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Work faster with THUMB image files
Open, convert, and recompress THUMB images to modern formats like JPG, PNG, WEBP, and PDF. Contenta Converter PREMIUM processes entire folders at once and keeps your metadata intact when you need it.
Download free trial — convert THUMB now See all features →
$129 one-time. No subscription, no per-image fees.
- Free trial, no time limit
- Keep 10 results clean
- Windows 10/11
- Works offline
- 100,000+ users worldwide
- Download the trial and install it on Windows 10 or 11.
- Drop your THUMB files, or a whole folder, into Contenta Converter.
- Pick JPG, PNG, TIFF or PDF and click “Start Converting”.
The same photo, five outputs
DSC_0001.NEF · 3900×2613- PNG.png1.9 s16.1 MB
- AVIF.avif2.2 s2.02 MB
- JPG.jpg1.7 s1.69 MB
- WebP.webp1.7 s1.32 MB
- JPEG XL.jxl1.7 s1.12 MB
Apple Photos — Convert, Resize & Organize
格式詳情： THUMB
| 格式 | THUMB |
| 公司 | |
| 說明 | Thumbnail files (.thumb) are small preview images generated by various applications and operating systems. They contain reduced-size versions of larger images for quick browsing and preview purposes. Contenta Converter PREMIUM can batch convert thumbnail files to JPG, PNG, TIFF, and other standard formats. |
| 優點 | Useful for recovering preview images from application caches and backups. |
| 缺點 | Contains only low-resolution previews, not the original images. Format varies by source application. |
使用者證明:
“I have been using Contenta Converter for years and it has saved me countless hours of work. Highly recommended!”
“Simple, fast, and does exactly what it promises. The batch processing is incredibly efficient.”
“Best image converter I have found. The RAW support and metadata handling are top-notch.”
保證滿意:
 | 簡單又專業的照片轉換以及處理過程 |
|
| 攝影師（業余和專業），設計工作室，建築師，大機構（NASA，IBM，克萊斯勒，大學醫院）所使用的產品。 |
|
| 完全無風險. 購買後，您將獲得一個30天退款保證，絕不多問。 |
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Frequently Asked Questions
What image formats does the Apple produce?
The Apple produces THUMB files. You can convert these to JPG, TIFF, PNG, PDF, WEBP, and many other formats using Contenta Converter PREMIUM.
How do I convert Apple photos?
Download Contenta Converter PREMIUM, drag and drop your photos, choose the output format, and click Convert. It supports batch conversion of hundreds of files at once.
Does Contenta Converter support RAW files and metadata?
Yes. Contenta Converter PREMIUM reads RAW files from most popular camera brands and can preserve or update IPTC/XMP metadata such as copyright, location, and descriptions during conversion.
Can I add a watermark to my Apple photos?
You can add text or image watermarks to all your photos in one step. Contenta Converter PREMIUM lets you choose position, opacity, and size so your branding looks consistent on every export.
Is Contenta Converter free to try?
Yes. The trial has every feature and no time limit. Pick up to 10 results to keep clean; the rest carry a small watermark. Buying a license removes the watermark.