TIFF Won't Open? Convert to G3 Instantly
Fast, instant TIFF to G3 (FAX) conversion. No signup required. Just drop your .tiff file and get .g3 in seconds.
Batch Settings
ビジネス文書のやり取りや、大切な作品のデジタルアーカイブにおいて、画像ファイルの形式選択は非常に重要です。特に、高画質なTIFFファイルを、ファックス送信や特定の業務用システムで扱われるG3形式へ変換する際、画質とファイルサイズ、そして互換性のバランスに頭を悩ませることは少なくありません。 このページでは、お手持ちのTIFFファイルを、日本のビジネスシーンで多用されるG3形式へとスムーズに、かつ最適な品質で変換するための方法をご紹介します。煩雑な設定は不要で、直感的な操作で作業を完了できるよう設計されています。大切な資料の品質を損なうことなく、効率的なファイル変換を実現するための手助けとなれば幸いです。
- ファックス送信用の書類準備
- 古い業務用システムの画像データ対応
- 漫画原稿の簡易プレビュー作成
日本国内では、ビジネス文書のやり取りにおいてG3形式のファックスが依然として広く利用されており、高品質なTIFFファイルをこの形式に変換するニーズが根強く存在します。特に、縦書きの文書や繊細な文字表現を含む画像の場合、変換時の視認性維持が重要視されます。
About TIFF to G3 (FAX) Conversion
Dealing with a TIFF file that won't open on your device? You're not alone — TIFF compatibility issues are one of the most common reasons people search for a file converter. TIFF is an uncompressed or losslessly compressed format favoured in print, publishing, and professional photography.
The fix is simple: convert your TIFF to G3. G3 is a widely used file format. This conversion lets you convert between formats quickly, solving the problem in seconds rather than hours of troubleshooting.
Converting TIFF to G3 maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your TIFF 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 When you need a G3 file.
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 TIFF to G3 (FAX)
- 1
Add your TIFF file
Drag and drop your .tiff file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick G3 output
Select .g3 as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The image engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .g3 file. For batch jobs, download all at once as a zip.
What Happens When You Convert TIFF to G3 (FAX)
Your TIFF file is decoded and re-encoded as G3.
Your TIFF file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in G3 format
The converted file is ready for download
Format Comparison
TIFF
.tiff file
| Extension | .tiff |
| MIME Type | image/tiff |
| Category | Image |
G3 (FAX)
.g3 file
| Extension | .g3 |
| MIME Type | image/g3fax |
| Category | Image |
Should You Convert TIFF to G3 (FAX)?
When to Convert
- ✓When you need a G3 file
Frequently Asked Questions
Why won't my TIFF file open?
TIFF files may not open if your device lacks the right codec or application. Converting to G3 — a more widely supported format — usually resolves this. G3 is a widely used file format.
Is it safe to convert TIFF to G3 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 TIFF to G3?
Converting TIFF to G3 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 TIFF 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 TIFF to G3 on my phone?
Absolutely. CocoConvert works in any modern browser — iOS Safari, Android Chrome, and all desktop browsers. No app required.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.