Is Free Font Subsetter – Reduce Font File Size by Up to 90% free to use?

Yes, Free Font Subsetter – Reduce Font File Size by Up to 90% is 100% free with no hidden costs, subscriptions, or file size limits.

Are my files safe and private?

Absolutely. Your files are processed entirely in server RAM and are immediately deleted after conversion. Nothing is ever stored on disk.

Do I need to install any software?

No installation required. The tool works entirely in your web browser on any device.

What file formats are supported?

The tool supports these formats: ttf, otf, woff, woff2.

Free Font Subsetter – Reduce Font File Size by Up to 90%

Remove unused characters from your fonts to dramatically reduce file size. Choose from 21 language presets, custom Unicode ranges, or extract characters from your text.

Upload Font File

Drop your font file here or click to browse

Supports TTF, OTF, WOFF, WOFF2

Select Characters to Include (choose one or combine multiple methods)

Quick Presets

Choose common language scripts and symbol sets

Character Categories

Add specific character types

From Text

Paste text to extract unique characters

Custom Ranges

Specify exact Unicode ranges

Examples: U+0020-007F, 0041, U+0100-0150

How subsetting works:

• Combine methods: You can select multiple presets, categories, ranges, and text at once
• All characters are merged: The final font will include all unique characters from all sources
• Analyze first: Use the "Analyze Font" button to see which presets are best supported
• File size: More characters = larger file. Select only what you need for optimal performance

Developer & Verifier

Developed by

Marcus Rodriguez

Lead Developer

Verified by

Sarah Mitchell

Product Designer, Font Specialist

Why Subset Your Fonts?

Web fonts are one of the largest resources on any webpage after images. A typical professional font contains 1,000-20,000+ glyphs covering multiple languages, symbols, and special characters. If your website only uses English, you are loading thousands of characters you will never display. Font subsetting removes these unused characters, reducing file sizes by 50-90% or more.

89%

Latin-only Website

Google Font: 140KB → 15KB

97%

English Site

Full Unicode: 800KB → 25KB

96%

CJK Subset

Chinese Font: 5MB+ → 200KB

Performance Impact: Smaller fonts mean faster page loads, better Core Web Vitals (LCP, FCP), improved SEO rankings, and reduced bandwidth costs. For sites with millions of page views, subsetting can save significant hosting costs.

Subsetter Features

21 Language Presets

Font Analysis Tool

Text Character Extraction

Custom Unicode Ranges

Combine Multiple Methods

Size Reduction Stats

Web Optimization

No File Size Limits

21 Language Presets Available

Select one or more presets to include specific language scripts and symbol sets in your subsetted font.

Basic Latin

ASCII + Western European

Latin Extended

Eastern European, Vietnamese

Cyrillic

Russian, Ukrainian, Bulgarian

Greek

Modern and Ancient Greek

Arabic

Arabic script

Hebrew

Hebrew script

Chinese Simplified

Common simplified characters

Chinese Traditional

Traditional characters

Japanese

Hiragana, Katakana, Kanji

Korean

Hangul syllables and Jamo

Devanagari

Hindi, Sanskrit, Marathi

Thai

Thai script

Vietnamese

Latin with tone marks

Math Symbols

Mathematical operators

Currency Symbols

Currency signs

General Punctuation

Common punctuation

Arrows

Arrow symbols

Emoji

Common emoji characters

Numbers Only

Digits 0-9 + basic punctuation

Web Minimal

Minimal for web use

Web Safe

Safe for Western websites

How Font Subsetting Works

Upload Font

TTF, OTF, WOFF, or WOFF2

Analyze (Optional)

See font coverage

Select Characters

Presets, ranges, or text

Generate Subset

Process & optimize

Download

Get smaller font file

When to Use Font Subsetting

Single-Language Websites

Remove glyphs for languages you do not support. An English-only site does not need Cyrillic, Greek, or CJK characters.

Logo & Heading Fonts

For decorative fonts used only in logos or headings, subset to just the characters you display.

CJK Websites

Chinese, Japanese, and Korean fonts can be 5-20MB. Subset to commonly used characters for massive savings.

Performance Optimization

Improve Core Web Vitals scores (LCP, FCP) by reducing font file sizes and speeding up page loads.

Icon Fonts

If using icon fonts, keep only the icons you actually use on your website.

Self-Hosted Google Fonts

When self-hosting Google Fonts, subset them since you lose Google's automatic unicode-range optimization.

Frequently Asked Questions

What is font subsetting?

Font subsetting is the process of removing unused characters (glyphs) from a font file, keeping only the ones you need. This dramatically reduces file size while maintaining visual quality for displayed text.

Will subsetting affect how my font looks?

No. Subsetting only removes characters you do not use. All displayed text will look exactly the same. Only characters not included in your subset will show fallback fonts if needed.

How much can I reduce my font file size?

Typically 50-90% reduction. For CJK fonts (Chinese, Japanese, Korean), reductions can reach 95-99% since full CJK fonts contain 20,000-70,000+ characters.

What format will my subsetted font be in?

The output format matches your input. Upload TTF, get subsetted TTF. Upload WOFF2, get subsetted WOFF2. The format is preserved while reducing the character set.

Can I combine multiple languages in one subset?

Yes! Select multiple presets (e.g., Latin + Cyrillic + Greek) and they will be combined. You can also add custom Unicode ranges and text extraction on top.

Does subsetting affect font licensing?

Most font licenses allow subsetting for web use. However, always check your specific font license. Some licenses have restrictions on modification or embedding.

Should I subset Google Fonts?

Google Fonts auto-subsets via their API using unicode-range. However, if you're self-hosting Google Fonts, subsetting is highly recommended to reduce file sizes.

What's the best preset for English websites?

"Web Safe" or "Basic Latin" covers most English content. Add "Latin Extended" if you support European languages with accents (French, German, Spanish, etc.).

Language-Specific Subsetting Guides

Learn how to optimize fonts for specific languages with our detailed guides: