PSD to G3 — Format Comparison & Online Converter
Fast, instant PSD to G3 (FAX) conversion. No signup required. Just drop your .psd file and get .g3 in seconds.
Batch Settings
还在为Photoshop源文件体积过大，不方便在移动设备上分享和传输而烦恼吗？尤其是在微信群里，大文件不仅加载慢，还容易占满存储空间。别担心，将PSD文件转换为G3格式，能有效解决这些问题。G3，作为一种高效的传真图像编码标准，虽然听起来有些老旧，但它在压缩黑白图像方面表现出色，能够将PSD中的矢量图层和文字信息以极小的文件体积呈现，同时保持清晰度。这对于需要快速预览、分享设计稿，或者在带宽有限环境下传输图像来说，无疑是最佳选择。我们的在线工具，操作简单快捷，无需安装任何软件，助您轻松转换，让您的设计作品在不同平台间无缝流转。
- 微信分享设计稿
- 游戏素材压缩
- 移动端快速预览
在大陆和台湾地区，G3格式虽然不常用作最终交付，但在内部沟通和移动端快速分享黑白示意图时，因其极小的文件体积而备受青睐，尤其适用于传真或旧系统兼容。
About PSD to G3 (FAX) Conversion
PSD (introduced 1990) and G3 are both image formats, but they differ in important ways. PSD is Adobe Photoshop's native format, retaining layers, masks, and editing history. G3 is a widely used file format.
When you convert PSD to G3, the goal is to convert between formats quickly. Converting PSD to G3 maintains high quality with CocoConvert's optimised encoder settings. Understanding these technical differences helps you choose the right format for your workflow.
Your PSD file is decoded and re-encoded as G3. The conversion involves 4 steps: (1) your psd file is uploaded and validated, (2) the file is decoded (parsed into its raw data), (3) the data is re-encoded in g3 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 G3 file. For the opposite direction, CocoConvert also supports G3 to PSD conversion.
How to Convert PSD to G3 (FAX)
- 1
Upload .psd file
Select your PSD file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .g3
Set G3 as the output format. The converter uses optimal settings based on the PSD→G3 conversion profile.
- 3
Convert
The server-side engine decodes your PSD file and re-encodes it as G3. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .g3 file. Multiple output files can be downloaded together.
What Happens When You Convert PSD to G3 (FAX)
Your PSD file is decoded and re-encoded as G3.
Your PSD 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
PSD
.psd file
| Extension | .psd |
| MIME Type | image/vnd.adobe.photoshop |
| Category | Image |
G3 (FAX)
.g3 file
| Extension | .g3 |
| MIME Type | image/g3fax |
| Category | Image |
Should You Convert PSD to G3 (FAX)?
When to Convert
- ✓When you need a G3 file
Frequently Asked Questions
What is the difference between PSD and G3?
PSD is Adobe Photoshop's native format, retaining layers, masks, and editing history. G3 is a widely used file format.
Does PSD to G3 conversion affect quality?
Converting PSD to G3 maintains high quality with CocoConvert's optimised encoder settings.
Which format has better compression, PSD or G3?
PSD uses lossless compression. G3 is widely supported. The better choice depends on whether you prioritize file size or quality.
How long does PSD to G3 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 PSD or G3 better for long-term storage?
PSD is better for archival since it's lossless.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.