Latin-Only Font Subsetter
Strip all non-Latin glyphs from TTF and OTF font files online for free. Our latin-only font subsetter parses the OpenType binary, identifies all glyphs mapped to Latin Unicode codepoints (Basic Latin, Latin-1 Supplement, Latin Extended-A/B, and more), and rebuilds the font with only those glyphs — reducing large CJK or multi-script fonts by 80–95%. Supports batch processing with ZIP download. All processing happens in your browser. No signup required.
Upload TTF or OTF font files to strip all non-Latin glyphs — keeps Basic Latin, Latin-1 Supplement, Latin Extended-A/B, and common punctuation/currency symbols. Large CJK or multi-script fonts typically reduce by 80–95%. All processing happens locally in your browser — your fonts never leave your device.
Why Use Our Latin-Only Font Subsetter?
Instant Latin-Only Font Subsetting
Strip all non-Latin glyphs from TTF and OTF fonts directly in your browser — no server upload, no cloud processing. Our latin-only font subsetter parses the OpenType binary and rebuilds the glyf table in seconds.
Secure Latin Font Subsetter Online
Your font files never leave your device during subsetting. All OpenType binary parsing and glyph table rebuilding happens locally using pure JavaScript — no server upload, complete privacy for proprietary typefaces.
Latin Font Subsetter — No Installation
Subset fonts to Latin-only directly in your browser with zero software downloads, no plugins, and no account required. Our free latin-only font subsetter works on any modern browser on any operating system.
80–95% Size Reduction for CJK Fonts
Large CJK (Chinese, Japanese, Korean) and multi-script fonts contain 10,000–65,000 glyphs. Stripping everything except the ~500 Latin glyphs typically reduces file size by 80–95% — a critical Core Web Vitals optimization.
Common Use Cases for Latin-Only Font Subsetter
English-Only Website Font Optimization
If your website serves only English or Latin-script content, there is no reason to load a font with 20,000 CJK glyphs. Use the latin-only font subsetter to reduce a 4 MB Noto Sans to under 200 KB for dramatically faster page loads.
Core Web Vitals LCP Improvement
Large font files are a leading cause of poor Largest Contentful Paint (LCP) scores. Subsetting a multi-script font to Latin-only with our latin-only font subsetter can eliminate 3–5 MB of font payload and move LCP from "Poor" to "Good".
WordPress & CMS Theme Optimization
Many WordPress themes bundle full Google Fonts or Adobe Fonts packages that include every script. Use the latin-only font subsetter to create a self-hosted subset and replace the CDN font call with a local @font-face declaration.
E-Commerce Store Speed Optimization
Shopify and WooCommerce stores often load 2–4 font variants per typeface. Subsetting each variant to Latin-only with our latin-only font subsetter and self-hosting them eliminates the Google Fonts DNS lookup and reduces total font payload by 80%+.
Developer Font Pipeline Automation
Use the latin-only font subsetter as a pre-processing step in your build pipeline before converting to WOFF2. Subsetting first, then compressing to WOFF2, achieves the smallest possible web font file size for Latin-script delivery.
Email Template Font Embedding
HTML email clients that support embedded fonts have strict size limits. Subsetting a custom brand font to Latin-only with our latin-only font subsetter reduces the embedded font from megabytes to tens of kilobytes — within email size budgets.
Understanding Latin-Only Font Subsetting
What is Latin-Only Font Subsetting?
Font subsetting is the process of removing unused glyphs from a font file to reduce its size. A glyph is the visual representation of a character — a full-featured font like Noto Sans contains over 65,000 glyphs covering every Unicode script. For an English-only website, only the ~500 Latin glyphs are needed. Our latin-only font subsetter parses the OpenType binary, identifies all glyphs mapped to Latin Unicode codepoints (U+0000–U+024F and related ranges), and rebuilds the font with only those glyphs — reducing file size by 80–95% for large CJK or multi-script fonts.
