How To Reduce File Size In Adobe Acrobat

Acrobat User Guide
Introduction to Acrobat
1. Admission Acrobat from desktop, mobile, spider web
2. What's new in Acrobat
3. Keyboard shortcuts
4. Arrangement Requirements
Workspace
1. Workspace basics
2. Opening and viewing PDFs
  1. Opening PDFs
  2. Navigating PDF pages
  3. Viewing PDF preferences
  4. Adjusting PDF views
  5. Enable thumbnail preview of PDFs
  6. Display PDF in browser
3. Working with online storage accounts
  1. Access files from Box
  2. Access files from Dropbox
  3. Access files from OneDrive
  4. Access files from SharePoint
  5. Access files from Google Drive
4. Acrobat and macOS
5. Acrobat notifications
6. Grids, guides, and measurements in PDFs
7. Asian, Cyrillic, and right-to-left text in PDFs
Creating PDFs
1. Overview of PDF creation
2. Create PDFs with Acrobat
3. Create PDFs with PDFMaker
4. Using the Adobe PDF printer
5. Converting spider web pages to PDF
6. Creating PDFs with Acrobat Distiller
7. Adobe PDF conversion settings
8. PDF fonts
Editing PDFs
1. Edit text in PDFs
2. Edit images or objects in a PDF
3. Rotate, motility, delete, and renumber PDF pages
4. Edit scanned PDFs
5. Enhance certificate photos captured using a mobile camera
6. Optimizing PDFs
7. PDF properties and metadata
8. Links and attachments in PDFs
9. PDF layers
10. Page thumbnails and bookmarks in PDFs
11. Activeness Sorcerer (Acrobat Pro)
12. PDFs converted to web pages
13. Setting up PDFs for a presentation
14. PDF articles
15. Geospatial PDFs
16. Applying deportment and scripts to PDFs
17. Change the default font for adding text
18. Delete pages from a PDF
Scan and OCR
1. Scan documents to PDF
2. Enhance document photos
3. Troubleshoot scanner issues when scanning using Acrobat
Forms
1. PDF forms basics
2. Create a course from scratch in Acrobat
3. Create and distribute PDF forms
4. Fill in PDF forms
5. PDF form field properties
6. Fill and sign PDF forms
7. Setting action buttons in PDF forms
8. Publishing interactive PDF web forms
9. PDF form field basics
10. PDF barcode form fields
11. Collect and manage PDF form data
12. Virtually forms tracker
13. PDF forms assist
14. Send PDF forms to recipients using e-mail or an internal server
Combining files
1. Combine or merge files into unmarried PDF
2. Rotate, move, delete, and renumber PDF pages
3. Add headers, footers, and Bates numbering to PDFs
4. Crop PDF pages
5. Add watermarks to PDFs
6. Add backgrounds to PDFs
7. Working with component files in a PDF Portfolio
8. Publish and share PDF Portfolios
9. Overview of PDF Portfolios
10. Create and customize PDF Portfolios
Sharing, reviews, and commenting
1. Share and track PDFs online
2. Mark up text with edits
3. Preparing for a PDF review
4. Starting a PDF review
5. Hosting shared reviews on SharePoint or Office 365 sites
6. Participating in a PDF review
7. Add comments to PDFs
8. Adding a stamp to a PDF
9. Approval workflows
10. Managing comments | view, reply, impress
11. Importing and exporting comments
12. Tracking and managing PDF reviews
Saving and exporting PDFs
1. Saving PDFs
2. Convert PDF to Word
3. Convert PDF to JPG
4. Convert or consign PDFs to other file formats
5. File format options for PDF consign
6. Reusing PDF content
Security
1. Enhanced security setting for PDFs
2. Securing PDFs with passwords
3. Manage Digital IDs
4. Securing PDFs with certificates
5. Opening secured PDFs
6. Removing sensitive content from PDFs
7. Setting upwardly security policies for PDFs
8. Choosing a security method for PDFs
9. Security warnings when a PDF opens
10. Securing PDFs with Adobe Feel Manager
11. Protected View feature for PDFs
12. Overview of security in Acrobat and PDFs
13. JavaScripts in PDFs as a security risk
14. Attachments as security risks
15. Let or cake links in PDFs
Electronic signatures
1. Sign PDF documents
2. Capture your signature on mobile and use it everywhere
3. Transport documents for signature
4. About certificate signatures
5. Document-based signatures
6. Validating digital signatures
7. Adobe Approved Trust List
8. Manage trusted identities
Printing
1. Bones PDF printing tasks
2. Print Booklets and PDF Portfolios
3. Avant-garde PDF impress settings
4. Print to PDF
5. Printing color PDFs (Acrobat Pro)
6. Printing PDFs in custom sizes
Accessibility, tags, and reflow
1. Create and verify PDF accessibility
2. Accessibility features in PDFs
3. Reading Order tool for PDFs
4. Reading PDFs with reflow and accessibility features
5. Edit certificate structure with the Content and Tags panels
6. Creating accessible PDFs
Searching and indexing
1. Creating PDF indexes
2. Searching PDFs
Multimedia and 3D models
1. Add audio, video, and interactive objects to PDFs
2. Calculation 3D models to PDFs (Acrobat Pro)
3. Displaying 3D models in PDFs
4. Interacting with 3D models
5. Measuring 3D objects in PDFs
6. Setting 3D views in PDFs
7. Enable 3D content in PDF
8. Calculation multimedia to PDFs
9. Commenting on 3D designs in PDFs
10. Playing video, audio, and multimedia formats in PDFs
11. Add comments to videos
Impress production tools (Acrobat Pro)
1. Print production tools overview
2. Printer marks and hairlines
3. Previewing output
4. Transparency flattening
5. Color conversion and ink management
6. Trapping color
Preflight (Acrobat Pro)
1. PDF/10-, PDF/A-, and PDF/E-compliant files
2. Preflight profiles
3. Advanced preflight inspections
4. Preflight reports
5. Viewing preflight results, objects, and resources
6. Output intents in PDFs
7. Correcting trouble areas with the Preflight tool
8. Automating document analysis with droplets or preflight actions
9. Analyzing documents with the Preflight tool
10. Additional checks in the Preflight tool
11. Preflight libraries
12. Preflight variables
Color management
1. Keeping colors consistent
2. Color settings
3. Color-managing documents
4. Working with color profiles
5. Understanding colour management

