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Overdriveā¦ Accelerate! š
======================
Optimize your webfont loading! Split a large Unicode font into smaller subsets
(Latin, Cyrillic etc.) and browser will only download the subset needed
for a particular page (using `unicode-range`).
With **Font-Ranger** you can:
- Generate subsets for each language you support
- Use unicode-range subsetting for saving bandwidth
- Remove bloat from your fonts and optimize them for web
- Convert your fonts to a compressed woff2 format
- Provide .woff fallback for older browsers
- Self-host web fonts or use them locally
- Generate CSS file with @font-face rules
- Customize font loading and rendering
Installation
------------
You can install it globally:
```bash
npm i -g font-ranger
```
Or locally:
```bash
npm i --save-dev font-ranger
```
And you can use it without installation (see usage)
**Font-Ranger** requires `fonttools` and `brotli` (for woff2) to be installed on your system.
On Ubuntu:
```
sudo apt install fonttools brotli
```
Using Python:
```
pip install fonttools brotli
```
Usage
-----
`npx` - an official npm tool to run packages. Use it to run `font-ranger` without installation (or with local installation):
```bash
npx font-ranger --help
```
This tool takes your single font file and splits it to multiple subsets using unicode ranges from Google Fonts:
- Latin
- Latin Extended
- Cyrillic
- Cyrillic Extended
- Greek
- Greek Extended
- and other...
For example, you can take 'Roboto-Regular.ttf' and run the following command:
```bash
npx font-ranger -f Roboto-Regular.ttf -o fonts -u latin latin-ext cyrillic cyrillic-ext greek greek-ext -n roboto-400 -p "/fonts/" -m Roboto -b 400 -s normal -i swap -l Roboto Roboto-Regular
```
You will get the following font files:
```
+ fonts/roboto-400.cyrillic.woff2 - 6.42 KB
+ fonts/roboto-400.greek.woff2 - 7.25 KB
+ fonts/roboto-400.greek-ext.woff2 - 4.09 KB
+ fonts/roboto-400.latin.woff2 - 12.51 KB
+ fonts/roboto-400.latin-ext.woff2 - 28.52 KB
+ fonts/roboto-400.cyrillic-ext.woff2 - 18.27 KB
+ fonts/roboto-400.css
```
Here you can see a css-file with your @font-face rules:
```css
/* latin */
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 400;
font-display: swap;
src:
local('Roboto'),
local('Roboto-Regular'),
url('/fonts/roboto-400.latin.woff2') format('woff2');
unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
...
```
Why `unicode-range`?
--------------------
The purpose of this descriptor is to allow the font resources to be segmented so that a browser only needs to download the font resource needed for the text content of a particular page. For example, a site with many localizations could provide separate font resources for English, Greek and Japanese. For users viewing the English version of a page, the font resources for Greek and Japanese fonts wouldn't need to be downloaded, **saving bandwidth**.
Google Fonts
------------
You can download source fonts from https://github.com/google/fonts
After that just process files (e.g. ttf) using **Font-Ranger**
Tips
----
The browser must parse all the HTML and CSS to know what font variants are being used. Only after that any font files will be requested. If we want to kick things off more quickly, we should use preloading:
```html
```
CLI options
-----------
```
Available subsets:
latin, latin-ext, cyrillic, cyrillic-ext, greek, greek-ext, vietnamese,
sinhala, hebrew, oriya, malayalam, gurmukhi, kannada, arabic, tamil,
khmer, telugu, bengali, thai, devanagari, myanmar, gujarati
Options:
-f, --font-file Source font (to create subsets from) [string] [required]
-u, --subsets Unicode subsets to use (e.g. latin) [array] [required]
-r, --ranges Custom unicode ranges (e.g. U+0000-00FF) [array]
-o, --output-folder Output subsets to specific folder [string]
-n, --font-name Use this font name for your subset files [string]
-k, --keep-format Keep original font format [boolean]
-w, --add-woff Create and add woff as a fallback format [boolean]
-l, --locals Use local names to check for system fonts [array]
-p, --url-prefix Prefix for your @font-face urls [string]
-m, --font-family Specify "font-family" for your css file [string]
-b, --font-weight Specify "font-weight" for your css file [string]
-s, --font-style Specify "font-style" for your css file [string]
-i, --font-display Specify "font-display" for your css file [string]
-d, --skip-css Do not generate css file [boolean]
-c, --copy-original Copy original file to the output folder [boolean]
-h, --help Show help [boolean]
-v, --version Show version number [boolean]
```
API
---
You can automate **Font-Ranger** using Node.js API
Author
------
@doasync