How to Resize PDF Pages on Mac (Change to A4, Letter, Custom)
Scale PDF pages to A4, Letter, or a custom size on Mac in Safari or Chrome — no Acrobat, no software. Scale all content proportionally.
Mac's Preview exports PDFs but doesn't resize page dimensions — it prints to a new size but that's via the print dialog, not a proper resize. FixMyPDF's resize tool in Safari or Chrome scales pages to any standard or custom size with proportional content scaling.
Open the Resize Tool in Safari or Chrome
Go to fixmypdf.in/tools/resize in Safari, Chrome, or Firefox on your Mac. Upload your PDF from Finder. The current page dimensions are shown so you can see what size the PDF is before changing it.
Choose a Standard Size
Select A4 (297×210mm), Letter (8.5×11in), A3 (420×297mm), A5 (210×148mm), Legal (8.5×14in), or enter custom dimensions. A4 and Letter are the most common targets — choose based on your region or the recipient's expected paper size.
Proportional Scaling
All content scales proportionally to fit the new page size — text, images, and vector graphics all scale together. A thin margin is added if the aspect ratio doesn't match exactly. Text rendered at vector level remains perfectly sharp at any size; raster images may show slight quality changes when scaled significantly.
Resizing for Printing on Mac
If a PDF was designed for A3 and you want to print on A4, resize it rather than letting your printer scale it — our tool gives you more control over the scaling result. Alternatively, if a US document (Letter) needs to be printed on European A4, resize to A4 and the small dimensional difference is handled gracefully.
Custom Dimensions for Special Formats
Enter any width and height in millimetres: business card size (85×55mm), postcard (148×105mm), social media post (210×210mm for square), or any proprietary document size. This is useful for creating PDFs in custom formats that match specific printing templates.
Verifying the New Size on Mac
After downloading, open the resized PDF in Preview. Go to Tools → Show Inspector → Page Size. The reported dimensions should match your target size (allowing for small rounding differences). If the size is correct but content appears unexpectedly clipped, re-run with "Fit to page" enabled.
After Resizing on Mac
Resized PDFs are ready to print on the new paper size. Add page numbers if needed, compress for email, or merge with other documents that are already at the new size.
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