THM Converter

Convert THM images to AAI, AI, ALTO, APNG and more online. Upload, convert, and download — no software required.

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What is THM ?

THM is a small JPEG thumbnail that Canon and other cameras save next to each video, showing its first frame.

THM format  ▶

Why convert THM files?

THM is a small JPEG preview that cameras save next to each video. Computers do not show it as an image. On this site THM files are converted one way:

The picture stays thumbnail-sized; for a full frame, take a still from the video itself.

Start converting your THM files now — it's fast, easy, and supports any output format you need.

Convert THM to other formats

How to convert THM files

  1. Upload your THM file
    Drag & drop your THM file, click 'Select Files' to upload from your device, or import directly from Dropbox, Google Drive, OneDrive, or paste a URL.
  2. Choose the output format
    Pick any supported format you want to convert to.
  3. Adjust settings (optional)
    If you like, tweak output options such as resolution, quality, or compression.
  4. Convert the file
    Click the 'Convert' button. The conversion takes only a few seconds.
  5. Download your converted file
    Download the converted file to your device, or save it directly to Google Drive, Dropbox, or OneDrive.