Interface Essential

Business

Images Photography

Money Shopping

Programming

Computer Devices

Phone

Mail

Map Travel

Food Drink

Nature Ecology

Entertainment

Shipping

Culture

Health

Work Education

Artificial Intelligence

Arrows

Streamline 3.0

Ultimate

Core

Flex

Sharp

Plump

Micro

Freehand

Streamline Material

Nova

Cyber

Streamline Vault

Logos

Pixel

Google Material

Tabler

Remix

Feather

Iconoir

Carbon

Solar

Lucide

Brand Logos

Bootstrap

Atlas

Unicons

Ionic Icons

Phosphor

MingCute

Font Awesome

Majesticons

Mynaui

Radix

Heroicons

Flagpack

Core Solid - Free

Iron

Flex Line - Free

Core Remix - Free

Core Line - Free

Core Flat - Free

Core Gradient - Free

Core Duo - Free

Core Neon - Free

Core Pop - Free

Flex Flat - Free

Plump Solid

Hotel

Plump Duo

Sharp Line

Flex Line

Flex Solid

Ultimate Light

Periodic Table

Ultimate Bold

Ultimate Regular

Sharp Line - Streamline Material

Household

Core Line

Outlined Line - Streamline Material

Platinum

Home

Plump Pop

Plump Neon

Plump Gradient

Plump Remix

Plump Flat

Core Neon

Core Gradient

Core Flat

Core Remix

Core Duo

Core Pop

Core Solid

Sharp Solid

Sharp Duo

Sharp Flat

Sharp Gradient

Sharp Neon

Sharp Pop

Sharp Remix

Plump Line

Rounded Line - Streamline Material

Micro Line

Micro Solid

Flex Duo

Flex Pop

Flex Remix

Flex Gradient - Free

Flex Gradient

<p>Core is the Helvetica of icons. Each icon is stripped to its essential form and has generous inner spacing. The Line variant offers a clean, minimalist approach with consistent line weights.</p>

**Summary**: The definitive neutral UI icon — 1px rounded stroke on a 14px grid, stripped to essential form, designed to be invisible infrastructure that serves content rather than demanding attention. Scores at a genuine midpoint on its human↔mechanical character, achieved by no other sub-style in the catalog, and is one of the softer sub-styles available, reflecting a construction so minimal that almost no visual personality remains. The tone signals pure infrastructure: "we are here if you look; we won't demand that you do." Best for productivity tools, component libraries serving diverse audiences, admin panels, and any product with a strong typographic or illustration identity that must not compete with its icon layer.

**Last updated**: 2026-04-23

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## Fit & Recommendation

### Primary use cases

- Universal UI navigation and controls where icons should be invisible infrastructure
- Any product that values neutrality above personality — icons adapt to the surrounding design system rather than imposing character
- Productivity tools (task managers, note apps, calendar apps) where cognitive clarity is primary
- Component libraries needing icons that work alongside any colour token system without clashing
- Products with very strong typographic or illustration identity — Core Line will not compete
- Internal tools and admin panels that prioritise clarity without brand personality

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## Brand & Cultural Identity

### What it communicates

> "We are infrastructure. You won't notice us, and that is the point."

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## Visual & Technical Specs

### Visual properties

| Property | Value |
|----------|-------|
| Stroke weight | 1px |
| Fill | None |
| Corner treatment | Rounded caps and joins throughout |
| Color | Monochrome |

### Emotional Scores

Core Line is somewhat warm and one of the softer sub-styles in the catalog — the 1px stroke on a 14px grid produces one of the lightest, most unobtrusive icon constructions available. It is somewhat friendly and somewhat playful. On its human↔mechanical character, it sits at a near-neutral midpoint — the only sub-style in the catalog to land at this precise balance point, where rounded ends give a slight human quality and strict minimal construction gives a slight systematic quality in equal measure.

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## Pairing & Compatibility

### Typography pairing

- **Primary**: Inter — the pairing is almost tautological; two neutral humanist systems designed for UI at the same level of philosophical reduction
- **Alternative**: DM Sans — slightly more personality than Inter, compatible with Core's rounded geometry
- **Editorial**: Neue Haas Grotesk — Swiss neutrality in type matches the stripped Swiss construction in icons
- **Body**: Source Sans Pro or Mulish — clean, screen-optimized, non-competing
- **Avoid**: Display fonts with strong personality (Syne, Playfair Display) — contrast between expressive type and invisible icons creates incoherence


<p>The Helvetica of icons. Core is stripped to essential form with generous spacing. It's a timeless workhorse for interface design.</p>

Minimal icons

Iron icon - Core Line Set

Download Iron SVG vector or transparent PNG icon in Line, Minimal, Stroke, Wireframe style(s) for Sketch and Figma. It belongs to Core Line vectors SVG collection.