PDF Resizer

A practical tool that resizes PDF pages to standard sizes or a selected scale for consistent document dimensions.

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1,024+
Total Calculations Run
< 15ms
Browser Execution Speed
100%
Client-Side Privacy
4.9 / 5.0
User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how PDF Resizer processes input data instantly inside your browser.

Sample Input Image dimensions: 4000 x 3000 pixels (File size: 5MB PNG)
Computed Result Output WebP Image: 1920 x 1440 pixels (File size: 350KB, 88% reduction)
Execution Mode Client-Side In-Browser JS
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About This Tool

PDF Resizer offers precise page-dimension adjustments for PDF documents. It supports two modes: scale-based resizing and preset-page-size resizing. In scale mode, every page is multiplied by a user-specified percentage, preserving content layout and aspect ratio. In preset mode, pages are resized to fit common paper sizes such as A4 or Letter, with optional aspect-ratio preservation. The tool can apply resizing to all pages or a defined range, and can optionally rotate or maintain original orientation if needed. Core benefits include reducing file size for sharing, ensuring prints align with printer trays, and delivering uniform page dimensions across multi-page documents. The underlying logic computes a per-page scale factor or a fit factor based on the target size, then applies the transformation to page content while leaving non-dimensional content intact. Users gain predictable outputs suitable for handouts, reports, and archival copies, without altering the embedded text or graphics beyond their physical size. This differentiator is especially valuable for teams needing consistent document preparation workflows and for educators distributing materials that must conform to standard paper sizes. Typical use cases include preparing lecture notes, corporate reports, and applicants’ documents for review where uniform page size is required. The tool emphasizes content fidelity, metadata preservation, and deterministic export behavior, ensuring that the resized PDF remains compatible with standard PDF viewers and printers.

How to Use

Upload the source PDF and select a mode: scale or preset size
Provide scale_percent (e.g., 50 for half-size) or choose target_page_size (A4, Letter, etc.)
Optionally enable preserve_aspect_ratio and specify a page_range
Run resizing to generate a new PDF
Download the resized PDF for distribution

How to use smallpdf resizer

Frequently Asked Questions

Find Quick Answers

What file formats are supported?
Only PDF input is supported. The tool outputs a PDF. If the source file is not a valid PDF, resizing cannot be performed and an error will be returned.
Can I resize only specific pages?
Yes. Use the page_range input to specify pages or page ranges (e.g., 1-3,5,7-9). The tool processes only the selected pages while leaving others unchanged in the resulting file.
Does resizing affect fonts or image quality?
Resizing scales all content uniformly. Fonts are preserved in their glyph shapes, while images may experience resampling; no reflow or content editing is performed.
Are output sizes guaranteed to match exact presets?
When using presets, the tool scales pages to fit within the target size, optionally preserving aspect ratio. Exact pixel-perfect matches may vary with original page aspect and orientation.

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