How to Convert PSB to SUN — Quick & Free
Fast, instant PSB to SUN conversion. No signup required. Just drop your .psb file and get .sun in seconds.
Batch Settings
Photoshopの大型ドキュメント形式であるPSBファイルは、高精細な画像や膨大なレイヤーを含むデザイン作業に欠かせません。しかし、ウェブコンテンツや特定のグラフィックアプリケーションでの利用、あるいはより軽量なフォーマットでの共有を考えた際、SUN（Sun Raster）形式への変換が求められることがあります。SUN形式は、特にUNIX系のシステムや古いグラフィックソフトウェアとの互換性に優れ、特定のレガシーシステムや専門的なワークフローにおいて今なお重要な役割を担っています。当社の変換ツールは、PSBの持つ豊かな色彩情報やディテールを損なうことなく、効率的かつ正確にSUN形式へと変換します。複雑な設定は不要で、直感的な操作でスムーズな変換を実現。大切なデザイン資産を、必要なフォーマットで柔軟に活用できるようお手伝いいたします。
- 漫画原稿の特定システムへの取り込み
- ビジネス資料のレガシー環境での閲覧
- DTP画像の別形式での校正
日本では、縦書きテキストを含むPSBファイルをSUN形式に変換する際、文字組の保持が課題となる場合があります。変換前にフォントのアウトライン化など、適切な処理を推奨します。
About PSB to SUN Conversion
Short answer: yes, you can convert PSB to SUN online for free, and quality is well preserved with the right settings. Just upload your .psb file to CocoConvert, pick SUN as the output, and click Convert. The whole process takes seconds.
Now for the details. PSB is a widely used file format. SUN is a widely used file format. Converting between these two formats lets you convert between formats quickly.
Your PSB file is decoded and re-encoded as SUN. Converting PSB to SUN maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert runs entirely online — no software to install, no account to create. Your files are encrypted during upload (TLS), processed on isolated servers in Germany, and permanently deleted after 24 hours. It works in Chrome, Safari, Firefox, Edge, and all mobile browsers.
Need to convert more than one file? Free users can do 5 per hour. Pro gets 100 per hour with files up to 5 GB each.
How to Convert PSB to SUN
- 1
1. Upload PSB
Drop your .psb file onto the page (or tap "Browse" on mobile). Add multiple files for batch conversion.
- 2
2. Select SUN
Choose .sun from the output dropdown. Settings are pre-configured for best results.
- 3
3. Convert
One click. The server handles all the heavy lifting using FFmpeg and Sharp.
- 4
4. Download
Your .sun file is ready. Download it directly or get all files as a zip archive.
What Happens When You Convert PSB to SUN
Your PSB file is decoded and re-encoded as SUN.
Your PSB file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in SUN format
The converted file is ready for download
Format Comparison
PSB
.psb file
| Extension | .psb |
| MIME Type | image/vnd.adobe.photoshop |
| Category | Image |
SUN
.sun file
| Extension | .sun |
| MIME Type | image/x-sun-raster |
| Category | Image |
Should You Convert PSB to SUN?
When to Convert
- ✓When you need a SUN file
Frequently Asked Questions
Is PSB to SUN conversion free?
Yes. CocoConvert offers free PSB to SUN conversion with generous daily limits — 25 minutes of processing time and up to 5 files per hour (250 MB each). Pro plans remove these limits.
How fast is PSB to SUN conversion?
Most files convert in 2–10 seconds depending on size. Large image files may take 30 seconds. Batch jobs process in parallel for maximum speed.
What happens to my files after conversion?
Your uploaded PSB file and the converted SUN file are both automatically deleted from our servers within 24 hours. They are never shared, sold, or analysed.
Does converting PSB to SUN lose quality?
Converting PSB to SUN maintains high quality with CocoConvert's optimised encoder settings.
Can I convert SUN back to PSB?
Yes, CocoConvert supports SUN to PSB conversion as well. However, if the original conversion involved lossy compression, converting back won't recover the lost data.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.