Universal workbench

OpenType font to @font-face CSS

Generate a self-contained @font-face rule from OpenType font without uploading the font.

Device-onlyNo uploads. Ever.

Pipelines, branches, presets, naming, and detailed controls

Display

Text sizeDensity High contrast Monospace editor

Quick start

JSON → YAML WebP → PNG SVG → React JSX Plain text → Base64

From

Help me choose the best output Suggested: @font-face CSS

What matters most?

Recommendations use the registered target format and tested fidelity classification. They never inspect or upload your content.

01Input

Drop files or a folder hereChoose OpenType font files or a folder — batch input is welcome

Choose files Choose folder

or paste content

02Configure & run

OpenType font@font-face CSS

lossless conversion · single or batch

Conversion preflightSize, memory, engine, execution, and fidelity before you start

Input: 0 B
Estimated peak memory: 16 MiB
On-demand download: Up to 710.0 KiB on first use
Execution: Responsive local worker
Fidelity: No lossy step declared

What to provideDrop one or more OpenType font files; this format cannot be pasted as plain text.What you’ll getProduces previewable @font-face CSS text and a correctly named download.

Output naming & batch behavior

Filename templateAvailable variables: {output} (converter’s meaningful name), {name}, {target}, {ext}, {index}. Duplicate names receive a safe numeric suffix.

Exampleoutput.font.css

Pipeline 1 linear · 0 branches

Why use A → B → C?

A pipeline feeds each result directly into the next compatible converter. Use one when the destination needs an intermediate representation or when you want to inspect and normalize that middle format.

JSON → CSV → XLSX turns records into rows before building a workbook.
Markdown → HTML → DOCX resolves markup before creating a document.
SVG → PNG → PDF intentionally flattens vector artwork before placing it on a page.

Only type-compatible next steps are offered. Lossy steps are marked before you run them.

1OpenType font to @font-face CSSlossless

Add content above to start. Nothing leaves this browser.

Processing happens locally. Your file bytes are never sent anywhere.

About this conversion

How to convert OpenType font to @font-face CSS

Before you start

Drop one or more OpenType font files; this format cannot be pasted as plain text.

Accepted: .otf · font/otf

Choose or drag one or more OpenType font files onto the drop zone.
Confirm the detected format. Mixed-format batches are flagged before conversion.
Select “Convert on this device.” Produces previewable @font-face CSS text and a correctly named download.

How this converter behaves

The font is parsed into local tables and glyph data, then inspected, subset, or written into the requested web-font container without executing embedded instructions.

What happens to your data?

The conversion engine runs in this browser tab. OmniCastConverter has no upload API and never sends your content, file name, or converted result to a server.

Fidelity and limitations

This route is classified as lossless. The converter preserves meaning and structure supported by both formats.

The generated data URI can be large. Confirm the font license permits web embedding and redistribution.