PDF tools
Resize PDF for email
Tune dimensions for attachments and portals.
Run Resize PDF for email online
Upload your file and run the job. Processing uses HTTPS and temporary storage; see the FAQ below for retention.
Enable JavaScript to use the interactive tool. Read the instructions, limitations and FAQs below before starting.
Many email servers and client portals reject attachments above a certain file size — commonly 5 MB, 10 MB, or 25 MB depending on the provider. Resizing a PDF for email doesn't just mean compressing it; it can also mean adjusting the page dimensions so that each page occupies less space, particularly if the original was created for A3, tabloid, or custom print sizes.
This tool rescales PDF pages to a target page size (A4 or Letter by default) and recompresses embedded images to bring the overall file size within email-friendly limits. It is especially useful for design agencies sharing proof PDFs, architects sending site plans, and print shops delivering press-ready files that are too large for direct email.
Beyond strict size reduction, resizing PDF pages for email also ensures that recipients using standard PDF viewers see the document at the correct zoom level — A3-to-A4 rescaling means no horizontal scrolling and no need to zoom out to see the full page at once.
How to use this utility
- Open this page and upload the file you want to process.
- Choose options if shown, then run the action. Processing is designed to finish within seconds for typical files.
- Download the result immediately. Server-side jobs use temporary storage with automatic expiry.
Common use cases
- Shrinking an oversized architectural or engineering drawing to A4 for email delivery.
- Reducing a high-resolution print-ready brochure to a screen-quality preview for client approval.
- Rescaling A3 spreadsheet exports to A4 before attaching to an HR report email.
- Making a large product catalogue PDF small enough to pass through a company's email gateway.
- Trimming page margins on a scanned document to remove wasted white space and reduce file size.
Tips for best results
- 1If compression alone doesn't meet your email limit, try reducing the page size one step (A3→A4, A4→A5) — page area reduction scales image storage roughly by half.
- 2For non-standard page sizes (e.g., custom print layouts), choose 'Scale to A4' rather than 'Crop to A4' to avoid cutting off content.
- 3Check whether your email provider blocks PDFs of certain types (e.g., password-protected) before sending.
- 4Use 'Grayscale PDF' conversion first if your document has colour images that aren't essential — this can reduce size by 50–70%.
- 5For extremely large files (over 100 MB), split the PDF into multiple smaller parts and send as separate email attachments.
Frequently asked questions
- Is Konnect2Tools free?
- Yes. Public tools are free and do not require an account.
- Do you keep my files?
- Server inputs and outputs expire according to the job retention setting (two hours by default) and are removed by periodic cleanup. Download the result promptly; deletion is not immediate at download.
- Is the Resize PDF for email tool safe to use?
- Use HTTPS and only files you have the right to process. Server jobs temporarily store inputs and outputs until expiry and periodic cleanup. Keep an original copy.
- What is the difference between resizing and compressing a PDF?
- Compressing reduces file size by lowering image quality and stripping metadata while keeping page dimensions the same. Resizing changes the actual page dimensions (e.g., A3 to A4), which also reduces storage since smaller pages contain less image data.
- Will resizing affect the readability of text in the PDF?
- Vector text (from word processors or design software) scales cleanly and remains readable at any size. Rasterised or scanned text may become slightly less sharp if the page is scaled down significantly.
- Can I resize only specific pages in a multi-page PDF?
- The current tool applies the target dimensions to all pages uniformly. To resize specific pages only, split those pages out first, resize, then re-merge with the untouched pages.
- My email still bounces after resizing — what else can I try?
- Some email servers reject PDFs based on metadata, embedded scripts, or encryption rather than file size. Try the Repair PDF tool, then re-check. Alternatively, share via a cloud link (Google Drive, Dropbox) instead of a direct attachment.
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