Web Font CSS @font-face Generator

Generate @font-face CSS declarations from uploaded font files with format fallbacks.

Tested tool guide Tested browser tools Checked August 16, 2026

What Web Font CSS @font-face Generator does and how it behaves

When a font face is available in several file formats, this generator turns the selected files into CSS @font-face declarations, including URL sources and format hints that browsers can evaluate in order. The font files are processed in the browser, not uploaded. The result is CSS, not a new font: it does not manufacture formats that were not selected, deploy the referenced files, or establish permission to embed them. A frequent mistake is treating source fallbacks as different typefaces; entries in one src list should be alternatives for the same face.

How the result is produced

Ordered source candidates

The src descriptor is an ordered set of candidates. For each entry, url() identifies a font resource and format() indicates its expected font format. A browser may skip a format it does not support and continue to a later candidate. This ordering is a file-format fallback for one face, not a CSS generic-family or alternate-family fallback.

Deployment and face matching

The generated text is not the font payload. Copy it into a stylesheet and make every URL resolve to the matching deployed font file. Relative font URLs in CSS are interpreted relative to the stylesheet location. Files for different weights or styles should be represented as separate faces with matching font-weight and font-style descriptors, not placed together as format alternatives.

Good uses

Building a self-hosted stylesheet after a designer delivers WOFF2 and WOFF versions of the same regular face, with both files intended to cover browsers that recognize different formats.
Updating an existing web font package whose filenames or available formats changed, so the old hand-written src chain can be replaced with declarations matching the current files.
Preparing font CSS for a static site, theme, or component library where the font binaries will be deployed as ordinary project assets beside the generated stylesheet.

Limits and checks

The tool generates CSS only. It cannot supply a fallback format that was not selected, repair a damaged font, or turn a file into another format merely by giving it a different extension.
Candidates within one src list are alternatives for one face. Regular, italic, bold, and variable instances are not interchangeable format fallbacks; their descriptors and files must accurately describe the face the browser should select.
Valid-looking CSS does not prove the font will load after deployment. A changed directory, a URL resolved relative to the stylesheet, a missing asset, or cross-origin access rules can prevent loading even when the declaration syntax is correct.

Common questions

Does this convert TTF or OTF files into WOFF or WOFF2?

No. This generator writes declarations for the font files supplied to it; it does not turn a TTF or OTF file into WOFF or WOFF2. To publish several source formats, provide each real file and deploy each one at the URL used in the CSS. Confirm separately that the font license permits web embedding.

Why does the generated font not appear on the page?

An @font-face rule only registers a family name; it does not apply that family to any element. Add a matching font-family declaration where the font should be used. If it still fails, check the generated family spelling, source URL resolution, actual file availability, selected weight and style, and any cross-origin restrictions reported by the browser.

References and verification

The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.