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Written by Tasfia Chowdhury Supty
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If you’ve ever explored the contents of a GoPro SD card, you may have come across a strange file extension: .THM. These small files often sit next to your video footage, and if you’ve wondered whether you can delete them or what they’re for, you’re not alone.
In this comprehensive guide, we’ll explain everything you need to know about a GoPro THM file—including its purpose, types, how it works, and whether you need to keep it.
A GoPro THM file is a thumbnail image file automatically generated by GoPro cameras alongside your video recordings. The file has a .thm extension and serves as a quick visual reference or preview for your video clips.
.thm
THM files are primarily used for:
These files are automatically created whenever you record a video. They allow you to visually scan through your clips without needing to open each video.
GoPro generates different file types during a recording session. Here’s a breakdown:
.mp4
.lrv
.gpmf
.tmp
Although .THM files are not meant for direct use, they are actually JPEG images. You can open a GoPro THM file with any photo viewer or editing program:
Tip: You may need to rename the file extension from .thm to .jpg to open it easily.
.jpg
Yes, you can delete THM files without affecting your main video recordings. However, doing so will:
Best Practice: If storage space is not a major concern, it’s best to keep THM files during your editing process.
Even though THM files are small, they can be useful in creative workflows:
A GoPro THM file is used as a thumbnail or preview image for videos. It helps users quickly recognize footage on the camera or GoPro software.
Yes, deleting THM files is safe and won’t impact your actual videos. However, it may remove preview functionality.
Yes. Most THM files are actually JPEGs in disguise. Simply rename the extension to .jpg and open it in any image viewer.
THM files are supplementary files. If you’re not seeing your video, make sure to also copy .mp4 or .lrv files from your SD card.
GoPro THM files are generally created for videos, not still photos. Photos are saved in standard formats like JPG and don’t require separate thumbnails.
Understanding the role of the GoPro THM file can make organizing and editing your footage much smoother. While these small thumbnail files may seem unimportant, they play a big role in speeding up your workflow, especially when navigating through large volumes of video content. Whether you choose to keep or delete them, now you know exactly what they do and how they work.
This page was last edited on 5 May 2025, at 3:13 pm
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