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Compare PDF/A vs PDF/X vs PDF/E—we help you pick the right format for archiving, printing, or engineering without guessing every time.

Understand PDF file types so you can pick the right format for archiving, printing, sharing, or accessibility without guesswork every time.

Accessibility is a must. PDFs should be readable by all, including those using screen readers. Here’s all you need to know for accessible PDFs.

Embed PDF in email using four simple methods, so your recipients can open, read, and act on your documents quickly without confusion or delays.

Turn scanned PDFs into searchable PDF files with OCR so you can find, copy, and reuse text in seconds on any device without manual retyping.

Create a mobile friendly PDF that’s easy to read, fill out, and share from any phone. Transform any PDF for mobile with Smallpdf.

Edit PDF in Google Drive without leaving your browser. Use Google Docs for quick tweaks or our Smallpdf add-on for proper PDF editing.

Easily underline text in a PDF document online with Smallpdf. Highlight key points, add emphasis, or mark notes—no downloads needed.

Do a strikethrough in PDF the easy way with Smallpdf. Edit, proofread, or mark up your files online in seconds, with full security and zero installs.

Highlight any PDF in your browser in seconds with Smallpdf. No downloads or signups needed, plus quick fixes for scanned pages and protected files.

Align text in a PDF quickly with Smallpdf’s online editor. No signups needed—just upload, edit, and download your perfectly aligned document.

You can! It’s easy and totally intuitive. Whether you need to highlight key points, leave reminders, or make remarks, all it takes is a few clicks.

Need to add comments to PDF files for review? Add notes, highlights, and markups on any device, then share one clean PDF back.

Want to create bookmarks and navigate your PDF documents—without Adobe? We’ll show you how to do it for free on Mac and Windows.

Write notes on PDF files in minutes. Add comments, highlights, and sticky notes online, then download or share with your team.

Add a table of contents to PDFs to make navigation a breeze, plus learn how to create a glossary, index, and sections for a polished document.

Add fillable fields in PDF in minutes. Create text boxes, checkboxes, and signature areas without extra software. Fast, Free, and no sign-up required.

Create a PDF with drop-down boxes for free on any device. Use LibreOffice to build the form, then Smallpdf to polish and share it.

Easily add checkboxes to PDFs for forms, surveys, or quick checklists for free with Smallpdf—on any device—or with Preview on macOS.

PDFs can be tricky to edit. Here’s how to fix the most common issues in a few easy steps—no IT training needed.

Redact PDF files in a few clicks, not with risky black boxes. Protect sensitive text and images before you share any document—fast and free.

Learn how to watermark PDFs using two free methods: Smallpdf’s online tool and Mac’s Preview tool. Brand and protect your docs with this quick guide.

Use Smallpdf to rearrange PDF pages so that your documents are better organized. Free to use; no registration or download needed.

Learn what PDF/A is and why it’s essential for long-term document archiving. Discover key features, versions, and differences between PDF and PDF/A.