Font File Converter
Detect font file format and read metadata from TTF, OTF, WOFF, and WOFF2 files using opentype.js. Free, private, and in-browser.
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What is Font File Converter?
Font File Converter reads TTF, OTF, WOFF, and WOFF2 font files entirely in your browser via opentype.js and shows the format, font family, subfamily, full name, units per em, glyph count, and file size - helping you identify and compare fonts without installing them.
Key Benefits
- Identify unknown font files by their embedded metadata
- Check format compatibility before using in CSS or design tools
- Verify glyph counts and units per em for technical font work
- No installation needed - parsing runs entirely in your browser
- Private by design - font files never leave your device
Common Use Cases
- •Identifying unknown font files received from clients or downloaded
- •Checking font format compatibility before CSS @font-face setup
- •Comparing glyph coverage across multiple font files
- •Inspecting font metadata for licensing and version tracking
How to Inspect a Font File
- Choose a font file: Select a TTF, OTF, WOFF, or WOFF2 file - the format is detected automatically.
- Read the metadata: View the font family, subfamily, full name, units per em, and glyph count.
- Use the details: Verify format compatibility and glyph coverage before using the font in your project.
Key Features
- Format detection from magic bytes: TTF, OTF, WOFF, WOFF2
- Font family, subfamily, and full name extraction
- Units per em and glyph count from the font header
- File size display for quick comparison
- Parsed via opentype.js entirely in your browser
- Readable errors for unrecognized or corrupted files