Font Converter
Repackage TTF and OTF fonts into the WOFF web format with real per-table zlib compression — and a clear account of what cannot be done in a browser.
FontsOpen tool
Category
Font Tools
Inspect, preview, test and repackage fonts. Read every table in a TTF, OTF or WOFF — and find out plainly what a browser cannot convert.
Ten font tools that parse the real SFNT structure: the name table, glyph metrics, character coverage and embedding rights. Repackage TTF/OTF into WOFF with genuine zlib compression, preview and test fonts live, and generate typeface pairings.
Font Tools list
TTF to WOFF Converter
Turn a TrueType TTF file into a WOFF web font, cutting 30–50 percent of the size with identical rendering.
FontsOpen tool
TTF to OTF Converter Read limits
TrueType to OpenType conversion needs a font compiler. This page explains exactly why, and gives you the route that actually works.
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OTF to TTF Converter Read limits
OpenType to TrueType needs cubic-to-quadratic outline conversion. This page explains why that cannot happen in a browser and how to do it properly.
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WOFF to WOFF2 Converter Read limits
WOFF2 needs Brotli plus a glyph-stream transform, neither of which a browser exposes. Here is what to run instead.
FontsOpen tool
WOFF2 to WOFF Converter Read limits
WOFF2 is Brotli-compressed with a table transform, so a browser cannot expand it back. Here is the command that can.
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Font Metadata Checker
Read a font file's real internals: name table, version, designer, licence, glyph count, metrics, embedding rights and character coverage.
FontsOpen tool
Font Previewer
Load a font file and preview it with your own text, at any size, weight, letter spacing and line height.
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Font Tester
Test a font for the things that actually matter: measure width, ambiguous glyph pairs, accent coverage and character set size.
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Font Identifier Read limits
Identifying a font from a picture needs a fingerprint database. This page explains why, and gives you four methods that actually work.
FontsOpen tool
Font Pairing Generator
Generate heading and body typeface pairings with a reason for each, set at real sizes so you can judge them properly.
FontsOpen tool
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