How to use this tool
- Enter your values in the labelled fields or load the worked example.
- Review the assumptions below, then run the tool.
- Review the result, then copy or download it.
Try this example
Accuracy and scope
Up to 30 images and 40 MB total; 16 megapixels per source. Thumbnails are reduced to at most 500 pixels per side. Label font supports ASCII; unsupported label characters become ?. No original file embedding.
Is my data uploaded?
This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.