Change your PDF's page dimensions — A4, Letter, Legal, or any custom size — with live preview.
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Not every PDF arrives in the size you need — sometimes that means the file's storage size in KB/MB (a form portal rejecting a file that's too small or too large), and sometimes it means the physical page dimensions (a document on US Letter when your printer expects A4). This tool handles both, in two separate tabs, so you don't need to hunt for two different tools.
QuickPDFonline's Resize tool changes your PDF's page dimensions to any standard size (A4, Letter, Legal, A3, A5) or a fully custom size, right in your browser. All processing happens directly in your browser — your files are never uploaded to any server. Unlike tools that rasterize each page into an image, this tool resizes the actual vector content, so text stays sharp and selectable — no blur, no quality loss.
Useful for matching a document to your country's paper standard, preparing a file for a specific printer, or fitting content onto a different page size before sharing.
ध्यान दें (Helpful Tip)
अगर आपकी PDF US Letter size में है और आपको India/Europe में print करने के लिए A4 चाहिए (या इसका उल्टा), तो यहाँ preset से नया size choose करें और "Scale to Fit" select करें — content पूरी तरह proportionally adjust हो जाएगा, कुछ भी crop नहीं होगा। Live preview में download से पहले ही exact result देख सकते हैं।
Click or drag & drop your PDF into the upload area above.
Choose A4, Letter, Legal, A3, A5, or enter a custom size.
See the exact result on screen before downloading anything.
Click Resize — get your PDF with the new page size instantly.
No Quality Loss
Resizes actual vector content — text stays sharp and stays selectable, unlike image-based resize tools.
True Live Preview
The preview is generated using the exact same resize logic as the final download — no surprises.
100% Private
Nothing is uploaded. All resizing runs locally in your browser.
Standard & Custom Sizes
A4, Letter, Legal, A3, A5, or type any exact dimensions in mm, inches, or px.
Both, in two separate tabs. The 📦 File Size (KB/MB) tab changes how much storage space your PDF takes up — increase it toward a target size, or compress it down to one. The 📐 Page Dimensions tab changes the physical page size (like switching from Letter to A4). Pick whichever tab matches what you need — they work independently of each other.
When your target is larger than the current file, the tool appends harmless padding data after the PDF's end marker — most PDF readers ignore anything after this point, so your actual pages, text, and images are completely untouched. This is useful for portals that reject files below a minimum size requirement.
Only pages that actually contain an image are re-rendered as a compressed image at progressively lower quality/resolution until the file fits your target size. Pages with no image — pure text or vector content — are copied through at full quality and stay selectable; they're never rasterized, since that would blur text for no size benefit.
This is expected, though the tool still tries to help. Text and vector content is already extremely compact in a PDF, so there's little to gain without converting it into an image — which would make text blurry and unselectable, so this tool never does that. Instead, for pages with no images, it applies a lossless structural optimization (repacking the PDF's internal objects more tightly and dropping unneeded metadata) — this keeps 100% of the quality and selectable text, but typically only shrinks the file by a small amount rather than a dramatic reduction.
These options are in the Page Dimensions tab. "Scale to Fit" proportionally shrinks or enlarges your content so it fits entirely within the new page size — nothing gets cut off, but text and images become slightly smaller or larger. "Keep Original Size" leaves your content exactly as-is and centers it on the new page — if the new page is smaller than the original, some edges may be cropped.
In Page Dimensions mode, yes — that tab resizes the actual PDF content (text, vector graphics, images) rather than converting pages into flat images, so text stays fully selectable and searchable. In File Size compression mode, pages are converted to images to reduce size, so text will no longer be selectable in the compressed output — this only applies when shrinking the file size, not when resizing dimensions.
Yes. Use the "Pages to Include" field above the two mode tabs — type a range like 1-5, 8, 12-15 and only those pages will be included in the downloaded PDF. This works with both File Size and Page Dimensions modes, and with both increasing and compressing. Leave it blank to include every page, as before.
Never. Both modes — File Size and Page Dimensions, including the live preview — run entirely inside your browser using JavaScript and PDF-lib. Your file is never sent to any server. Once you close the tab, no trace of your document remains anywhere.
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