Highlighted

Image saved as PDF is larger than image saved as JPG

Enthusiast ,
Sep 02, 2020

Copy link to clipboard

Copied

Can anyone tell me why the same image saved as a PDF is larger in file size than that same image saved as JPG?

Does Acrobat have some extra settings or baggage that it adds?

Most Valuable Participant
Correct answer by try67 | Most Valuable Participant

There's a 1000+ page technical document that explains all of it, if you're interested...

But seriously, that's an extremely complicated issue. Suffice it to say that a PDF will contain metadata information, page information, images information, text streams information, fonts information, color space information, printing information, fields/comments/links/bookmarks information, etc., etc. While not all of that is necessarily present in your specific file, it can be, so a PDF with an image will almost always be larger than just the image itself, unless it was down-sampled while creating it, in which case it could be smaller (but the image will have a lower quality).

TOPICS
Create PDFs, General troubleshooting

Views

44

Likes

Translate

Translate

Report

Report
This conversation has been locked.

Image saved as PDF is larger than image saved as JPG

Enthusiast ,
Sep 02, 2020

Copy link to clipboard

Copied

Can anyone tell me why the same image saved as a PDF is larger in file size than that same image saved as JPG?

Does Acrobat have some extra settings or baggage that it adds?

Most Valuable Participant
Correct answer by try67 | Most Valuable Participant

There's a 1000+ page technical document that explains all of it, if you're interested...

But seriously, that's an extremely complicated issue. Suffice it to say that a PDF will contain metadata information, page information, images information, text streams information, fonts information, color space information, printing information, fields/comments/links/bookmarks information, etc., etc. While not all of that is necessarily present in your specific file, it can be, so a PDF with an image will almost always be larger than just the image itself, unless it was down-sampled while creating it, in which case it could be smaller (but the image will have a lower quality).

TOPICS
Create PDFs, General troubleshooting

Views

45

Likes

Translate

Translate

Report

Report
Sep 02, 2020 0
Adobe Community Professional ,
Sep 02, 2020

Copy link to clipboard

Copied

A PDF file contains more then the image data.

Likes

Translate

Translate

Report

Report
Sep 02, 2020 0
Enthusiast ,
Sep 02, 2020

Copy link to clipboard

Copied

That's what I suspected. Can you elaborate on that as to what other things the PDF contains or is there a web page that explains what it contains.

Likes

Translate

Translate

Report

Report
Sep 02, 2020 0
Most Valuable Participant ,
Sep 02, 2020

Copy link to clipboard

Copied

There's a 1000+ page technical document that explains all of it, if you're interested...

But seriously, that's an extremely complicated issue. Suffice it to say that a PDF will contain metadata information, page information, images information, text streams information, fonts information, color space information, printing information, fields/comments/links/bookmarks information, etc., etc. While not all of that is necessarily present in your specific file, it can be, so a PDF with an image will almost always be larger than just the image itself, unless it was down-sampled while creating it, in which case it could be smaller (but the image will have a lower quality).

Likes

Translate

Translate

Report

Report
Sep 02, 2020 0
Enthusiast ,
Sep 02, 2020

Copy link to clipboard

Copied

Thank you for your helpful explanation, try67. It is enough information for me to get an understanding of why the PDF is larger.

Likes

Translate

Translate

Report

Report
Sep 02, 2020 0