Smart Maker
Smart Maker

Smart Maker

Professional Builder

All PDF Tools

PDF Page Size Converter

Convert PDF pages to A4, A3, A5, Letter, Legal or your own custom page size.

Select PDF Files

or drag and drop your PDF files here

Supports PDF files only • Maximum 20 files

Browser Processing
Fast & Free
No File Storage
01

Upload PDF

Select the PDF whose page dimensions you want to change.

02

Choose New Size

Select A4, A3, A5, Letter, Legal or enter custom dimensions.

03

Convert & Download

Resize the selected PDF pages and download the new document.

PDF Page Size Converter – Convert to A4, A3, Letter and Custom Size

Different PDFs have different page sizes – some are Letter, some are custom. For uniform printing and submission you need all pages in one size like A4. The PDF Page Size Converter by Smart Maker converts any PDF to A4, A3, A5, Letter, Legal or your own custom size with fit, fill or stretch options. Works in browser, private and free.

What can you do with this converter?

  • Convert to standard sizes – A4 210×297mm, A3 297×420mm, A5 148×210mm
  • Convert to US sizes – Letter 8.5×11 inch, Legal 8.5×14 inch
  • Custom size – enter your own width and height in mm or inch
  • Orientation – Auto, Portrait or Landscape
  • Content scaling – Fit, Fill or Stretch mode
  • Pages to convert – All pages or custom range like 1-3, 5, 8-10
  • Preserves quality – original text and images stay sharp
  • Shows converted page count and output file size

Fit modes explained

  • Fit – Show entire original page: Keeps whole content visible, adds white space if needed. Best and safe option.
  • Fill – Fill new page completely: Scales to fill full new page, may crop edges slightly. Good for no white space.
  • Stretch – Stretch to new dimensions: Forces content to exact new size, may change aspect ratio. Use only if needed.

Why convert PDF page size?

Merged PDFs have mixed sizes – some A4, some Letter, some custom screenshots. Printers need uniform A4 for perfect printing. Government forms and office submissions require A4 or Legal size only. Ebooks in custom size need to be converted to Letter for printing. Instead of recreating PDF, just convert page size with one click and keep content intact.

How to convert PDF page size

  1. Upload PDF – total pages detected automatically.
  2. Choose target size – A4, A3, A5, Letter, Legal or Custom.
  3. If Custom – enter width and height and choose mm or inch.
  4. Choose orientation – Auto keeps original, or force Portrait/Landscape.
  5. Choose scaling – Fit is recommended, Fill for no margins, Stretch for exact fit.
  6. Choose pages – All pages or enter custom range like 1-3, 5.
  7. Click Convert PDF Page Size – progress shown, download converted PDF.

Privacy and pricing

All conversion happens locally in your browser. Your PDF never leaves your device, no server storage. Free forever, no signup, no watermark, mobile friendly. Only resume and biodata need login. Original quality preserved, fast even for large files.