Upload a PDF to change its page size
Convert oversized, undersized, or mixed-size pages to A4, Letter, Legal, or custom dimensions.
Everything you need to fix a page size
Real page geometry, with the accuracy controls underneath it.
Any size, any unit
A0–A6, Letter, Legal, Tabloid, B4/B5 and more — or a custom size in mm, cm, inches or PDF points.
Five fitting modes
Fit content, fill the page, stretch, change the border only, or crop to size. Fit never crops.
Margins and alignment
Presets or per-side values, a nine-point alignment grid, and drag-to-position in the preview.
Precise page selection
All pages, a range like 1-3,6,8-12, odd or even, or only the pages whose dimensions are unusual.
Crop shown, never silent
Anything that would fall off the sheet is drawn, measured and named before you export.
Preview that is the output
The preview runs the exporter’s own transform. What the canvas draws is what the file gets.
See the transform before you upload anything
A real 1440 × 5834 pt contract page, resized by the same function the exporter uses. Change the settings and watch the geometry — including exactly what a cropping mode would remove.
- New page
- 595 × 842 pt
- Content scale
- 13%
- Cropping
- None
A4 is 595 × 842 pt. Your own file never reaches a server — this page does the same arithmetic in your browser.
Resize PDF pages — without rebuilding your document
To change a PDF’s page size, open the file above, choose a target size such as A4, pick Fit all content, and press Resize PDF. Your PDF content is scaled directly inside the document by a page-level transformation matrix. Text, vectors, images, spacing and page structure remain intact instead of every page being converted into a screenshot.
- Nothing Is
Rasterized - Preview Before
Download - Links & Fields
Stay Aligned - 100% Private
Never Uploaded
Before and after
Before
1440 × 5834 pt
- Unusual size
- Rejected by upload portals
- Difficult to sign or print
After
595 × 842 pt (A4)
- Complete content preserved
- Text still selectable
- Ready to sign, share or upload
How to change the page size of a PDF
Open your PDF
Drag and drop the file or choose it from your device. Every page is measured in your browser and nothing is uploaded.
Choose the new page size
Pick A4, Letter, Legal, A3, Tabloid or any other preset, or enter a custom width and height in millimetres, centimetres, inches or points. Orientation can follow each page, or be forced to portrait or landscape.
Decide how the content meets the page
Fit all content scales the page down until everything is visible. Fill the whole page covers the sheet and crops the overflow. Change page border only keeps the content at 100% and moves the boundary around it. Add margins and choose an alignment.
Preview and download
Compare the original page beside the result, check the scale, margins and any cropped area, then resize and download the new PDF.
Which resize mode should I use?
| Mode | What it does | Best for | Can it crop? |
|---|---|---|---|
| Fit all content | Scales the page proportionally until everything fits | Contracts, reports, forms, invoices — anything that must stay whole | No — never |
| Fill the whole page | Scales proportionally until the sheet is covered | Posters, scans and full-page graphics | Yes — the overflow |
| Stretch to page size | Scales width and height independently | Rarely — it distorts text and logos | No, but it distorts |
| Change page border only | Keeps content at 100% and moves the boundary | Adding margins, or placing content on a bigger sheet | Yes, if the page shrinks |
| Crop to selected size | Cuts the page down to the new boundary | Trimming a page to an exact size | Yes — by design |
What actually happens to your file
A PDF page is a list of drawing instructions plus a MediaBox that says how big the sheet is. We never edit an instruction. The page keeps its own content stream, wrapped in q <matrix> cm … Q — one affine transform that scales, moves and if necessary rotates everything at once — and the page is given a new MediaBox and CropBox. Because annotations, links and form widgets are moved by that same matrix, the interactive layer cannot drift away from the pixels it points at.
- Text stays real text — selectable, searchable and sharp at any zoom.
- Embedded fonts and glyph positions are carried through untouched.
- Vector graphics, lines and tables stay vector; nothing is flattened to pixels.
- Images keep their original compression. Nothing is re-encoded.
- Links, annotations and form widgets move by the same matrix as the content.
- Page rotation, transparency, clipping paths and layer order are preserved.
Page sizes in points, millimetres and inches
| Size | Millimetres | Inches | PDF points |
|---|---|---|---|
| A3 | 297 × 420 mm | 11.69 × 16.54 in | 842 × 1191 pt |
| A4 | 210 × 297 mm | 8.27 × 11.69 in | 595 × 842 pt |
| A5 | 148 × 210 mm | 5.83 × 8.27 in | 420 × 595 pt |
| US Letter | 216 × 279 mm | 8.5 × 11 in | 612 × 792 pt |
| US Legal | 216 × 356 mm | 8.5 × 14 in | 612 × 1008 pt |
| Tabloid | 279 × 432 mm | 11 × 17 in | 792 × 1224 pt |
One inch is exactly 72 PDF points and 25.4 millimetres, so A4’s 210 × 297 mm is 595.28 × 841.89 points. Custom sizes are accepted in any of the four units and the converted point value is shown as you type — switching units converts the numbers rather than changing the page.
Why is my PDF page 1440 × 5834 points?
That shape — narrow and enormously tall — is the signature of a webpage printed to PDF, a long screenshot, or a scanner set to a continuous feed. The file is perfectly valid; it simply has no page size a printer, a signing portal or a document management system knows what to do with.
Converting it to A4 with Fit all content scales the entire page down proportionally until it fits, adds the margins you asked for, and leaves the text, tables and signatures in exactly the same relationship to each other. Nothing is cropped, and the result opens as an ordinary A4 document everywhere.
