OTF Won't Open? Convert to TTF Instantly
Fast, instant OTF to TTF conversion. No signup required. Just drop your .otf file and get .ttf in seconds.
Batch Settings
Some metadata may not survive
Your OTF file may contain GPOS/GSUB metadata. TTF has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
フォントを選ぶとき、見た目だけでなく「動作するかどうか」が気になる場面は少なくありません。OTFは高品質な字形データを持つ一方、古いソフトウェアや特定の印刷環境では思うように扱えないことがあります。TTFに変換することで、長年使い慣れたアプリケーションでもフォントが正しく認識され、レイアウトの崩れを防げます。同人誌の入稿、社内文書の統一、Webコンテンツの制作など、用途はさまざまです。難しい操作は必要ありません。ファイルをアップロードするだけで、すぐに変換済みのTTFをダウンロードできます。
- 同人誌・コミックの入稿データ作成
- 縦書き社内文書・稟議書のフォント統一
- 古いDTPソフトへの和文フォント対応
日本語フォントはグリフ数が非常に多いため、OTFからTTFへの変換時にファイルサイズが大きくなる場合があります。縦書き用の字形（縦組み約物など）が正しく引き継がれているか、変換後に確認することをおすすめします。
About OTF to TTF Conversion
Dealing with a OTF file that won't open on your device? You're not alone — OTF compatibility issues are one of the most common reasons people search for a file converter. OTF (OpenType Font) extends TrueType with advanced typographic features.
The fix is simple: convert your OTF to TTF. TTF (TrueType Font) is the classic font format supported everywhere. This conversion lets you convert between formats quickly, solving the problem in seconds rather than hours of troubleshooting.
Full Name: OTF uses OpenType Font, while TTF uses TrueType Font. Compression: OTF uses None (uncompressed), while TTF uses None (uncompressed). Typical File Size: OTF uses 50–1 MB, while TTF uses 50–500 KB. Converting OTF to TTF maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your OTF file on secure servers in Germany — upload, convert, download. Your files are encrypted via TLS and automatically deleted within 24 hours. No account needed, no software to install, and it works on any device with a browser.
This conversion is ideal when you You need a file that works in web browsers, or when you You need maximum device and software compatibility. Common misconception: ""TTF will be smaller than my OTF file"" — in reality, ttf uses no compression, so the output file is often larger than a lossy otf. if you need a small file, ttf may not be the right choice.
The conversion engine behind CocoConvert uses FFmpeg, Sharp, and qpdf — the same open-source libraries trusted by Netflix, YouTube, and enterprise platforms. Pro users can batch convert up to 100 files at once.
How to Convert OTF to TTF
- 1
Add your OTF file
Drag and drop your .otf file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick TTF output
Select .ttf as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The font engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .ttf file. For batch jobs, download all at once as a zip.
What Happens When You Convert OTF to TTF
Your OTF file is decoded and re-encoded as TTF.
Your OTF file is uploaded and the format is validated
The file content is decoded into its raw representation
The data is re-encoded in TTF format with optimal settings
The converted file is ready for download
OTF vs TTF — Detailed Comparison
| Feature | .OTF | .TTF |
|---|---|---|
| Full Name | OpenType Font | TrueType Font |
| Compression | None (uncompressed) | None (uncompressed) |
| Typical File Size | 50–1 MB | 50–500 KB |
| Platform Support | Universal | Universal |
| Browser Support | Universal | Universal |
| Year Created | 1996 | 1991 |
| Open Standard | Yes | Yes |
Should You Convert OTF to TTF?
When to Convert
- ✓You need a file that works in web browsers
- ✓You need maximum device and software compatibility
Common Mistakes When Converting OTF to TTF
"TTF will be smaller than my OTF file"
TTF uses no compression, so the output file is often larger than a lossy OTF. If you need a small file, TTF may not be the right choice.
Frequently Asked Questions
Why won't my OTF file open?
OTF files may not open if your device lacks the right codec or application. Converting to TTF — a more widely supported format — usually resolves this. TTF (TrueType Font) is the classic font format supported everywhere.
Is it safe to convert OTF to TTF online?
Yes. CocoConvert encrypts your file via TLS, processes it on isolated servers in Germany, and permanently deletes it within 24 hours. Your files are never shared or analysed.
Will I lose quality converting OTF to TTF?
Converting OTF to TTF maintains high quality with CocoConvert's optimised encoder settings. CocoConvert uses high-quality encoder defaults to preserve as much fidelity as possible.
How large can my OTF file be?
Free users can convert files up to 250 MB each. Pro users get a 5 GB limit per file, and Business API users have custom limits.
Can I convert OTF to TTF on my phone?
Absolutely. CocoConvert works in any modern browser — iOS Safari, Android Chrome, and all desktop browsers. No app required.
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