How to compress PDF for email: Meet attachment size limits every time

Struggling to send a PDF because it’s too large for email attachments? Compressing your PDF is a quick and effective way to reduce its file size without compromising quality.

• Use online PDF compression tools to reduce file size quickly.
• Choose the right compression level for quality and size balance.
• Save the compressed file and verify the attachment meets size limits.
• Always ensure the content remains readable after compression.

Understanding email attachment size limits

Have you ever tried to send an important document, only to be stopped by an error message? “Attachment too large” is a common frustration, especially when dealing with high-quality PDF files. Most email providers, like Gmail and Outlook, impose strict size limits on attachments, typically around 20-25MB. 

The solution is to compress your PDF. This process reduces the PDF file size, making it small enough to attach to any email without issue. This guide will show you how to compress PDFs for email, explain why files get too large, and introduce an online tool designed to solve this problem efficiently. You will learn how to make any PDF smaller for email and ensure your documents always reach their destination.

Why PDF documents fail to send by email

When you can’t send a PDF, it’s almost always because the file size is too big. Email services have attachment limits to manage their servers and ensure speedy delivery for all users. A large file can get stuck or rejected entirely. Several factors contribute to a large PDF file size.

Elements that increase the size of a PDF include:

• Embedded fonts: Including custom fonts within the file ensures it looks the same on all operating systems, but it also adds to the file size.
• Layers and vector graphics: Complex design elements, though sharp, contribute significantly to the overall PDF size.
• Metadata: Hidden information like author details, keywords, and creation dates adds extra weight to the document.

Understanding these factors is the first step toward managing your PDF file size. An effective PDF compressor addresses these issues to reduce file size significantly.

How do you compress a PDF to send via email with pdfFiller?

The most reliable way to reduce PDF size for email is by using a dedicated compression tool. An online PDF compressor offers a quick and easy solution without needing to install software. pdfFiller provides a powerful yet user-friendly tool that lets you compress your PDF in just a few steps, giving you full control over the final file size and visual quality.

This process is designed to be straightforward. Here’s a step-by-step guide to compress a PDF with pdfFiller.

1. Upload your document

Log in to your pdfFiller account. From your dashboard, you can upload a file from your device using the drag-and-drop interface or import it directly from a cloud service like Google Drive.

2. Open the compression tool

Once your PDF file is uploaded, open it in the pdfFiller editor. Click the Compress document button from the top-right menu.

Screenshot: pdfFiller’s Compress PDF tool icon in the top-right toolbar.

3. Set file format and destination 

In the compression tool window, you can choose the desired file format for your compressed document (Word, Excel, PDF, etc). You can also select a destination folder to save the compressed file.

4. Choose your compression level

pdfFiller offers several optimization settings. You can select a compression level that fits your needs:

• High: Best for preserving the original file quality with minimal size reduction.
• Medium: A good balance between file size and image quality. This is often the recommended setting for email attachments.
• Low: Provides the maximum file size reduction, which is ideal when you need the smallest file possible and can accept a lower resolution for images.

Screenshot: pdfFiller’s pop-up window for the PDF compression feature allows users to conveniently select the file format, destination, and desired document quality.

5. Save and download the file

After selecting the compression level, click Save. The online tool will process the document and instantly reduce file size. The compressed document will be downloaded automatically.

Using this method, you can easily compress a PDF to under 25MB. The tool helps you shrink your PDF for an email attachment without losing quality, which is essential for professional communication. You can also compress multiple PDFs at once, streamlining your workflow when dealing with large documents.

Bonus tip: For added security when emailing documents, we recommend compressing them into PDFs. You can also add an extra layer of protection by password-protecting your documents with pdfFiller.

What are the email attachment size limits?

Each email provider has its own rules for how large email attachments can be. Exceeding these size limits is the primary reason you’ll see an error message when trying to send a large PDF file. Knowing these restrictions helps you choose the right compression level for your document.

Here is a quick comparison of the maximum attachment size for popular email providers:

As a best practice, aim to compress your PDF to a file size well below the 20MB mark. This ensures your email attachments are sent successfully across all major platforms without any issues.

What if the compressed PDF is still too large?

Sometimes, even after you compress a PDF, the file size may still be too large for standard email attachments. This often happens with a document containing many high-resolution images or a lengthy scanned PDF. In these cases, you have a few excellent alternative solutions.

Instead of attaching the file directly, you can upload the document to a secure cloud service and share a link.

Popular options for this include:

• Google Drive: Upload your file and share a direct link with specific permissions.
• Dropbox: A reliable cloud sharing service for sending large files securely.
• pdfFiller: Securely email your compressed PDF directly from your pdfFiller account or create a shareable link and message it directly to a certain recipient.

Screenshot: A user interface modal showing document sharing options in pdfFiller, with the ‘Email’ button highlighted.

This approach provides better security for sensitive documents, as you can often control who can access the file.

Best practices for emailing PDF files

To ensure your workflow is always smooth, it helps to adopt a few best practices when you compress PDF files for email. These simple habits can save you time and prevent sending issues.

• Compress before sending: Always run your PDF through a compression tool before you attach it. This small step can prevent the vast majority of sending errors.
• Test the compressed file: Open the compressed PDF to ensure the visual quality is acceptable. A good PDF compressor will keep your text sharp and images clear, but it’s always wise to double-check.
• Use links for very large files: If a file is over 25MB, even after compression, use a cloud service to generate a shareable link. It’s a more reliable method for extremely large PDFs.
• Consider zipping multiple files: If you need to send multiple PDFs, you can compress them into a single .zip file. While this doesn’t reduce the size of the individual PDF files as much as a dedicated PDF compression tool, it helps organize them into one download. However, zipping doesn’t solve the core issue of a large PDF file size.

By integrating these practices, you can handle any PDF document with confidence, knowing it will be delivered successfully every time.

Disclaimer: The information contained in this blog post is provided for general informational purposes only and does not constitute formal legal advice.

Final thoughts

Dealing with large PDF files that block your emails is a problem you no longer need to face. With the right knowledge and a reliable online tool, you can reduce PDF size for email in seconds. 

pdfFiller offers an all-in-one solution to compress, edit, and share your documents from a single, secure platform. Its intuitive PDF compressor gives you full control over the compression level, allowing you to find the perfect balance between file size and quality. From there, you can easily download your optimized PDF or share it directly via email or a secure link.

Transform your document workflow today. Try pdfFiller for free and see how easy it is to compress and manage your PDF files.

Glossary

• Compression level: A setting in a compression tool that determines how much a file’s size is reduced. Higher compression results in a smaller file but may lower image quality.
• Attachment limit: The maximum file size that an email service provider allows for files sent as attachments in an email.
• Zipping: The process of packaging one or more files into a single archive (.zip file). It can offer some compression, but it is primarily used for organization.