How do I reduce PDF file size in Adobe Acrobat without losing too much image quality?

Open your PDF in Adobe Acrobat. Choose 'Save as Other', then 'Reduced Size PDF'. Pick Low (High Quality) compression to keep images clear. Save your new PDF with a different name.

If my scan is blurry after reducing the PDF size, what should I do?

Check if you used high compression; this lowers image quality. Try again with Low (High Quality) compression. Always start from the original PDF, not from a compressed one.

How is Low (High Quality) compression different from High compression in Adobe Acrobat?

Compression Level Image Quality File Size Best For. Low (High Quality) Keeps images clear Smaller, but not smallest Printing, keeping quality High Images look worse, blurry when printed Smallest On-screen, email, not for print

◆ Acrobat · compress

Reduce Attachment Size

Compress the large [map and photo package] into a smaller PDF, verify image legibility at phone screen size, and email…

2ready prompts

1real task

3roles

See the prompt↓More compress workflows

AI prompts

2 ways to ask · copy any one

AExecute — “help me do it”Compress the large [map and photo package] into a smaller PDF, verify image legibility at phone…+

Compress the large [map and photo package] into a smaller PDF, verify image legibility at phone screen size, and email the compressed file to crews [anna] and [ben] so they can download in the field.

when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed.

BImprove — “do it better”Before emailing [anna] and [ben], run a compression that preserves map scale and label…+

Before emailing [anna] and [ben], run a compression that preserves map scale and label readability, create a low-bandwidth version plus a high-res archive link, and note which version to use on mobile to avoid misreading critical map details on-site.

when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed.

How to do it

the tool · the steps · what to avoid

1
Open your PDF file in Adobe Acrobat.
2
Select File in the top menu.
3
Choose Reduce File Size from the dropdown options.
Best practiceIf you do not see this option, try using Save As and then select Reduced Size PDF.
4
If prompted, select the version compatibility for the PDF and click OK.
NoteChoosing a newer version may result in a smaller file, but older PDF viewers may not open it.
5
Save the new, reduced-size PDF to your desired location.

In the appWith the API

Preview the reduced PDF to ensure image quality and content are still acceptable before attaching to your email.

This runs in the Acrobat app - there is no separate API for this task.

Glossary

words on this page

CompressionMaking a file smaller by removing some data, often from images.ExampleApplying image compression reduced the photo's file size without losing too much quality.

DPIDPI means dots per inch, and it tells you how clear an image is when it is scanned.ExampleA scanned photo saved at 300 DPI will usually contain more detail than the same photo at 72 DPI.

Original PDFThe first, uncompressed version of your PDF file.ExampleThe original PDF of the contract was sent to all parties before any signatures were added.

The real tasks

the one, listed here

Compress large map and photo packages before emailing them so recipients can download them on mobile in the field.

FAQ

about this task

Open your PDF in Adobe Acrobat.
Choose 'Save as Other', then 'Reduced Size PDF'.
Pick Low (High Quality) compression to keep images clear.
Save your new PDF with a different name.

Compression in a PDF means making the file smaller by changing how images and other data are stored. This is important because smaller files are easier to send by email, upload to websites, and open faster. However, too much compression can make images look bad, so you should match the compression to how you will use the PDF.

Check if you used high compression; this lowers image quality.
Try again with Low (High Quality) compression.
Always start from the original PDF, not from a compressed one.

Each time you compress a PDF, the images lose more quality. If you compress again, the file gets even smaller but the pictures may look very bad. Always compress from the original PDF to keep quality.

Compression Level	Image Quality	File Size	Best For
Low (High Quality)	Keeps images clear	Smaller, but not smallest	Printing, keeping quality
High	Images look worse, blurry when printed	Smallest	On-screen, email, not for print

Reduce Attachment Size

When to use it

AI prompts

How to do it

Glossary

The real tasks

Who does this

FAQ

Sources

Adobe help