How Our Latin-Only Font Subsetter Works
- 1Upload your TTF or OTF font: Drag and drop any TTF or OTF font file onto the drop zone. The file is read as binary in your browser — no data is sent to any server and your font never leaves your device.
- 2Browser-based OpenType parsing:The latin-only font subsetter parses the font's
cmaptable to find all glyph IDs mapped to Latin Unicode codepoints, expands composite glyph references, then rebuilds theglyfandlocatables with only the kept glyphs. Checksums are recalculated to produce a valid font binary. - 3Download the subsetted font: The output TTF is downloaded automatically. The results panel shows original size, subsetted size, reduction percentage, and the number of glyphs kept vs total. Multiple fonts download as a ZIP archive.
Latin Unicode Ranges Kept
- Basic Latin (U+0000–007F): ASCII characters — letters, digits, punctuation, control characters.
- Latin-1 Supplement (U+0080–00FF): Accented characters for Western European languages (é, ñ, ü, etc.).
- Latin Extended-A/B (U+0100–024F): Additional Latin characters for Central/Eastern European and other Latin-script languages.
- Additional ranges: IPA Extensions, Combining Diacritical Marks, Latin Extended Additional, General Punctuation, Currency Symbols, Letterlike Symbols, and Latin typographic ligatures.
Important Limitations
The latin-only font subsetter fully subsets TrueType (TTF) fonts by rebuilding the glyf and loca tables. For CFF/OTF fonts (OpenType with PostScript outlines), the tool analyses the Latin glyph count but cannot remove glyphs from the CFF table without a full CFF parser — the original file is returned with an analysis report. For maximum compression, convert the subsetted TTF to WOFF2 using our TTF to WOFF2 converter after subsetting.
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Frequently Asked Questions About Latin-Only Font Subsetter
A latin-only font subsetter removes all non-Latin glyphs from a font file, keeping only the characters needed for English and Western European languages. Our free latin-only font subsetter online works entirely in your browser — your font files are never uploaded to any server.
The size reduction depends on how many non-Latin glyphs the original font contains. Large CJK fonts (Noto Sans, Source Han Sans) with 20,000–65,000 glyphs typically reduce by 80–95%. Standard Latin fonts with 500–2,000 glyphs may see little or no reduction since they already contain mostly Latin characters.
Absolutely. Our latin-only font subsetter processes everything locally in your browser using pure JavaScript. Your font files are never uploaded to any server, never stored, and never leave your device. This is especially important for proprietary or licensed typefaces.
Yes — 100% free, forever. No signup, no account, no premium tier, no file size limits, and no ads interrupting your workflow. Just upload your fonts, subset, and download.
The latin-only font subsetter keeps Basic Latin (U+0000–007F), Latin-1 Supplement (U+0080–00FF), Latin Extended-A (U+0100–017F), Latin Extended-B (U+0180–024F), IPA Extensions, Combining Diacritical Marks, Latin Extended Additional, General Punctuation, Currency Symbols, Letterlike Symbols, and Latin typographic ligatures. This covers English, French, German, Spanish, Portuguese, Italian, Dutch, Polish, Czech, and most other Latin-script languages.
The tool analyses OTF (CFF-based OpenType) fonts and reports the Latin glyph count, but cannot remove glyphs from the CFF table without a full CFF parser. For OTF fonts, the original file is returned with an analysis report. Full glyph subsetting works for TrueType (TTF) fonts only.
Yes. The output is a valid TTF font file with correct OpenType checksums. Use it directly in a CSS @font-face declaration with format("truetype"). For best web performance, convert the subsetted TTF to WOFF2 using our TTF to WOFF2 converter after subsetting.
Yes — the latin-only font subsetter supports batch processing. Upload multiple TTF or OTF files at once and they will all be subsetted in sequence. Multiple output files are automatically packaged into a ZIP archive for download.
Font subsetting removes glyphs (characters) from the font to reduce the number of stored outlines. Font compression (e.g., WOFF2) applies data compression to the remaining font data. For maximum size reduction, subset first (remove non-Latin glyphs) then compress to WOFF2 — the two techniques are complementary.