Resize PDF Pages – Change Page Size Online Free

Change PDF page size to A4, Letter, A3 or custom and add margins or padding. Free online resizer, no watermark.

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Private and short-lived: every upload is erased automatically 72 hours after you last open it.

Step by step

Resize a PDF: step by step

Change PDF page size to A4, Letter, A3 or custom and add margins or padding. Free online resizer, no watermark.

  1. 1

    Upload and pick the mode

    Drop in a document and choose: Add margins and padding widens the sheet around its content, Change page size puts every page on new paper, and More options reveals Reduce the file size. Files are deleted after 2 hours.

    Choose an option: the Add margins and padding card selected beside the Change page size card, above the Continue button and the More options link
  2. 2

    Set the margins or the paper

    For margins, type Top / Left / Right / Bottom in inches or cm — half an inch on every side turns 8.27 × 11.69 in into 9.27 × 12.69 in. For a new paper size, pick a preset from A1 down to Executive or type a custom width and height — every page is fitted keeping its proportions.

    The Margins panel: Top, Left, Right and Bottom boxes holding 0.5 with the inch and cm switch, above the Resize PDF button The Page size panel: a dropdown showing A4 (8.27 x 11.69 in) and the note “Every selected page is fitted onto the paper, keeping its proportions.”
  3. 3

    Check the sizes and run

    The size under every page updates as you type, so the outcome is visible before you commit. Pick pages with Page Selection (Select All / Odd / Even / Deselect All) if only some should change, then press Resize PDF.

    The Page Selection button above two selected page thumbnails, each showing its new size — 9.27 x 12.69 in — under the page number
  • Margins that breathe

    Half an inch on each side grows A4 from 8.27 × 11.69 to 9.27 × 12.69 in.

  • Any paper size

    A1 to Executive presets or a custom width and height — fitted, proportions kept.

  • inch or cm

    The unit switch converts the margins — type in whichever you think in.

  • See it before you run

    The size under every page updates as you type — the new dimensions are the plan.

  • All, odd, even — or picked pages

    Page Selection limits the change to the pages you chose; the rest stay as they are.

  • Private by default

    No account, no watermark — and every file is automatically deleted after 2 hours.

More tool information

What the other tools do

Organize PDF

Rebuilds the document's page order: reorder, rotate, duplicate, delete or insert pages. Thumbnails make the change visible before it is applied, so the result is not a guess.

Flip

Mirrors pages horizontally or vertically — the fix for artwork printed back to front, a transfer sheet, or a scan made through the back of the paper.

Split in half

Cuts two-page spreads into single pages: a scanned book spread, an A3 sheet that should read as two A4 pages, or a form printed two-up. The cut follows the page's own shape unless you force a direction.

Compare

Compares two versions of the same document and names every meaningful difference: changed wording, numbers and dates, inserted or removed blocks, and pages that shifted. The result is a report you can read, not a highlight layer you have to interpret.

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