Acrobat reduces the size of a PDF file without compromising quality. The Acrobat PDF compression tool balances an optimized file size against the expected quality of images, fonts, and other file content.

Save using PDF Optimizer (Acrobat Pro)

PDF Optimizer provides many settings for reducing the size of PDF files. Some of the PDF Optimizer settings are comparable to the settings that are available when you create a PDF file using Distiller. Whether you use all of these settings or only a few depends on how you intend to use the files and on the essential properties a file must accept.

In most cases, the default settings are appropriate for maximum efficiency—saving space by removing embedded fonts, compressing images, and removing items from the file that are no longer needed. Earlier y'all optimize a file, it's a good idea to audit the file's space usage. The space audit results may requite yous ideas about where best to reduce file size. Y'all can also reduce the size of your PDF past using the Reduce File Size command.

Some methods of compression may make images unusable in a print production workflow. You should experiment with diverse settings before making changes that can't be discarded.
The PDF Optimizer isn't available when Reflow is selected in the View bill of fare.

Quick video tutorial

Learn how to shrink PDF files to reduce file size using Adobe Acrobat DC on Windows or Mac.

Audit the space usage of a PDF (Acrobat Pro)

Auditing the infinite usage gives you a report of the total number of bytes used for specific certificate elements, including fonts, images, bookmarks, forms, named destinations, and comments, too every bit the total file size. The results are reported both in bytes and every bit a pct of the full file size.

Choose File > Relieve Equally Other > Optimized PDF, or Get to Tools > Optimize PDF, and then click Advanced Optimization. The PDF Optimizer dialog box opens.

