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Resize PDF
Resize PDF pages to A4, US Letter, Legal, A5, A0, or any custom size in your browser, scaling the content to fit or keeping it as is. Free PDF resizer, no upload.
How to use Resize PDF
- Drop a PDF file.
- Pick A4, Letter, Square, or a custom width × height.
- Download the resized PDF.
How to resize a PDF online for free
Resize PDF pages without uploading: PaperKit changes the page size of every page in a PDF. Choose A4, US Letter, or Square, or type a custom width × height in points (including A0–A5 and Legal), then click Resize PDF. The tool runs locally with pdf-lib and the resized file downloads with no signup.
Resize the pages, or make the file smaller?
Resizing here changes the page dimensions, for example from US Letter to A4, and barely changes the file size. If what you need is a smaller file in MB or KB, to fit an email or an upload limit, use Compress PDF instead: it re-encodes the images inside and can aim for a size such as 500 KB or 1 MB.
How to resize a PDF in three steps
1. Drop a PDF onto Resize PDF. 2. Pick A4, Letter, or Square, or enter a custom width × height in points. 3. Click Resize PDF and download paperkit-resized.pdf. Every page in the file is set to the same size. Nothing is uploaded, and there is no watermark.
Paper sizes in points: A0–A5, Letter, Legal
PDF measures pages in points, with 72 points to the inch. PaperKit offers A4, Letter, and Square (600 × 600) as one-click presets; enter any other size below as width x height in points.
- A0
- 2384 × 3370 pt (841 × 1189 mm)
- A1
- 1684 × 2384 pt (594 × 841 mm)
- A2
- 1191 × 1684 pt (420 × 594 mm)
- A3
- 842 × 1191 pt (297 × 420 mm)
- A4
- 595 × 842 pt (210 × 297 mm)
- A5
- 420 × 595 pt (148 × 210 mm)
- US Letter
- 612 × 792 pt (8.5 × 11 in)
- US Legal
- 612 × 1008 pt (8.5 × 14 in)
- 4 × 6 in label
- 288 × 432 pt
Convert a PDF from Letter to A4, or A4 to Letter
The most common reason to resize is printing a document made in one region on paper from another. A4 is 17 points (about 6 mm) narrower and 50 points (about 18 mm) taller than Letter. Pick the target preset and every page is set to that size so the printer no longer has to scale or shift it.
Fit to page or keep the content size
Fit to page, the default, draws every page scaled proportionally and centred on the new sheet, the way a printer's "fit to page" works, so a Letter document becomes a true A4 document with nothing clipped. Keep content size only changes the page box: content stays at its original scale anchored to the bottom-left corner, so shrinking can clip the top and right edges while enlarging adds white space. Fit rebuilds the pages, which drops links, bookmarks, and form fields; Keep content size preserves them. Use Crop PDF when you want to remove margins rather than change the sheet size.
Resize a PDF to A0 or another large format
Poster and plotter jobs often need A0, A1, or A2. Type the points from the table above as width x height (for example 2384x3370 for A0) and run Resize PDF. With Keep content size the content is not scaled, so an A4 drawing placed on an A0 page will sit in the bottom-left with a large empty area; crop or recreate the artwork if you need it to fill the sheet.
Custom sizes for labels, slides, and phone screens
Type a custom size as width x height in points, such as 600x900. For inches multiply by 72, so a 5 × 7 inch card is 360x504. This is handy for making a single page match a label printer, a slide deck, or a mobile-friendly reading size.
Resize PDF is not the same as compress PDF
Many searches for "resize PDF" or "pdf resize" actually want a smaller file in megabytes. Page size has almost no effect on file size, so if your goal is to get under an upload limit, use Compress PDF, which rewrites the file locally in the browser.
Next steps
- Trim margins instead of changing page size
- Shrink the file size in megabytes
- Rotate pages before resizing
- Prepare a paper PDF for submission
Related PDF tools
- Crop PDF — Crop PDF margins with a visual crop box or automatic whitespace detection, on every page and across several files at once.
- Compress PDF — Shrink a PDF by re-encoding the photos and scans inside it at the quality you choose, or fit it under 100 KB, 500 KB or 1 MB, all in your browser.
- Rotate PDF — Rotate selected pages of a PDF by 90, 180, or 270 degrees and save the result.
Resize PDF guides
- IEEE conference paper margins: the official Letter and A4 numbers
- Resize a PDF to A4 (210 × 297 mm) without uploading it
- Resize a PDF to US Letter (8.5 × 11 in) without uploading it
- Final PDF checks before paper submission
- Prepare an academic PDF for blind review
Frequently asked questions
How do I resize a PDF to A4 online for free?
Drop the PDF on PaperKit Resize PDF, choose the A4 preset, and click Resize PDF. Every page is set to 595 × 842 points and the file downloads without leaving your browser.
How do I resize a PDF to A0?
Enter 2384x3370 in the custom size field (A0 in points) and click Resize PDF. A1 is 1684x2384, A2 is 1191x1684, and A3 is 842x1191. Content is not scaled to fill the page.
Does resizing a PDF scale the content?
With Fit to page, yes: each page is scaled proportionally and centred on the new size, so nothing is clipped. With Keep content size, no: only the page box changes, which preserves links and form fields but can clip or leave white space.
Should I resize or crop my PDF?
Resize when a printer or portal needs a different sheet size (A4, Letter, A0). Crop when you want to remove white margins or borders and keep the content at its current scale.
Can I enter a custom page size?
Yes. Type width x height in points, for example 600x900. One inch is 72 points, so a 4 × 6 inch label is 288x432 and a 5 × 7 inch card is 360x504.
Will resizing make my PDF file smaller?
Not noticeably. Page dimensions have almost no effect on file size. To reduce megabytes, use Compress PDF, which rewrites the file and removes metadata.
Is my PDF uploaded when I resize it?
No. PaperKit resizes the pages with pdf-lib inside your browser tab, so the document is never sent to a server.