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THUMB Image Conversion: Batch Convert, Resize & Organize

Contenta Converter PREMIUM lets you open, convert, and batch process THUMB files into modern formats like JPG, PNG, TIFF, PDF, and more.

Download the free trial: every file converts, keep 10 clean

Contenta Converter results screen showing 32 converted photos and a before and after preview
The results screen of Contenta Converter: 32 photos converted in 47 seconds, with a before and after preview.
  1. Add your THUMB filesDrop in single files or a whole folder.
  2. Pick output formatJPG, PNG, TIFF, PDF and more.
  3. Click ConvertEvery file converted in one pass.

The same photo, five outputs

Photo of a stage set with a bed, a small table and a checked sofaDSC_0001.NEF · 3900×2613
  • PNG.png1.9 s
    16.1 MB
  • AVIF.avif2.2 s
    2.02 MB
  • JPG.jpg1.7 s
    1.69 MB
  • WebP.webp1.7 s
    1.32 MB
  • JPEG XL.jxl1.7 s
    1.12 MB
One Nikon D60 RAW file converted to five formats, at quality 90 where the format has a quality setting. PNG is lossless, so it is the largest. Seconds are the median of three runs. Measured with the Contenta Converter 9.0.35 command line on an AMD Ryzen 9 3900X, 2026-09-30.

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.

Optimize file size, keep important metadata, and prepare images for web, print, or long-term archiving in just a few clicks.

✓ 100,000+ users worldwide · 100+ formats supported · Free trial, no time limit

포맷

THUMB

설명 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.
장점 Useful for recovering preview images from application caches and backups.
단점 Contains only low-resolution previews, not the original images. Format varies by source application.

Ready to convert your THUMB files? Download the free trial.

Download the free trial: every file converts, keep 10 clean

증명서:

"귀하의 소프트웨어를 찾을 필요가 안심하고 오늘은이 사진을 변환할 수있습니다. Thanks!"
제이슨 호프만, CA

"내가 매일 RAWs 촬영하고 난 당신 변환기를 사랑 해요. 이건 정말 시간을 절약할 수있습니다."
짐 리처드슨, 인디애나 폴리스

"내가 당신 사진을 변환하고, 간단한 청소이며, 몹시 좋은 찾아 다 녔다고합니다."
브랜든 키건, 뉴욕

만족 보장:

프로페셔널 포토 변환 및 작업이 이보다 쉬울 수가 없습니다
사진작가 (아마추어 및 프로페셔널), 디자인 스튜디오, 건축가, 큰 단체 (NASA, IBM, 크라이슬러, 대학 병원들)가 사용함.
위험부담이 전혀 없습니다. 구매 후, 30일 이내 환불이 보장됩니다. 특별히 사유를 묻지도 않습니다.
samsungNIKON CORPORATIONPanasonic
Apple

THUMB image organization

THUMB를 어떻게 열지? THUMB를 처리하는 방법을? THUMB를 축소하는 방법? THUMB를 줄이기 위해 어떻게? THUMB를 어떻게 자동으로 이름을 바꾸려면? THUMB를 어떻게 구성하는 하위 - 폴더? 을 다시는 THUMB를 어떻게? 어떻게는 THUMB에서 PDF의 사진 앨범을 만들?

THUMB image color processing

흑백으로 변환하는 방법은 THUMB에서? THUMB를 세피아로 변환하는 방법? How to adjust the brightness THUMB? How to adjust the contrast THUMB? How to adjust the gamma THUMB? How to invert the colors of THUMB? How to boost colors from THUMB? How to boost the contrast from THUMB?

THUMB image processing

THUMB를 위해 워터마크를 추가하려면 어떻게? How to create animated GIF slideshows from THUMB? How to create pencil/ink drawings from THUMB? THUMB를 선명하게하는 방법? How to blur THUMB? How to refocus THUMB? How to denoise hot pixels from THUMB? How to crop THUMB? How to rotate THUMB? How to flip THUMB?

THUMB image annotation

How to change the resolution in dpi of THUMB? How to modify the IPTC/XMP creation and modification dates of THUMB? How to modify the IPTC/XMP description of THUMB? How to modify the IPTC/XMP location of THUMB? How to modify the IPTC/XMP legal information of THUMB? How to edit the IPTC/XMP workflow (status and urgency) of THUMB? How to edit the IPTC/XMP copyright of THUMB?

Frequently Asked Questions about THUMB

What is a THUMB image file?

A THUMB file is a type of image format used in various tools and workflows. With Contenta Converter PREMIUM you can convert THUMB files to more common formats like JPG, PNG, or PDF without losing control over quality.

How do I convert THUMB images to JPG?

Install Contenta Converter PREMIUM, add your THUMB files to the input list, choose JPG as the output format, and click Convert. The software will process all selected files in a single batch.

Can I batch-process many THUMB images at once?

Yes. Contenta Converter PREMIUM is built for batch processing and can handle hundreds or thousands of THUMB images in one operation, using all available CPU cores.

When should I convert THUMB images to another format?

Convert THUMB images when you need better compatibility with web browsers, design tools, or printing services. Exporting to formats like JPG, PNG, or TIFF from Contenta Converter PREMIUM makes sharing and archiving much easier.

Need more than THUMB conversion? Browse supported cameras that produce THUMB files below, or:

See all 100+ formats and features →