QOI Won't Open? Convert to JBG Instantly
Fast, instant QOI to JBG conversion. No signup required. Just drop your .qoi file and get .jbg in seconds.
Batch Settings
您是否正在寻找一种高效的方式，将QOI（Quite OK Image）格式的图片转换为JBG（JBIG）格式？QOI以其极致的简单和快速编码解码而受到一些开发者的青睐，尤其是在游戏开发和特定应用场景中。然而，在文档处理、传真或对文件大小有严格要求的领域，JBG格式凭借其出色的无损压缩能力，能够将黑白图像文件压缩到极致，更显优势。本工具旨在帮助您轻松实现这两种格式间的转换，让您的图像资产能在不同场景下发挥最大价值，无论是用于网页优化、文档归档还是特定设备兼容。
- 游戏素材优化
- 电子发票存档
- 旧传真机兼容
在中国大陆及周边地区，微信等社交平台在图片分享时通常会自动进行压缩和格式转换。将QOI转换为JBG格式，可以有效减小黑白图片的文件体积，便于在网络条件不佳或存储空间有限的情况下进行传输和分享，同时保持图像清晰度。
About QOI to JBG Conversion
Dealing with a QOI file that won't open on your device? You're not alone — QOI compatibility issues are one of the most common reasons people search for a file converter. QOI is a widely used file format.
The fix is simple: convert your QOI to JBG. JBG 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 QOI to JBG maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your QOI 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 JBG 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 QOI to JBG
- 1
Add your QOI file
Drag and drop your .qoi file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick JBG output
Select .jbg 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 .jbg file. For batch jobs, download all at once as a zip.
What Happens When You Convert QOI to JBG
Your QOI file is decoded and re-encoded as JBG.
Your QOI file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in JBG format
The converted file is ready for download
Format Comparison
QOI
.qoi file
| Extension | .qoi |
| MIME Type | image/qoi |
| Category | Image |
JBG
.jbg file
| Extension | .jbg |
| MIME Type | image/x-jbig |
| Category | Image |
Should You Convert QOI to JBG?
When to Convert
- ✓When you need a JBG file
Frequently Asked Questions
Why won't my QOI file open?
QOI files may not open if your device lacks the right codec or application. Converting to JBG — a more widely supported format — usually resolves this. JBG is a widely used file format.
Is it safe to convert QOI to JBG 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 QOI to JBG?
Converting QOI to JBG 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 QOI 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 QOI to JBG 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.