Click the Audit Space Usage button at the top of the dialog box.

You tin can also audit infinite usage of a PDF in the Content pane. Choose View > Evidence/Hibernate > Navigation Panes > Content. From the Content pane options menu, choose Audit Space Usage.

Optimize a PDF (Acrobat Pro)

Open up a PDF in Acrobat DC.

Choose File > Reduce File Size or Compress PDF .

Adobe is testing the simplified optimize PDF experience with two different names - Reduce File Size or Shrink PDF. Therefore, later updating to the latest release, you come across either the Compress PDF selection or the Reduce File Size pick. From the functionality perspective, both the options are the same.

Choose the location to save the file and click Save. Acrobat DC displays a message showing the successful reduction in PDF size.

Reduce file size successful message

In Acrobat DC, go to Tools > Optimize PDF.

In the toolbar, from the Reduce File Size drop-downwardly list, click Reduce Multiple Files .

Reduce multiple files

Adobe is testing the reduce file size feel in the Optimize PDF toolbar under two unlike names - Reduce File Size or Compress PDF. Therefore, later on updating to the latest release, you see either the Compress PDF pick or the Reduce File Size option. From the functionality perspective, both the options are the same.

In the Arrange Documents dialog, click Add Files > Add together Files.

Select and add files

In the Add together Files dialog, select the files you want to add and click Open, and so click OK .

Select the version compatibility that you demand, and click OK.

Annotation: If you're certain that all your users use Acrobat DC or Adobe Acrobat Reader DC, limiting compatibility to the latest version tin further reduce file size.

In the Output Options dialog box, specify your folder and filename preferences, and click OK.

Open up the PDF Optimizer dialog box (File > Save As Other > Optimized PDF , or go to Tools > Optimize PDF, and click Advanced Optimization.).

To utilize the default settings, choose Standard from the Settings menu, and then skip to footstep vi. If you modify any settings in the PDF Optimizer dialog box, the Settings menu automatically switches to Custom.

From the Make Uniform With menu, choose Retain Existing to keep the current PDF version, or cull an Acrobat version. (The options available in panels vary depending on this selection.)

Select the check box adjacent to a panel (for example, Images, Fonts, Transparency), and then select options in that panel. To prevent all of the options in a panel from executing during optimization, deselect the check box for that panel.

(Optional) To salve your customized settings, click Relieve and proper noun the settings. (To delete a saved setting, choose information technology in the Settings bill of fare and click Delete.)

When you are finished selecting options, click OK.

In the Save Optimized Equally dialog box, click Save to overwrite the original PDF with the optimized PDF, or select a new proper noun or location.

To optimize several documents at the aforementioned time, use the Output options for the Actions Wizard.

PDF Optimizer options (Acrobat Pro)

Utilise the options from the panels in the PDF Optimizer dialog box to reduce the size of a PDF.

Images console

The Images panel of the PDF Optimizer lets you set options for color, grayscale, and monochrome image compression, and paradigm downsampling.

PDF Optimizer options in Acrobat — Change the PDF compatibility in the Images panel of the PDF Optimizer dialog box in Acrobat Pro.

Specify the post-obit options, as needed:

Downsample

Reduces file size by lowering the resolution of images, which involves merging the colors of original pixels into larger pixels.

Annotation: Masked images and images with a size less than xvi-by-16 pixels are not downsampled.

Pinch

Reduces file size by eliminating unnecessary pixel data. In full general, JPEG and JPEG 2000 compressions give better results on images similar photographs with gradual transitions from color to colour. Cipher is the ameliorate choice for illustrations with large areas of solid, apartment color, or patterns made up of apartment colors. For monochrome images, JBIG2 compression, which is bachelor in PDF Optimizer but not in Distiller, and it is superior to CCITT.

