How to Reduce PDF Size Before Converting to Word

Updated August 13, 2026: This guide now uses the converter’s current 25 MB and 200-page limits and replaces outdated scan-resolution and formatting claims.

If your PDF is larger than 25 MB, reduce a copy until it is below the upload limit, then verify that its text is still selectable before converting it to Word. Compression cannot solve every compatibility problem: this converter also has a 200-page limit, accepts one file at a time, has no OCR, rejects password-protected PDFs, and does not reliably preserve images, tables, columns, or complex layouts.

Convert an eligible PDF to DOCX

Check the Limit That Is Blocking Your PDF

PDF condition	Will compression solve it?	Next step
25 MB or less, 200 pages or fewer, selectable text, no password	Compression is not required	Upload one file and review the resulting DOCX
More than 25 MB, 200 pages or fewer	Possibly	Compress a copy below 25 MB, then run the verification checklist below
More than 200 pages	No	Compression does not change page count; if authorized, split the PDF and convert each part separately
Scanned or photographed pages with no selectable text	No	Use an appropriate OCR workflow first; the current converter has no OCR
Password prompt or editing/copying restriction	No	Obtain an authorized unprotected copy; do not use compression to bypass protection
Tables, images, forms, columns, or design-heavy pages	No	Compression may reduce image detail but does not make layout reconstruction more reliable

Read the password-protected PDF guide before changing document security. If visual structure matters, review the guide to tables and images in PDF-to-Word conversion before reducing image quality.

Before You Compress: Preserve and Inspect the Original

Keep the original unchanged. Save the compressed version with a new name so you can compare or start again.
Record the starting size and page count. Your target is below 25 MB and no more than 200 pages.
Test text selection. Select and copy a sentence from the beginning, middle, and end of the PDF. Paste each sample into a plain-text editor.
Identify what consumes space. High-resolution photos and page scans often offer more reduction potential than ordinary text, but do not assume this without inspecting the file.
Check sensitive or regulated content. Prefer an approved local workflow when an extra upload to a compression service would violate your organization’s rules.

Method 1: Export Again From the Source Document

If you still have the original Word, Excel, or PowerPoint file, create a new PDF from that source instead of regenerating an existing PDF. This gives you control before the page is fixed into PDF form.

Remove only pages or images that are genuinely unnecessary.
Compress oversized pictures in the source file, while keeping a copy with the original images.
Export to PDF again. Microsoft provides a Minimum size (publishing online) option when file size matters more than print quality.
Open the new PDF and repeat the text-selection and visual checks before uploading it.

Microsoft warns that picture compression discards detail and can change how an image looks. Apply it to a copy, choose the lowest reduction that gets the PDF below the limit, and inspect small text inside charts or screenshots carefully.

Method 2: Optimize a Copy in Adobe Acrobat

Adobe Acrobat’s PDF Optimizer includes an Audit space usage report. It shows the amount of space used by elements such as images, fonts, forms, and comments. Use that report before changing settings so the reduction targets the part of the file that is actually large.

Open a duplicate of the PDF in Acrobat.
Open Optimized PDF, then choose Audit space usage.
If images dominate the file, lower their resolution or compression quality gradually. Do not remove fonts, forms, comments, attachments, or other objects unless you know they are unnecessary.
Save to a new filename and check the size.
Verify selectable text, page count, readability, and important document features before using the new PDF.

Adobe also offers compression on the web, but that requires uploading the PDF to Adobe. Review the applicable privacy and retention terms before using any online compressor with confidential material.

Method 3: Use Ghostscript Only If You Understand the Tradeoffs

Ghostscript can rewrite a PDF with its pdfwrite device. Its current documentation warns that the PDFSETTINGS presets alter the input and may produce lower-quality output. Ghostscript says the result closest to the original is normally obtained without a preset or with /default, though that may not reduce the file enough.

For a copy that still needs a substantial reduction, a technical user may test the medium-resolution /ebook preset:

gs -sDEVICE=pdfwrite -dBATCH -dNOPAUSE -dPDFSETTINGS=/ebook -sOutputFile=compressed.pdf original.pdf

On Windows, the executable may be named gswin64c.exe instead of gs. Do not overwrite the original. Avoid the lower-resolution /screen preset when text clarity matters, and never assume that a successful command preserved searchability, fonts, links, forms, annotations, signatures, or accessibility information. Check the output manually.

Scan Resolution: Why 300 DPI Is a Better Starting Point

When creating a new scan, reducing resolution to 150–200 DPI is not a universal best practice. Adobe’s current scanned-PDF guidance recommends 300 DPI for grayscale or color documents and 600 DPI for black-and-white documents for optimal results with adaptive compression. The best setting still depends on character size, source quality, language, and the OCR system you plan to use.

OCR and compression are separate operations. OCR can add searchable text to an image-based document, while compression changes how content is stored. Adding an OCR text layer does not by itself guarantee a smaller PDF. Because this site’s converter has no OCR, an image-only PDF remains incompatible even if compression brings it below 25 MB.

Avoid Destructive Shortcuts

Do not overwrite the only copy. Lossy compression cannot restore discarded image detail.
Do not use Print to PDF as the default fix. It creates a new PDF and may change document features. If it is unavoidable, inspect every feature that matters afterward.
Do not flatten forms, signatures, comments, or layers blindly. A smaller file is not useful if it loses required information or evidence.
Do not downsample small text aggressively. Labels inside diagrams, footnotes, and scan details can become unreadable before the body text does.
Do not assume compression improves conversion accuracy. It is a way to meet the upload limit, not a layout-repair or OCR feature.

Verification Checklist Before Conversion

The compressed file is below 25 MB.
The PDF contains no more than 200 pages.
It opens without a password prompt or restricted-access error.
A sentence can be selected, copied, and pasted correctly from early, middle, and late pages.
A search for a known phrase finds the expected page.
Small text, numbers, punctuation, and chart labels remain readable when zoomed in.
Required links, forms, comments, signatures, bookmarks, and accessibility features have been checked when applicable.
The original and compressed PDFs have been retained for comparison.

After the PDF passes these checks, convert one file and compare the DOCX with the compressed PDF. A completed conversion does not prove that every character or layout detail survived. The site’s conversion quality test explains why document type matters.

Official Sources

Related PDF-to-Word Guides

Once the copy is below 25 MB, contains no more than 200 pages, and still has selectable text, use the PDF to Word converter and proofread the DOCX against the source.