PDF Page Size
Free Local ProcessingFree online PDF page size tool. Uniform every page of a PDF to A4, Letter, A3, Legal, or a custom size in one click — ideal for keeping page sizes consistent before printing, layout proofing, or binding. Files are processed entirely in your browser and never uploaded.
Drag files here, or
max each 200.0 MB
Options
How to Use
- 1 Select the PDF whose page size you want to adjust
- 2 Choose the target size (A4 / Letter / A3 / Legal), or pick "Custom" and enter the width and height in millimeters
- 3 Click the "Resize" button
- 4 Download the resized file
FAQ
Q: Does resizing change the content aspect ratio?
Only the page canvas is resized; existing content stays at its original position. If the original page ratio differs from the target, the blank margin area may change.
Q: Which target sizes are supported?
A4 (210×297 mm), A3 (297×420 mm), Letter (215.9×279.4 mm), Legal (215.9×355.6 mm), plus any custom size.
Q: Can I process multiple PDFs at once?
One file is processed at a time. For multiple files, please resize them one by one.
Related Tools
PDF Merge
Merge multiple PDF files into one, with reorder support
PDF Split
Split a PDF into multiple files by page range
PDF Rotate
Rotate PDF pages by 90/180/270 degrees, apply to all or specified pages
PDF Organize Pages
One-stop PDF page organizer: extract, reorder, delete, rotate, copy
Need batch processing or AI enhancement?
Try DocsAll Document OS — upload documents, AI summarize + Workflow automation.