Quality

Available only for JPEG and JPEG 2000 formats. JPEG and JPEG 2000 pinch methods are typically lossy, a process that permanently removes some pixel data. You lot tin apply lossy JPEG or JPEG 2000 compression to colour images at various levels (Minimum, Low, Medium, High, Maximum). For JPEG 2000 compression, you lot can also specify lossless so that no pixel data is removed. Compression for monochrome images is lossless, except for JBIG2 pinch, which provides both Lossy and Lossless modes of compression.

Tile Size

Bachelor only for JPEG 2000 format. Divides the image being compressed into tiles of the given size. (If the epitome top or width is not an even multiple of the tile size, fractional tiles are used on the edges.) Prototype data for each tile is individually compressed and can be individually decompressed. The default value of 256 is recommended.

Optimize Images Just If There Is A Reduction In Size

When selected, if the paradigm setting will cause an increment in file size, the optimization for that image is skipped.

Fonts panel

To ensure an exact friction match to the source document, it'due south a good thought to embed all fonts used in the document. If you don't need an exact match and yous adopt a smaller file, y'all can cull not to embed fonts for roman text and E Asian text (Traditional Chinese, Simplified Chinese, Korean, and Japanese). Text in these languages is replaced with a substitution font when viewed on a system that does not accept the original fonts. The Fonts panel of the PDF Optimizer contains two lists for fonts: fonts that are available for unembedding, and fonts to unembed. Sure fonts aren't available for unembedding and don't appear in the Fonts panel. To unembed fonts in a certificate, select ane or more than fonts in the Embedded Fonts list, and click the Unembed button. If you lot don't desire to embed subsets of the embedded fonts, deselect Subset All Embedded Fonts . To prevent unembedding for all fonts in the document, select Do Not Unembed Any Font.

Transparency panel

If your PDF includes artwork that contains transparency, you can use presets in the Transparency panel of PDF Optimizer to flatten transparency and reduce file size. (Flattening incorporates transparency into corresponding artwork by sectioning it into vector-based areas and rasterized areas.) PDF Optimizer applies transparency options to all pages in the document earlier applying other optimization options.

If you select the Acrobat four.0 And Later compatibility setting, the Transparency panel is enabled and all transparency in the file is flattened during optimization. This ensures compatibility with Acrobat 4.0 and before, which doesn't back up transparency.

When you create flattening presets, they appear with the default presets in the Transparency panel.

Transparency flattening cannot be undone after the file is saved.

Discard Objects panel

The Discard Objects panel lets you specify objects to remove from the PDF and lets you optimize curved lines in CAD drawings. You can discard objects created in Acrobat and in other applications. Selecting an object removes all occurrences of that object within the PDF.

In the Discard Objects expanse, you can select from these and other options:

Discard All Class Submission, Import And Reset Actions

Disables all actions related to submitting or importing class information, and resets course fields. This option retains form objects to which actions are linked.

Flatten Form Fields

Makes grade fields unusable with no change to their appearance. Form data is merged with the page to get page content.

Discard All JavaScript Deportment

Removes any actions in the PDF that use JavaScript.

Discard All Alternate Images

Removes all versions of an paradigm except the one destined for on-screen viewing. Some PDFs include multiple versions of the aforementioned image for dissimilar purposes, such as low-resolution on-screen viewing and high-resolution printing.

Discard Embedded Folio Thumbnails

Removes embedded page thumbnails. This is useful for large documents, which can have a long time to draw page thumbnails subsequently you click the Folio Thumbnails button.

Discard Document Tags

Removes tags from the document, which also removes the accessibility and reflow capabilities for the text.

Convert Smooth Lines To Curves

Reduces the number of command points used to build curves in CAD drawings, which result in smaller PDF files and faster on-screen rendering.

Find And Merge Image Fragments

Looks for images or masks that are fragmented into thin slices and tries to merge the slices into a single epitome or mask.

Discard Embedded Print Settings

Removes embedded print settings, such as page scaling and duplex fashion, from the document.

Discard Embedded Search Index

Removes embedded search indexes, which reduces the file size.

Discard Bookmarks

Removes all bookmarks from the document.

