PDF To JPG Converter
Rasterise the first pages of an uploaded PDF into standalone JPG or PNG images at a chosen DPI, reporting each page's pixel dimensions and file size.
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About PDF To JPG Converter
The page is handed to ImageMagick's convert, which rasterises a PDF by piping it through its ghostscript delegate at the chosen DPI. Page pixels are width in inches times DPI, so a US Letter page at 150 DPI comes out 1275 x 1650 px regardless of what the document contains.
Each requested page index is rendered as one standalone file: convert reads page i as file.pdf[i] and writes a fresh JPG or PNG. JPG quality is the encoder setting you pick; PNG is written losslessly, so its size follows from the pixels alone.
Rendering stops at the last page the delegate can actually read, so a request for four pages on a two-page document quietly returns two. The PDF header is checked first, and encrypted or corrupt files usually fail there instead of producing blank images.
Questions about PDF To JPG Converter
Why do the pixels depend on DPI?
PDF pages are vectors, so rasterising them multiplies the page size in inches by the DPI; 300 DPI gives roughly four times the pixels of 150 DPI.
Can I convert only one page?
Yes, pick a single page. Page indexes start at the first page; anything beyond the document's length stops the rendering there.
Does PNG really ignore the quality setting?
PNG is lossless, so there is no encoder quality knob to honour. The setting only drives the JPG encoder.
Is the PDF kept on the server?
It is read once for this run and replaced shortly afterwards; download the images while the links are fresh.
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