Generate Document Pages Preview Leave feedback
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GroupDocs.Comparison can render thumbnail images of selected pages — useful for review dashboards, file browsers, and any UI that needs a quick visual reference without downloading the full document.
from groupdocs.comparison import Comparer
from groupdocs.comparison.options import PreviewOptions, PreviewFormats
def create_page_stream(page_number):
# Return a writable stream — GroupDocs.Comparison writes the rendered page into it.
return open(f"./page-{page_number}.png", "wb")
def release_page_stream(page_number):
# The stream returned from create_page_stream has already been flushed and
# closed by .NET. This hook is for any per-page bookkeeping you want to do.
pass
def generate_document_pages_preview():
with Comparer("./source.docx") as comparer:
preview_options = PreviewOptions(create_page_stream, release_page_stream)
preview_options.preview_format = PreviewFormats.PNG
preview_options.page_numbers = [1, 2, 3]
comparer.source.generate_preview(preview_options)
if __name__ == "__main__":
generate_document_pages_preview()
source.docx is the document used in this example. Click here to download it.
Binary file (PNG, 163 KB)
You can choose the output format (PNG / JPEG), control resolution, and render only selected pages.
Use case: generate thumbnails for a review dashboard without downloading full documents.
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