icon-to-image 0.1.4

Fast and high quality Font Awesome icon to image renderer

Icon to Image

A high-performance Rust library with Python bindings for rendering Font Awesome icons to images, with all the customizations you may want. This library natively includes the icons from Font Awesome 7.1.0 Free (solid, regular and brands).

Features:

• Extremely fast icon rendering (~10ms for a 512x512 image)
• Python bindings via PyO3
• No Python dependencies: Pillow is optional only if using as an image object
• Supersampling for high-quality antialiased output (2x by default)
• PNG and WebP output formats, including transparency
• Customizable icon and background colors (hex and RGB/RGBA)
• Flexible icon positioning in large canvases with anchors and offsets
• Command-line interface for both Rust and Python

Disclosure: This library was mostly coded with the assistance of Claude 4.5 Opus. However, I personally have reviewed all code to ensure it is accurate, have added numerous tests and demo examples to ensure it works as both intended and advertised, and have edited documentation and comments to provide greater signal as to how the package operates. I have given this project the same care and attention as I would give a project I have written from scratch.

Installation

Python

pip install icon-to-image

uv pip install icon-to-image

Rust

cargo install icon-to-image

Or, add to your Cargo.toml:

[dependencies]
icon-to-image = "0.1.4"

Command-Line Interface

Both the Rust binary and Python package provide a CLI for rendering icons.

Basic Usage

The list of included icons can be found on Font Awesome's Icon Grid and filtering to "Free" icons. The icon names do not use the fa prefix.

# (Python) View CLI documentation
icon-to-image --help

# (Rust) View CLI documentation
cargo run -- --help

# Render a heart icon to PNG
icon-to-image heart heart.png

# Render with custom color and size
icon-to-image star star.png --color "#FFD700" --size 256

# Render with transparent background
icon-to-image github logo.png --color "#333333" --background transparent

# Output as WebP
icon-to-image rocket rocket.webp --color "#FF6B35"

# Render with rotation (45 degrees clockwise)
icon-to-image arrow-right rotated.png --rotate 45

List and Search Icons

# List all available icons
icon-to-image list

# Search for icons matching a pattern
icon-to-image search arrow

Rust Usage

See the documentation on docs.rs.

Python Usage

See also the demo Jupyter Notebook for more interactive examples.

Basic Rendering

To use render_icon(), you will also need to have Pillow installed.

from icon_to_image import IconRenderer

renderer = IconRenderer()

# Render a heart icon with default settings (512x512, solid weight, black on white)
# render_icon() returns a PIL.Image directly
img = renderer.render_icon("heart")
img.save("heart.png")

Custom Colors

# Red heart on default white background
red_heart = renderer.render_icon(
    "heart",
    icon_color="#FF0000",
)

# Blue star on yellow background
blue_star = renderer.render_icon(
    "star",
    icon_color="#0066CC",
    background_color="#FFD700",
)

# Semitransparent gray ghost on transparent background
gray_ghost = renderer.render_icon(
    "ghost",
    icon_color=(128, 128, 128, 128),
    background_color=None,
)

Brand Icons

github = renderer.render_icon("github", icon_color="#333333")
python = renderer.render_icon("python", icon_color="#3776AB")

Custom Sizes

# Small icon with padding (128px icon on 256px canvas)
small = renderer.render_icon(
    "rocket",
    canvas_width=256,
    canvas_height=256,
    icon_size=128,
    icon_color="#FF6B35",
)

Icon Positioning

# Position icon at bottom-right with padding
badge = renderer.render_icon(
    "check",
    canvas_width=256,
    canvas_height=256,
    icon_size=48,
    horizontal_anchor="right",
    vertical_anchor="bottom",
    offset_x=-16,
    offset_y=-16,
    icon_color="#4CAF50",
    background_color="#E8F5E9",
)

Icon Rotation

# Rotate an arrow 45 degrees clockwise
rotated = renderer.render_icon(
    "arrow-right",
    rotate=45,  # Positive = clockwise
    icon_color="#E91E63",
)

# Rotate counter-clockwise
rotated_ccw = renderer.render_icon(
    "egg",
    rotate=-30,  # Negative = counter-clockwise
    icon_color="#2196F3",
)

Font Styles

Some Font Awesome icons have different styles. You can explicitly specify which style to use:

# Solid style (filled) - default for most icons
solid_heart = renderer.render_icon("heart", style="solid")

# Regular style (outlined)
regular_heart = renderer.render_icon("heart", style="regular")

render_icon() and render_icon_bytes()

render_icon() returns a PIL.Image directly. render_icon_bytes() returns raw encoded bytes (PNG or WebP) without requiring Pillow, which can be useful for tasks such as APIs.