Mixed page sizes in one PDF
Files assembled from several sources often end up with A4, Letter and a stray landscape page in the same document. Every page is measured on open and grouped, so you see the mix before you touch anything — “8 pages A4, 2 pages 1440 × 5834 pt, 2 pages US Letter”. One click standardises all of them, and each page keeps its own orientation unless you ask otherwise. You can also resize only the pages with unusual dimensions and leave the correct ones bit-for-bit unchanged.
Resizing before signing
Most e-signature platforms expect a standard page. Resizing to A4 or Letter first is usually what makes a stubborn upload work. One honest caveat: changing page dimensions rewrites the PDF, so a document that is already digitally signed will have that signature invalidated. Signed files are detected on open and flagged before export — resize first, then sign, and both work.
Limits
Files up to 10MB and 100 pages. Long documents are processed page by page with a progress bar you can cancel. Password-protected PDFs must be unlocked first. Page edges are capped at 200 inches (14400 points), which is the limit of the PDF format itself, not of this tool.
How this compares to a basic PDF resizer
| Capability | Basic PDF resizers | This tool |
|---|---|---|
| Show original page dimensions | Sometimes | Yes |
| Detect mixed page sizes | Rarely | Yes |
| Fit without cropping | Basic | Yes |
| Live crop warning | Rarely | Yes |
| Preserve vector content | Unclear | Yes |
| Resize selected pages only | Sometimes | Yes |
| Custom margins per side | Limited | Yes |
| Page-by-page preview | Rarely | Yes |
| Keep annotations and links aligned | Often ignored | Required |
Private processing
Your PDF never leaves your browser. Reading, measuring, previewing and rewriting all happen on your own machine, so there is nothing to upload, nothing stored on a server and nothing to delete. See our privacy policy for details.
Related PDF tools
- Sign PDF — the usual next step once a document is a standard size.
- Compress PDF — reduce the file size in megabytes, which is a different job from changing the page dimensions.
- Edit PDF — change the text and images themselves, not the sheet they sit on.
- Merge PDF — combine files, then standardise the result here.
- Change PDF page color — recolor the page background without touching the layout.
- How PDF content streams work — the format detail this tool is built on.
- All PDF tools — the full directory.
Frequently asked questions
Resizing changes the physical page dimensions, such as converting a 1440 × 5834 point page to A4. Compressing reduces the file size in megabytes but normally does not change the page dimensions at all. They solve different problems and can be used together.
Yes. Choose A4 and use Fit all content. The whole page is scaled down proportionally until it fits inside A4, so nothing is cropped and the layout stays exactly as it was — only smaller.
No. The page is treated as one unit: text, images, vectors, tables and spacing are transformed together by a single matrix, so their relationship to each other never changes. Fit all content is the safest option because it also guarantees nothing falls off the page.
It usually comes from an export that had no page size to work from — a webpage printed to PDF, a screenshot, a long scanner pass, a design application with a custom artboard, a presentation, or a badly configured print process. The page is valid, it is just not a document size any printer or signing portal expects.
Yes. You can resize one page, a hand-picked selection, a range such as 1-3,6,8-12, only the odd or even pages, only the pages with unusual dimensions, or every page matching the size of the page you are viewing. Pages you do not select are copied through untouched.
Yes. Pick a target size with Pages set to All pages. Leave orientation on "Match each page" and every page becomes, for example, A4 while a landscape page stays landscape. Choose Portrait or Landscape instead to force them all one way.
Fit all content and Stretch never crop. Fill the whole page, Change page border only, and Crop to selected size can crop, depending on the sizes involved. Whenever that happens the preview shows the lost area faded and marked, the setting panel says "Will be cropped", and the export summary counts the affected pages. Cropping is never applied silently.
Yes. Choose None, Narrow (5 mm), Normal (10 mm), Wide (20 mm) or set custom top, right, bottom and left values in millimetres, centimetres, inches or points. The margin boundary is drawn as a dashed line in the preview so you can see it before you export.
Millimetres, centimetres, inches and PDF points. One inch is 72 PDF points and 25.4 millimetres, so A4 at 210 × 297 mm becomes 595.28 × 841.89 points. The converted point size is shown as you type, and switching units converts the numbers rather than changing the page.
No. Pages are never converted to images. The original content stream is reused verbatim and wrapped in a transformation matrix, so text stays selectable and searchable, embedded fonts stay embedded, vector art stays vector, and images keep their original compression at any zoom level.
Yes. Every annotation rectangle, link area, highlight, ink stroke and form widget is moved by exactly the same matrix as the page content, so the interactive layer and the visible layer cannot drift apart. If an annotation ends up outside the new page boundary, you are told before you download.
Changing the page dimensions modifies the PDF, which may invalidate an existing digital signature. Signed documents are detected on open and flagged before you export. We do not claim signatures always survive — if the signature matters, resize first and sign afterwards.
No. Resizing changes the page width and height. Rotating changes the orientation of the page or its content. They are separate controls here: changing the page orientation swaps width and height, and a separate "Rotate the content to match" option turns the content a quarter turn.
The visible CropBox is what gets resized, because that is what a reader shows you. The exported page also carries a clip to the original CropBox, so any content that was hidden outside it stays hidden instead of suddenly appearing on the new page.
No. This tool runs entirely in your browser. Your PDF is read, analyzed, previewed and rewritten on your own machine and never leaves it, so there is nothing to store, nothing to delete and nothing to leak.
You can resize PDFs up to 10MB and 100 pages. Long documents are processed page by page with a progress bar you can cancel at any time. Pages larger than 200 inches on an edge are refused, because that is the limit of the PDF format itself.