamline draws a Line variant for every family, all built on the same underlying grid as the family’s other styles, so a simple icon today can grow into a filled or colored one later without redrawing anything.
Five line styles, one consistent stroke
Core Line is the neutral, everyday choice for interface work. Flex Line softens corners for a friendlier feel. Sharp Line keeps hard angles for a technical look. Plump Line rounds further for playful contexts, and Micro Line is purpose-built for the smallest sizes on a 10px grid.
Every stroke is adjustable in SVG, so the same icon can sit thin and quiet in a dense table or thicker and bolder in a hero section, without switching sets.
Frequently asked questions
Quick answers to common questions about 16px icons.
What is a simple icon?
A simple icon is a minimal, single-stroke line icon with no fill and no color. It uses the fewest shapes needed to stay recognizable, which keeps it legible at small sizes and unobtrusive next to text.
Where can I download simple icon sets?
Visit streamlinehq.com/icons and filter by the Line style across Core, Flex, Sharp, Plump, and Micro. Download as SVG to keep the stroke weight adjustable, or PNG for a ready-to-use image.
Can I change the stroke weight?
Yes. Line icons are exported as SVG with an editable stroke, so you can thicken or thin the line in your design tool or code to match your interface’s visual weight.
Are these simple icon sets free?
Yes. Every Line set has a free tier of 200 to 998 icons as SVG and PNG, no card required. Pro unlocks the full library, from 2,000+ icons on Micro up to 5,600+ on Core, Flex, Sharp, and Plump.