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THM PDF
File conversion

Convert THM to PDF

Verified by Adam B.· reviewed by FE Editorial ·updated Aug 16, 2026
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Is it possible to convert THM to PDF?
Yes - THM converts to PDF.

Open the .thm file in IrfanView and use File > Save As > PDF, or rename it to .jpg and print to a virtual PDF printer. The result is a one-page PDF containing the thumbnail; THM images are typically around 160×120 pixels, so the PDF will look small or blurry at full page size.

Also to PDF: LTX · TEX · DWG

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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Why convert THM to PDF?

A .thm file is a standard JPEG saved by a camera or GoPro as a video-preview thumbnail. Some documentation, legal, or asset-management workflows require all media previews in a uniform .pdf format, making conversion useful when embedding a video thumbnail in a report or archive alongside other documents.

How to convert THM to PDF

IrfanView FREE

Open the .thm file via File > Open (set filter to All files); go to File > Save As and select PDF from the format list.

XnView MP FREE

Open the .thm file in XnView MP; go to File > Export and set the output format to PDF. Use Tools > Convert for batch export of multiple files.

About these formats

.THM Thumbnail Image (camera/camcorder video thumbnail)

A THM file is a small JPEG preview image that cameras, camcorders, and GoPros save automatically next to each video clip (e.g. GX010123.MP4 gets a GX010123.THM). Despite the extension, it…

Open .THM details →
.PDF Portable Document Format

A PDF (Portable Document Format) is a fixed-layout document that looks identical on every device - fonts, images, and layout are all embedded. Open it in any browser or the built-in viewer…

Open .PDF details →

Quality & what to watch

  • The source thumbnail is typically around 160×120 pixels; the PDF will not look sharp at full page size.
  • A .thm file is internally a standard JPEG - rename it to .jpg first if a tool does not recognise the .thm extension.
  • If you need a high-resolution image in PDF, extract a still frame from the companion video file instead.

Frequently asked questions

Why is my THM-to-PDF result so small or blurry?
THM thumbnails are low-resolution preview images (around 160×120 px); converting to PDF does not add pixels or increase resolution.
Do I need a plugin to open a .thm file in IrfanView?
No - IrfanView opens .thm files directly as JPEG without any additional plugin.
Can I convert multiple .thm files to PDF at once?
Yes - IrfanView and XnView MP both support batch conversion; add multiple .thm files and set PDF as the output format.