JPEG to FAX — Format Comparison & Online Converter
Fast, instant JPEG to FAX conversion. No signup required. Just drop your .jpeg file and get .fax in seconds.
Batch Settings
大切な思い出の詰まった写真、ビジネスの重要な書類、あるいは心惹かれる漫画の一コマを、遠く離れた方へファクシミリで送る。そんな時、JPEG形式の画像をどうすれば良いのか、お困りではありませんか？当サイトでは、一般的な画像形式であるJPEGファイルを、ファクシミリ送信に最適な形式へとスムーズに変換するお手伝いをいたします。複雑な設定は一切不要。まるで手書きの書簡を送るような、温かみのあるコミュニケーションを、デジタルの力で実現します。特に、縦書きの文章や繊細な線画を含む画像も、ファクシミリで読みやすいよう、きめ細やかに調整する技術を導入しております。大切な情報を、確実にお届けするために、ぜひ当社の変換サービスをご利用ください。
- ビジネス文書の送付
- 漫画原稿の共有
- イベント案内の配布
日本では、ビジネスシーンにおいて未だファクシミリが重要な連絡手段として活用されており、手書きの署名や印鑑を要する書類の送付に重宝されています。
About JPEG to FAX Conversion
JPEG (introduced 1992) and FAX are both image formats, but they differ in important ways. JPEG uses lossy compression optimised for photographic content, balancing quality against file size. FAX is a widely used file format.
When you convert JPEG to FAX, the goal is to convert between formats quickly. Converting JPEG to FAX maintains high quality with CocoConvert's optimised encoder settings. Understanding these technical differences helps you choose the right format for your workflow.
Your JPEG file is decoded and re-encoded as FAX. The conversion involves 4 steps: (1) your jpeg file is uploaded and validated, (2) the file is decoded (parsed into its raw data), (3) the data is re-encoded in fax format, (4) the converted file is ready for download.
CocoConvert's converter handles the entire pipeline server-side using FFmpeg, Sharp, and qpdf — battle-tested libraries used by streaming platforms and enterprise tools. Files are encrypted in transit and deleted within 24 hours.
This conversion is ideal when you When you need a FAX file. For the opposite direction, CocoConvert also supports FAX to JPEG conversion.
How to Convert JPEG to FAX
- 1
Upload .jpeg file
Select your JPEG file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .fax
Set FAX as the output format. The converter uses optimal settings based on the JPEG→FAX conversion profile.
- 3
Convert
The server-side engine decodes your JPEG file and re-encodes it as FAX. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .fax file. Multiple output files can be downloaded together.
What Happens When You Convert JPEG to FAX
Your JPEG file is decoded and re-encoded as FAX.
Your JPEG file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in FAX format
The converted file is ready for download
Format Comparison
JPEG
.jpeg file
| Extension | .jpeg |
| MIME Type | image/jpeg |
| Category | Image |
FAX
.fax file
| Extension | .fax |
| MIME Type | image/g3fax |
| Category | Image |
Should You Convert JPEG to FAX?
When to Convert
- ✓When you need a FAX file
Frequently Asked Questions
What is the difference between JPEG and FAX?
JPEG uses lossy compression optimised for photographic content, balancing quality against file size. FAX is a widely used file format.
Does JPEG to FAX conversion affect quality?
Converting JPEG to FAX maintains high quality with CocoConvert's optimised encoder settings.
Which format has better compression, JPEG or FAX?
JPEG uses lossy compression. FAX is widely supported. The better choice depends on whether you prioritize file size or quality.
How long does JPEG to FAX conversion take?
Most conversions finish in seconds. Larger files or complex image content may take 10–30 seconds. CocoConvert processes files in parallel for batch jobs.
Is JPEG or FAX better for long-term storage?
Both formats use lossy compression, so consider keeping your original source file for long-term storage.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.