Skip to main content

.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.

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 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.

Before you convert THM files

  1. What changes in the conversion
    Nothing worth keeping is lost, because a THM holds only a small preview: most are between 160×120 and 640×480 pixels. Converting it to JPG or PNG gives you that preview at its stored size. The footage, and any full-size frame you want, is in the video file next to it; no converter can turn a THM back into the video.
  2. What Contenta Converter does with THM
    Contenta Converter converts folders of .thm files to JPG or PNG in one batch, resizes and renames them in the same pass, and leaves the originals in place so the camera still finds its previews. A THM that is not a JPEG inside (a few older cameras store other data) is reported as failed rather than written as a broken image.

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

Format

THM

Description Формат THM по сути идентичен формату JPEG (JFIF).
Benefits Используется для хранения миниатюр для быстрого просмотра
Drawbacks 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.

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

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

Отзывы:

"Когда мне нужно было конвертировать мои фотографии, ваша программа оказалась как нельзя кстати. Спасибо!"
Джейсон Хоффман, Калифорния

"Я фотографирую в RAW каждый день, и мне очень нравится ваш конвертер. Он очень экономит время."
Джим Ричардсон, Индианаполис

"Должен сказать, я изучал различные конвертеры для фото, и ваш конвертер — понятный, простой и невероятно эффективный."
Брендон Киган, Нью-Йорк

Качество гарантируется:

Профессиональная конвертация фото и их обработка.
Используется фотографами (любителями и профессионалами), дизайн-студиями, архитекторами, и огромными организациями (NASA, IBM, Chrysler, а также различными университетами).
Абсолютно без риска. После приобретения у вас будет возможность возврата денег в 30-дневный срок. Без вопросов.
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 организация изображений

Как открыть THM? Как обработать THM? Как сжать THM? Как уменьшить размер THM? Как переименовать автоматически THM? Как организовать THM в суб-папок? Как пересжать THM? Как создать PDF фотоальбом из THM?

THM обработка цвета изображений

Как конвертировать из THM на черное и белое? Как конвертировать из THM на сепия? 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 обработка изображений

Как добавить водяные знаки на THM? How to create animated GIF slideshows from THM? How to create pencil/ink drawings from THM? Как четко THM? 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 примечание к изображению

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.

Can I get a full-resolution picture from a THM file?

No. The THM is a small preview and has no more pixels than it shows. For a full-size still, open the matching video file in a video player or editor and export a frame from it.

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

See all 100+ formats and features →