Blog | PDFen

tutorials

How to Convert an S/MIME Encrypted Email to PDF (Without Handing Over Your Keys)

Can't convert an S/MIME encrypted email to PDF? You can't upload it as-is. The safe fix is to make an unencrypted copy first, without ever sharing your private key.

Daan van Tongeren

Jun 09, 2026 Read More

tutorials

How to Convert Email to PDF With Headers (for Archiving & Records)

Convert email to PDF while keeping headers, attachments, and transport data intact, for single files, bulk mailbox archives, and PDF/A.

Daan van Tongeren

Jun 06, 2026 Read More

tutorials

How to Convert a PDF to Grayscale (Without Adobe Acrobat)

Convert a color PDF to true grayscale online without Acrobat. Learn why "Print in Grayscale" fails and how to avoid color print charges.

Daan van Tongeren

Jun 06, 2026 Read More

tutorials

How to Make a Print-Ready PDF: The Complete Guide (CMYK, Bleed, Fonts & PDF/X)

What print-ready means, the four things every printer checks, and how to verify and fix your PDF for free, no Acrobat required.

Daan van Tongeren

Jun 06, 2026 Read More

tutorials

How to Prove an Email Was Sent: Headers, Hashes, and Court-Ready Evidence

A screenshot proves nothing. Learn what actually proves an email was sent: headers, SPF/DKIM/DMARC results, and a SHA-256 integrity anchor.

Daan van Tongeren

Jun 06, 2026 Read More

General

The 5 Best Ways to Share Your PDF (Fast, Secure, and Hassle-Free)

Discover the five best ways to share your PDF, from download links to QR codes. Learn when each method works best and how PDFen lets you share your documents quickly and effortlessly.

Jip Oomen

Feb 20, 2026 Read More

General

Email-Supported Conversion: A Quicker Way to Convert Your Files

Converting, merging, or compressing your files has just become even more efficient with Email supported conversion. Simply attach your files, click the 'send' button in your favorite email provider, and your files are converted!

Jip Oomen

Feb 20, 2026 Read More

General

Email Archive File Formats Explained: OLM, PST, OST & MBOX

Bundling and saving your emails correctly is crucial; for legal compliance, organization continuity, and system resilience. Your emails are best exported and archived using OLM, PST, OST or MBOX file formats.

Jip Oomen

Feb 05, 2026 Read More

General

Why You Should Add a Cover Page to Your PDF

Cover pages form great additions to structure and professionalize your PDF output. Find out how to use this handy PDF add-on

Jip Oomen

Jan 27, 2026 Read More

General

Your PDF Doesn’t Work? 8 Common Reasons Why a PDF Won’t Open (and How to Fix It)

Your PDF not opening is one of the most common errors with PDF documents. Luckily, 99% of the time, this is easy to solve. Downloading the file again, or asking others to re-send your PDF document will fix any error most of the time. Still doesn’t work? Look at these 8 malfunctioning causes and how to quickly fix them:

Jip Oomen

Dec 15, 2025 Read More

General

PDF/A Explained: What It Is, Why It Matters, and How to Convert Your Files with PDFen

If you're storing your PDF files you have better heard of PDF/A files. They can safely and reliably store your files for years to come. We explain what PDF/A is all about and how to work with it.

Jip Oomen

Nov 26, 2025 Read More

General

Organize, Store & Share: Easily Merge Your Documents

To manage and organize all kinds of documents within your organization, being able to merge them is ideal. Explore our 9 supported file formats to merge now.

Jip Oomen

Nov 26, 2025 Read More

General

How to organize your PDFs: 5 tools you should know about

When working with any digital file, you'll always encounter some kind of impracticality: the pages are rotated, the file is locked, etc. Luckily, with PDF organization tools these can be easily overcome. Learn how and when to use PDFen organization tools.

Jip Oomen

Nov 26, 2025 Read More

General

Compressing and repairing: How to optimize your PDFs

Professionalize your PDFs by using 5 essential PDF optimization tools. Learn when and how to repair, compress, rasterize, OCR, or archive your PDF now.

Jip Oomen

Nov 26, 2025 Read More

General

Safety and Privacy at PDFen: the 5 ways that PDFen ensures your online safety

Privacy and security at our converter is #1 priority. PDFen is 2SOC and GDPR compliant, will automatically delete your data, and enforces strict internal security measures. We don't take any risk when it comes to guaranteeing our customer's safety and privacy on the platform.

Jip Oomen

Nov 15, 2025 Read More

General

Email Archiving and Email to PDF/A Conversion: How and Why It Matters

Archiving your emails is vital for reasons of legal compliance, safety, and efficiency. With PDFen, you can seamlessly bulk convert countless email files, its details and attachments into reliable PDF documents, the gold standard for (email) archiving.

Jip Oomen

Oct 25, 2025 Read More

General

What Is OCR and Why Should You Use It?

With OCR (Optical Character Recognition) you can make your files editable, copyable and searchable. OCR recognizes and analyzes text and images in your document, and streamlines its conversion into PDF or Word output, meaning you obtain clear, organized and reliable documents by using OCR

Jip Oomen

Oct 25, 2025 Read More

General

Top 3 PDF platforms compared

PDFen, IlovePDF and Freeconvert.com all offer well-functioning and quick tools to convert documents from and to PDFs. PDFen is ideal for its PDF/a, email, and bulk PDF coverage, IlovePDF for watermark and signature tools, and freeconvert.com for the large file type offering.

Jip Oomen

Oct 15, 2025 Read More

Extra benefits:

Organize

Optimize

To PDF

From PDF

Merge

Other

PDFengine Blog

How to Convert an S/MIME Encrypted Email to PDF (Without Handing Over Your Keys)

How to Convert Email to PDF With Headers (for Archiving & Records)

How to Convert a PDF to Grayscale (Without Adobe Acrobat)

How to Make a Print-Ready PDF: The Complete Guide (CMYK, Bleed, Fonts & PDF/X)

How to Prove an Email Was Sent: Headers, Hashes, and Court-Ready Evidence

The 5 Best Ways to Share Your PDF (Fast, Secure, and Hassle-Free)

Email-Supported Conversion: A Quicker Way to Convert Your Files

Email Archive File Formats Explained: OLM, PST, OST & MBOX

Why You Should Add a Cover Page to Your PDF

Your PDF Doesn’t Work? 8 Common Reasons Why a PDF Won’t Open (and How to Fix It)

PDF/A Explained: What It Is, Why It Matters, and How to Convert Your Files with PDFen

Organize, Store & Share: Easily Merge Your Documents

How to organize your PDFs: 5 tools you should know about

Compressing and repairing: How to optimize your PDFs

Safety and Privacy at PDFen: the 5 ways that PDFen ensures your online safety

Email Archiving and Email to PDF/A Conversion: How and Why It Matters

What Is OCR and Why Should You Use It?

Top 3 PDF platforms compared

Your file is too large Your files are too large Too many pages

Extra benefits:

PDFengine Blog