Discard User Information panel

Use the Discard User Information panel to remove any personal information that you lot don't desire to distribute or share with others. If you lot're unable to find personal information, it may be hidden. You can locate subconscious text and user-related information by using the Examine Document command (Tools >Redact > Sanitize Certificate, then cull to Remove Hidden Information).

Discard All Comments, Forms And Multimedia

Removes all comments, forms, form fields, and multimedia from the PDF.

Discard Document Information And Metadata

Removes information in the document information lexicon and all metadata streams. (Utilise the Relieve Every bit command to restore metadata streams to a copy of the PDF.)

Discard All Object Information

Removes all objects from the PDF.

Discard File Attachments

Removes all file attachments, including attachments added to the PDF as comments. (PDF Optimizer doesn't optimize fastened files.)

Discard External Cross References

Removes links to other documents. Links that jump to other locations within the PDF are non removed.

Discard Private Data Of Other Applications

Strips data from a PDF document that is useful only to the application that created the document. This does not impact the functionality of the PDF, but it does decrease the file size.

Discard Hidden Layer Content And Flatten Visible Layers

Decreases file size. The optimized document looks like the original PDF but doesn't comprise whatsoever layer information.

Clean Up console

The options in the Clean Upwardly panel of the PDF Optimizer dialog box allow you to remove useless items from the document. These items include elements that are obsolete or unnecessary for your intended use of the document. Removing certain elements tin seriously affect the functionality of the PDF. By default, merely elements that exercise not affect functionality are selected. If you are unsure of the implications of removing other options, use the default selections.

Object Compression Options

Specifies how to apply Flate compression in the file.

Utilize Flate To Encode Streams That Are Not Encoded

Applies Flate compression to all streams that aren't encoded.

In Streams That Use LZW Encoding, Use Flate Instead

Applies Flate pinch to all content streams and images that apply LZW encoding.

Discard Invalid Bookmarks

Removes bookmarks that indicate to pages in the certificate that have been deleted.

Discard Invalid Links

Removes links that spring to invalid destinations.

Discard Unreferenced Named Destinations

Removes named destinations that are non existence referenced internally from within the PDF document. Considering this pick does not check for links from other PDF files or websites, it does not fit in some workflows.

Optimize Folio Content

Converts all end-of-line characters to space characters, which improves Flate compression.

Optimize The PDF For Fast Spider web View

Restructures a PDF certificate for page-at-a-time downloading (byte-serving) from web servers.

Enable Fast Spider web View in a PDF

Fast Spider web View restructures a PDF document for page-at-a-time downloading (byte-serving) from web servers. With Fast Spider web View, the web server sends only the requested page, rather than the unabridged PDF. This option is especially important with large documents that can accept a long time to download from a server.

Cheque with your webmaster to make certain that the web server software you utilise supports folio-at-a-time downloading. To ensure that the PDF documents on your website appear in older browsers, you can also create HTML links (versus ASP scripts or the POST method) to the PDF documents and utilize relatively brusque path names (256 characters or fewer).

Verify that an existing PDF is enabled for Fast Spider web View

Open the PDF in Acrobat, and choose File > Backdrop. Expect in the lower-correct area of the Description panel of the dialog box for the Fast Spider web View setting (Yes or No).

Verify the Fast Web View Preferences setting

Follow this procedure to brand certain that you have Acrobat set upwardly to enable Fast Web View during the PDF creation process.

In the Preferences dialog box under Categories, select Documents.

On the correct side of the dialog box, under Save Settings, make sure that Save Every bit Optimizes For Fast Web View is selected, and click OK.

Enable Fast Web View for an existing PDF

Use this procedure after you have verified your Fast Web View Preferences setting and checked the PDF properties to be sure that the file is non already enabled for Fast Web View.

Choose File > Salvage Equally . Select the same filename and location.

When a message appears asking if you desire to overwrite the existing file, click OK.

InAcrobat Pro, you can also chop-chop enableFast Spider web View in entire folders ofAdobe PDF files past using the Gear up for Web Publishing activeness. See Run an action.