Resize PDF
Change PDF page size — A4, Letter, Legal, custom dimensions with fit options. Runs entirely in your browser.
About this tool
Change the page dimensions of any PDF to A4, Letter, Legal, A5, A3, Tabloid, or custom sizes in points. Choose how content fits: Scale to fit maintains aspect ratio, Stretch fills the new dimensions, or Keep original size centers the content without scaling. All pages are resized consistently using pdf-lib's page manipulation API. Content is preserved — the tool adjusts page boxes and optionally scales content streams. No upload, no sign-up, no watermark.
How to use it
Quick steps to get the most out of this utility.
- 1
Drop your PDF
Any size up to 100 MB.
- 2
Choose target size
A4, Letter, Legal, or custom in pt.
- 3
Select fit mode
Scale, stretch, or center.
- 4
Resize & download
One click, all pages updated.
Standardize PDF page sizes
A common workflow: you receive a PDF in A4 from a European colleague but need Letter for US printing. Or you have a mix of page sizes in a scanned document and need to standardize. This tool resizes all pages to a consistent target using pdf-lib in your browser, with intelligent fit options to avoid cut-off content.
Frequently asked questions
Is this safe? Does it upload my PDF?+
No upload whatsoever. Resizing runs entirely in your browser using pdf-lib. Your PDF never leaves your device.
What is the maximum file size?+
PDFs up to 100 MB are accepted. Files over 30 MB may be slower on mobile.
Does it work offline?+
After the page has loaded once, yes — pdf-lib is cached and resizing runs locally.
Will this work on iPhone / iPad?+
Yes, on modern iOS Safari.
What page sizes are supported?+
A4, Letter, Legal, A5, A3, Tabloid, and custom dimensions in points (1 inch = 72 pt).
What fit modes are available?+
Scale to fit maintains aspect ratio; Stretch to fill distorts to fill the new size; Keep original size centers content without scaling.
Will resizing affect print output?+
Yes — the new page size is the actual media box. Printers will use the new dimensions. Choose "Scale to fit" to prevent content from being cut off.
Keep exploring
More utilities and reading from Toolisk.