How can I make my PDF file size smaller without losing quality?

Open your PDF in Acrobat and go to File > Save as Other > Optimized PDF. In the 'Images' section, set color/grayscale images to about 150 dpi and monochrome to 300 dpi. Choose 'JPEG quality Medium/High' (around 85%) for images. In the 'Fonts' section, select 'Subset embedded fonts' and 'Unembed fonts' if not needed. Remove unnecessary objects and user data under 'Discard Objects' and 'Discard User Data'.

What is 'downsampling' in PDF optimization and why does it matter?

Downsampling means reducing the number of pixels in an image within your PDF. It matters because fewer pixels mean a smaller file size, which helps the PDF load faster. You can control how much quality you lose by choosing the right 'dots per inch' (dpi) setting.

If my PDF is a scanned document, how should I optimize it?

If your PDF is a scanned document, you should use the 'Optimize Scanned Pages' option in Acrobat. This tool is designed to work specifically with scanned content, which often has different characteristics than digitally created PDFs. It can help clean up and compress scanned images more effectively, making the file smaller and clearer.

What is the difference between RGB and CMYK colors when optimizing a PDF for screen viewing?

Color Model Best Use File Size Impact. RGB (Red, Green, Blue) For on-screen viewing (websites, emails) Generally smaller file size CMYK (Cyan, Magenta, Yellow, Black) For professional printing Generally larger file size

Why should I unembed fonts when optimizing a PDF?

You should unembed fonts to make your PDF file smaller. When fonts are embedded, the font data is stored inside the PDF. If the viewer already has those fonts on their computer, unembedding them removes this extra data, reducing the file size. However, be careful, as unembedding can sometimes change how the document looks if the viewer doesn't have the correct fonts.

Enforce organization-wide PDF optimization policies in Adobe Acrobat — How-to & AI prompts

AI prompts

3 ways to ask · copy any one

AExecute — “help me do it”Set a rule for all users to optimize PDFs by...…+

Set a rule in the Admin Console so all users must optimize PDFs using these settings: [describe settings].

when the reply comes backWould you like tips on monitoring compliance with your policy?

BImprove — “do it better”Suggest ways to make our PDF optimization policy...…+

Suggest ways to make our PDF optimization policy stricter or more effective for our organization’s needs.

when the reply comes backNeed help explaining these rules to your users?

CDecide — “help me choose”Help me choose the best PDF optimization settings...…+

Help me choose the best PDF optimization settings for our organization’s goals: [list goals or needs].

when the reply comes backWant advice on balancing file size and quality?

How to do it

the tool · the steps · what to avoid

1
Open Adobe Acrobat and configure the desired PDF optimization settings using the PDF Optimizer dialog.
2
Save the configured optimization settings as a custom profile by selecting Save or Save Settings within the optimizer dialog.
3
Locate the saved optimization profile file on your system (typically a .opt or .xml file in the Acrobat preferences or user profile directory).
4
Distribute the saved optimization profile file to all users in your organization using your preferred method (e.g., email, shared network drive, or endpoint management tool).
5
Instruct users to import the standard optimization profile into their Acrobat application via the PDF Optimizer dialog's Load or Import Settings option.
6
Optionally, use enterprise deployment tools or scripts to automatically place the optimization profile in the correct directory for all users.
Best practiceAutomating profile distribution with endpoint management tools reduces user error and ensures compliance across large organizations.

In the appWith the API

You can save and share custom optimization profiles to ensure all users apply the same PDF settings.

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

Glossary

words on this page

PDF OptimizationMaking a PDF file smaller and easier to share without losing important quality.ExampleAfter PDF Optimization, a large presentation file becomes small enough to email easily.

Admin ConsoleThe online place where admins set rules for all users.ExampleThe Admin Console is where the IT manager sets up new user accounts and manages software licenses.

Organization-wide PolicyA rule that applies to all users in a company.ExampleThe organization-wide policy requires everyone to use two-factor authentication for logging into company systems.

The real tasks

the one, listed here

Replace a large hero image with a compressed version so the page loads faster for users on slow connections.

FAQ

about this task

You can set a PDF optimization policy by logging into the Admin Console, finding the settings for Adobe Acrobat, and choosing the options that control how PDFs are saved or compressed for everyone in your organization.

PDF optimization means making sure all PDF files are smaller and easier to share or store, which helps save space, makes sharing faster, and can meet business or legal requirements.

Yes, if your Admin Console allows, you can set different rules for groups or departments, so each team has the settings that fit their work best.

Enforcing a policy means the rule is set and managed by the admin, so users do not have to remember or choose settings themselves—the system does it for them.

Enforcing these policies helps your company save storage space, makes it easier to send files, and ensures everyone follows the same rules, which can be important for security or legal reasons.

Enforce organization-wide PDF optimization policies

When to use it

AI prompts

How to do it

Glossary

The real tasks

Who does this

FAQ

Sources

Adobe help

Other guides

When it fails