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.thm

THM file: what it is and how to open it

A .thm file is a thumbnail your camera saves next to each video (Canon, GoPro, Sony and others) so its playback menu can show a preview.

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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 THM 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.

Most THM files are ordinary JPEG images of 160×120 to 640×480 pixels: rename one to .jpg and Windows Photos opens it. It is only a preview; the footage stays in the video file.

How to open a .THM file on Windows

  1. Rename it to .jpg (free). In File Explorer, change the extension from .thm to .jpg and double-click. Works for most cameras, because the file already is a JPEG.
  2. Rename a whole folder (free). Copy the folder first, then run ren *.thm *.jpg in Command Prompt inside the copy. The camera pairs previews by name, so keep the originals.
  3. Contenta Converter, for many folders. Drop the DCIM folder, pick JPG or PNG, and every .thm is converted in one pass, resized or renamed if you like. The originals stay untouched.

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.
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포맷

THM

설명 기본적으로 JPEG 파일 포맷 (JFIF)에 동일한 THM 파일 형식입니다.
장점 빠른 미리보기에 대한 축소판 이미지를 저장하는 데 사용
단점 Low resolution (previews only, not the original footage). Most image viewers and social platforms reject the .thm extension without conversion. Nothing in the preview was editable — the real media sits in the paired video file.

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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.
JK Imaging, Ltd.EASTMAN KODAK COMPANYCanon
NikonSONYSAMSUNG
GENERAL IMAGING CO.RICOH IMAGING COMPANY, LTD.RICOH IMAGING
KodakGEOLYMPUS
PanasonicFUJIFILMKONICA MINOLTA
CASIOYiTechnologySONY ERICSSON
NORITSU KOKINokiaOLYMPUS IMAGING CORP.
--Pentaconhp
AgfaPhotoXIAOYIGoPro
Zoran CorporationNIKON CORPORATIONKonica Minolta Camera, Inc.
TOSHIBADigital Camera

THM image organization

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

THM image color processing

흑백으로 변환하는 방법은 THM에서? THM를 세피아로 변환하는 방법? How to adjust the brightness THM? How to adjust the contrast THM? How to adjust the gamma THM? How to invert the colors of THM? How to boost colors from THM? How to boost the contrast from THM?

THM image processing

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

THM image annotation

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

Frequently Asked Questions about THM

Can I just rename a .thm file to .jpg?

Yes, for most cameras. THM files from Canon, GoPro, Sony and many other brands are JPEG images with a different extension, so renaming them to .jpg is enough. If a renamed file will not open, that camera stored its preview in another format.

Is a THM file the video itself?

No. It is only a small preview picture. The footage is in the video file with the same name, for example MVI_0001.MOV next to MVI_0001.THM. Deleting the THM does not delete the video.

How do I convert hundreds of THM files to JPG?

Drop the folder into Contenta Converter, choose JPG and click Start Converting. Every .thm becomes a .jpg in one batch, and you can resize or rename them in the same pass.

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

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