# render_icon() returns PIL.Image (requires Pillow)
img = renderer.render_icon("heart", icon_color="#FF0000")
img.save("heart.png")  # Use PIL's save method

# render_icon_bytes() returns raw bytes (no Pillow needed)
png_data = renderer.render_icon_bytes("heart", icon_color="#FF0000")
with open("heart.png", "wb") as f:
    f.write(png_data)

# render_icon_bytes() supports output format selection
webp_data = renderer.render_icon_bytes("heart", output_format="webp")

Save Directly to File

The save_icon() method writes the image to disk directly from Rust for maximum performance.

renderer.save_icon("check-circle", "check.png", icon_color="#4CAF50")
renderer.save_icon("times-circle", "times.webp", icon_color="#F44336")

Query Available Icons

# Get total icon count
print(f"Total icons: {renderer.icon_count()}")

# List all icons
all_icons = renderer.list_icons()

# Search for specific icons
arrow_icons = [name for name in all_icons if "arrow" in name]

# Check if an icon exists
if renderer.has_icon("heart"):
    print("Heart icon is available")

Rust Usage

use icon_to_image::{IconRenderer, RenderConfig, Color, ImageFormat, encode};

fn main() -> Result<(), icon_to_image::IconFontError> {
    // Use embedded assets
    let renderer = IconRenderer::new()?;

    let config = RenderConfig::new()
        .canvas_size(1024, 1024)
        .icon_size(800)
        .icon_color(Color::from_hex("#FF5733")?)
        .background_color(Color::transparent());

    let (width, height, pixels) = renderer.render("heart", &config)?;
    let png_data = encode(&pixels, width, height, ImageFormat::Png)?;
    std::fs::write("heart.png", png_data)?;

    Ok(())
}

API Reference

Python

Parameters

Applies to both render_icon() and render_icon_bytes():

Parameter	Type	Default	Description
name	str	required	Icon name
canvas_width	int	512	Output width in pixels
canvas_height	int	512	Output height in pixels
icon_size	int	95% of canvas	Icon size in pixels
supersample	int	2	Antialiasing factor (1, 2, or 4)
icon_color	str/tuple	"#000000"	Hex or RGB(A) tuple
background_color	str/tuple/None	"#FFFFFF"	Hex, RGB(A), or None
horizontal_anchor	str	"center"	"left", "center", "right"
vertical_anchor	str	"center"	"top", "center", "bottom"
offset_x	int	0	Horizontal offset in pixels
offset_y	int	0	Vertical offset in pixels
rotate	float	0	Rotation in degrees (+ = clockwise)
style	str/None	None	"solid", "regular", or "brands"

Notes

• This project is a recreation of my four year old Python project, icon-image. However, there were several issues with that project: the generations are slow, the generated icons were annoyingly aliased, and the Pillow code was a mess and prone to breaking. Therefore, I looked to Rust with Python bindings as it addressed all of the above issues: Claude 4.5 Opus handled them all easily. Normally this type of bespoke project would be kept as private personal project as I have a specific need for this workflow for a certain upcoming project, but Claude's generated code was good enough such that it wasn't a huge lift to polish it for public release.
• Normally I would use fontdue for rendering the glyphs as it's more performant, however fontdue does not have the ability to render curves which is very important for most icons.
• This library technically supports using provided Font Awesome files (e.g. the Pro variants) but I do not have access to Pro for testing.

License

MIT

Font Awesome CSS included per its MIT License.

Font Awesome font files included per their SIL Open Font 1.1 License.