Which font formats are supported?

TTF, OTF, WOFF, and WOFF2. WOFF2 files are decompressed automatically before inspection.

What happens if preview text is empty?

Mapped glyphs are auto-sampled. Icon fonts without letter mappings are sampled from their mapped codepoints.

What metadata appears in the report?

Family, subfamily, designer, copyright, version, glyph count, mapped codepoints, unitsPerEm, weight, width, italic angle, style flags, and bounding box.

Does it list ligatures and OpenType features?

Yes. It extracts GSUB lookupType 4 liga ligatures and lists OpenType features.

Can I inspect variable fonts?

Yes. The report shows fvar axes (tag, min, default, max) and named instances.

Elysia Tools

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Design

Font File Inspector

Inspect TTF/OTF/WOFF/WOFF2 fonts: metadata, glyph counts, metrics, style flags, Unicode coverage heatmap, glyph SVG previews, ligatures, OpenType features and variable-font axes.

Details

What this tool helps you do

opentype.js 2.x parses TTF/OTF/WOFF directly; WOFF2 is pre-decompressed with wawoff2 (WASM woff2) since opentype.js cannot read it natively. Style flags decode OS/2.fsSelection (italic 0x1 / bold 0x20 / regular 0x200 / oblique 0x400) plus head.macStyle; ligatures come from GSUB lookupType 4 (coverage format 1/2 expanded over ligatureSets); variable fonts expose fvar.axes and fvar.instances. Icon fonts without letter mappings auto-sample their mapped codepoints for preview.

Execution

Run this tool

Fill in the form, run the tool, and review the result in one place.

Prepared example runs

Click an example to fill the form automatically. File inputs still need an upload.

2 examples

Inspect the DejaVu Sans Mono TTF sample

The 3377-glyph DejaVu Sans Mono sample reports 3,322 mapped codepoints across its Unicode blocks, six Arabic lam-alef liga ligatures, weight 400 Regular, and auto-sampled glyph previews.

<section class="ffi">DejaVu Sans Mono · Book · TTF (sfnt) · 3377 glyphs · 3322 mapped · weight 400 Regular · liga ligatures · block heatmap</section>

WOFF2 web font round-trip

A 142 KB WOFF2 file is decompressed to its 332 KB sfnt form and inspected to the very same DejaVu Sans Mono report — proving the Brotli-based WOFF2 path end to end.

<section class="ffi">WOFF2 → sfnt decompressed · DejaVu Sans Mono · 3377 glyphs · glyph preview of AaGg 0123</section>

Inputs

Set the required fields, then run the tool.

2 options

FilesUpload source files for this workflow.1

Font file (TTF / OTF / WOFF / WOFF2)fileRequired

Single file max size: 15 MBSupported types: font/ttf, font/otf, font/woff, font/woff2, application/octet-stream

ContentPaste or type the main input values.1

Glyph preview text (empty = auto-sample)textOptional

Result

Ready for a run

Run the tool to preview files, text, structured data, or streamed output here.

Samples

Font File Inspector

What this tool helps you do

Run this tool

Prepared example runs

Inputs

Result

Examples that match this tool

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Prepared example runs

Inputs

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Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Inspect a TTF with auto-sampled glyphs

2. Inspect a WOFF2 webfont with custom preview text

FAQ

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3. Preview an icon font without letter mappings