WOFF File Format

Web Open Font Format category

WOFF は Web フォントの初期標準です。フォントを圧縮して配信でき、古いブラウザでも読めます。

Typical use: 古い環境向けには WOFF、最新環境には WOFF2 を用意します。

About the WOFF format

WOFF は Web フォントの初期標準です。フォントを圧縮して配信でき、WOFF2 非対応の古いブラウザを支える役割を持ちます。

現在は WOFF2 が主流ですが、対応範囲を広げたい場合は両方を用意するのが実務的です。

Strengths

✓ WOFF2 非対応環境をカバー
✓ フォントを圧縮して配信できる

Limitations

✗ WOFF2 より大きい
✗ デスクトップには使えない

Web readiness: Native @font-face
Quality: Same outlines as source
Compatibility: IE9+ and all modern browsers
Best for: Legacy-browser web fonts

Convert WOFF to…

3 direct directions plus 3 workflows, sorted A–Z; 🔥 marks popular targets.

WOFF を OTF に変換 WOFF を TTF に変換 Hot WOFF を WOFF2 に変換 Hot

Cross-engine workflows

WOFF を BZ2 に変換 WOFF を GZ に変換 WOFF を XZ に変換

Convert other files to WOFF…

EOT を WOFF に変換 OTC を WOFF に変換 OTF を WOFF に変換 TTC を WOFF に変換 TTF を WOFF に変換 Hot WOFF2 を WOFF に変換 Hot

Frequently asked questions

What is a WOFF file?

WOFF is the older web font format (version 1) — larger than WOFF2 but still required by some legacy browser support matrices and old @font-face stacks.

How do I convert WOFF files online?

Pick a target format from the "Convert WOFF to…" list below, drop your file and hit convert. Everything runs in your browser — no install, no upload, no watermark, no limits.

Is it safe to convert WOFF files here?

Yes. Every conversion is performed by your own device inside the browser — files never leave for a server, and the page keeps working even offline.

Which formats can WOFF convert to?

This page lists all 6 directions across documents, images, audio, video, spreadsheets and archives — each one is its own free converter page.