PDFサイズ統一
異なる用紙サイズ（A3、A4、B5等）が混在するPDFを、アスペクト比を維持してA4などの均一サイズに自動縮小・拡大・配置します。
サイズ変更するPDFドキュメントをアップロード
このツールについて
The Multi-Format PDF Resizer is the ultimate standardizer for cluttered, mismatched corporate documents.
Combining invoices, contracts, and supplementary charts often results in a PDF containing massive A3 ledger pages, standard A4 agreements, and Letter-sized envelopes. Flipping through them is highly distracting, and sending them to physical office printers often causes jam errors due to size mismatch.
This tool rewrites the low-level /MediaBox and /CropBox grids on each page. It maps existing widths and heights, scales original pages proportionally to match target presets (e.g. standard A4), and introduces elegant, consistent surrounding margins, making the entire file look incredibly polished.
Practical guidance before you use PDFサイズ統一
Best for real document workflows
Use PDFサイズ統一 when you need a quick browser-based result without creating an account or sending routine documents through an unnecessary upload workflow. Corporate RFP Proposals is a common example: Standardize scanned qualification certificates and A4 bidding sheets before physical printing.
Privacy and file handling
EasyPDFNex prioritizes local processing in your browser. That means supported PDF operations run on your device, not in a public cloud queue. For sensitive files, review the output before sharing it, close the browser tab after downloading, and avoid processing documents you are not authorized to edit.
Quality checks after processing
After you align and download, open the result and check page order, text readability, signatures, links, and form fields. If the source file is scanned, encrypted, very large, or damaged, try a related workflow such as merge pdf, crop pdf, booklet folding simulator before repeating the task.
Start with a clean source file whenever possible. For PDFサイズ統一, the first step is usually "Provide mixed-size PDF": Upload a merged PDF document containing mismatched, messy page sizes. This simple preparation step prevents most failed exports, missing pages, and formatting surprises.
Editorial review note
This guidance is maintained by the EasyPDFNex editorial team and reviewed for practical PDF workflow accuracy. Tool pages are written to explain when a feature is useful, what to check before download, and where browser-based processing has limits.
使用方法
Provide mixed-size PDF
Upload a merged PDF document containing mismatched, messy page sizes.
Choose target preset
Select the target uniform size (e.g. A4, Letter, A3) and toggle scale modes.
Align and download
Click execute to trigger 3D sheet alignment, downloading a beautifully standardized PDF.
使用例
Corporate RFP Proposals
Standardize scanned qualification certificates and A4 bidding sheets before physical printing.
Financial Chart Integration
Scale broad A3 financial cash flows into neat A4 pages, preserving printing standards.
Book Margin Standardization
Force slightly varied scanned book pages into an absolutely uniform dimension for comfortable reading.
よくある質問
Will this warp my content?
Never. We support both "Contain" (proportional scaling with white bars) and "Cover" (centered crop). The default Contain mode preserves aspect ratios, preventing distortion.
Will existing forms and annotations remain clickable?
Yes. The algorithm maps the scaling factors to the Annotation coordinate arrays, scaling link boxes, sign boundaries, and inputs to align perfectly after resizing.
Is there a limit on how many pages I can resize?
No. Since all operations run locally in your client sandbox using native JavaScript, you can process extensive PDFs containing hundreds of pages in seconds.