JFIF to PDF

Attach a JFIF photograph as a one-page PDF for review or printing. The JPEG is decoded to pixels, so JFIF density and file structure do not set the page.

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Format Comparison & Technical Specifications

SpecificationJFIFPDF
MIME Type-application/pdf
Type-document container
Compression-Flate / JPEG / JBIG2 / CCITT
Standard Specification-ISO 32000-2:2020
Magic Bytes Header-25 50 44 46 (%PDF)

Format Overview & Applications

A legacy scan or camera export may carry JFIF density hints; this page is sized from decoded pixels, which is useful for screen review but may need layout before printing at a target size.

Technical Specifications & Codec Breakdown

The JFIF converter decodes the JPEG scan into RGBA pixels with jpeg-js, encodes those pixels as PNG, and the PDF writer embeds that PNG image.

OS & Browser Compatibility

JPEG-capable camera and photo applications read the original JFIF file; PDF readers display the converted raster page without needing to interpret its JFIF density fields.

Useful info

If physical print size matters, set the desired dimensions in your layout app first; JFIF density values do not drive the auto-sized PDF page.

Format Comparison & Technical Specifications

A 3000×2000 JFIF scan placed for an archive note makes a 20×13.3 inch page at 150 dpi.

Frequently Asked Questions

Is this embedded as the original JPEG?

JFIF is decoded to RGBA and re-encoded as PNG before it is placed in the PDF.

Will its JFIF print-density setting set the PDF page size?

The PDF uses pixel dimensions and the conversion density of 150 dpi; it does not size the page from JFIF density metadata.