The Complete PDF Guide: Convert, Compress, Merge, Edit, Sign and Secure PDFs the Right Way (2026)

Introduction: Why PDF Tasks Go Wrong (and How to Get Them Right)

Every day, millions of people run the same small set of PDF searches: pdf to word, jpg to pdf, merge pdf, compress pdf. Most of them find a converter, upload a file, download the result, and only then discover the problem. Tables are scrambled. The scan is blurry. The file is still too big for the upload portal. Or the "redacted" account number can be copied and pasted.

Most PDF tool sites stop at the upload button. They tell you that a tool works, but not why a result looks wrong or which setting fixes it. This guide is written from the working side of document handling. It is built from the problems that come up again and again with real files: contracts, invoices, scanned forms, résumés, visa and university uploads, and print-shop artwork.

You'll learn:

• What a PDF actually is, and why that explains most conversion problems
• Step-by-step instructions for every major PDF task
• Every PDF converter in both directions: Office, images, text and data, web and email, eBooks, design and CAD files
• Exact settings for hitting file-size limits (email, job portals, government forms)
• How to tell a native PDF from a scanned one, and why it matters
• Security, privacy and legal basics that most guides skip (e-signature law, true redaction, file retention)
• Professional formats such as PDF/A, PDF/UA and PDF/X, explained in plain English

Part 1: PDF Fundamentals

What Is a PDF File?

PDF (Portable Document Format) is a file format created by Adobe in 1993. It was designed to make a document look identical on any device, operating system or printer. In 2008 it became an open international standard, ISO 32000-1. The current version, PDF 2.0, is defined in ISO 32000-2.

The key idea is this: a PDF describes where things go on a page, not what they mean. A Word document knows "this is a paragraph, this is a table, this is a heading." A typical PDF only knows "draw these characters at these coordinates, draw a line here, place this image there."

That single fact explains why:

• PDF to Word conversion sometimes breaks layouts, because the converter has to guess the structure
• You can't easily "type into" most PDFs
• Copying text from some PDFs gives jumbled word order

Native vs Scanned PDFs: The Most Important Distinction

Quick test: Open the PDF and try to highlight a single word. If you can select it, the PDF is native. If your cursor draws a box over the whole page, it's a scanned image, and you need OCR (Optical Character Recognition) before you can edit or convert the text.

Anatomy of a PDF (Why Some Files Are Huge)

A PDF can contain:

• Text and vector graphics: tiny in file size, sharp at any zoom
• Raster images: photos and scans, usually 80–95% of a large file's size
• Embedded fonts: full fonts can add hundreds of KB each, while subsets are much smaller
• Metadata: author, software, creation date, sometimes edit history
• Form fields, annotations, attachments, JavaScript, digital signatures
• Layers (optional content), common in CAD and print files

When you know what's inside, you know what to remove to shrink it.

Part 2: Converting Files to PDF

Almost any file can become a PDF. How good the result looks depends on what kind of source you start with. Text-based files (Word, Excel, HTML, CSV) stay sharp and searchable. Image files (JPG, PNG, TIFF) become picture pages, and you need OCR if you want to select their text.

To-PDF Converter Matrix

Office Documents to PDF

Word to PDF

Open the Word to PDF tool →

When you need it: CVs, cover letters, reports, contracts, anything that must look the same for every reader.

Step by step: 1. Upload your .doc or .docx file to the Word to PDF tool. 2. Wait for conversion, which usually takes seconds. 3. Download, then open the PDF and check page breaks, fonts and images.

Common pitfalls: - Font substitution: If you used a font that isn't standard, a server-side converter may swap it. Stick to widely available fonts, or export from Word directly (File → Save As → PDF) when the font is critical. - Track changes and comments: Accept or reject all changes first. Otherwise they may appear in the PDF. - Hyperlinks: Check they still click. Most converters keep them, but some don't.

Excel to PDF

Open the Excel to PDF tool →

• Set the print area first (Page Layout → Print Area) so only the cells you want are included.
• Use Fit All Columns on One Page or landscape orientation for wide sheets. Otherwise one sheet can turn into dozens of pages.
• Choose whether to convert the active sheet or the whole workbook. Hidden sheets are usually skipped.
• Turn on Print Titles so header rows repeat on every page of long tables.

PowerPoint to PDF

Open the PowerPoint to PDF tool →

• Choose one slide per page for sharing, or handouts (2, 3 or 6 slides per page) for printing.
• Animations, transitions, embedded video and audio don't carry over. Each slide becomes its final, fully built state.
• Speaker notes are included only if you choose the "Notes Pages" layout.

OpenDocument (ODT, ODS, ODP) to PDF

Open the ODT to PDF tool →

These are the LibreOffice and OpenOffice equivalents of Word, Excel and PowerPoint, and they behave the same way. LibreOffice's own Export as PDF offers extra options, including PDF/A and tagged (accessible) PDF output.

RTF to PDF

Open the RTF to PDF tool →

RTF (Rich Text Format) is an old, simple format that almost every word processor reads. It converts reliably, but complex layouts, such as text wrapped around images, may shift.

Apple Pages, Numbers and Keynote to PDF

A .pages, .numbers or .key file is really a package of files, and many online converters can't read it fully. The most reliable route is File → Export To → PDF inside the Apple app, including on iPhone and iPad. If you're on Windows, open the file at iCloud.com and export it there.

Text, Data and Code to PDF

Open the TXT to PDF tool →

• TXT to PDF: Choose a readable font and page size. For code or logs, use a monospaced font so columns line up.
• CSV to PDF: A CSV becomes a table. Wide data needs landscape pages or a smaller font. For anything you need to edit later, convert the CSV to Excel instead and keep the PDF only as a snapshot.
• Markdown to PDF: Headings, lists and code blocks convert well. Tables and images depend on the converter, so check the output.
• XML to PDF: Raw XML converts as tags and text. To get a readable document, the XML needs a stylesheet (XSL-FO), which is how many e-invoicing systems create PDFs.

Web Pages and Email to PDF

HTML and Website URL to PDF

Open the HTML to PDF tool →

When you need it: Saving online receipts, order confirmations, articles or web content for records.

• Scroll the full page first if you print from a browser. Many sites load images only as you scroll ("lazy loading"), so unloaded images appear as blank boxes.
• Close cookie banners and pop-ups before converting, or they'll be printed on every page.
• Content behind a login can only be converted from your own browser, using Print → Save as PDF. An online URL converter can't see pages you're signed into.
• Turn on Background graphics in browser print settings if colours or shaded boxes matter.

Email (EML, MSG) to PDF

Open the Email to PDF tool →

Converting emails to PDF is common for legal disputes, HR files and accounting records. - The PDF should show the sender, recipients, date and subject. Check these appear, because they're often the evidence that matters. - Attachments usually convert separately. Convert them, then merge them after the email in one PDF. - For a long thread, convert the latest email, which normally quotes earlier ones, and check nothing is cut off.

Images to PDF

JPG to PDF (and PNG, HEIC, WEBP, GIF, BMP)

Open the JPG to PDF tool →

When you need it: Combining phone photos of receipts, ID documents, homework or signed pages into one file.

Step by step: 1. Upload one or more images. 2. Drag them into the correct order. 3. Choose page size (A4 for the UK and most of the world, Letter for the US), orientation and margins. 4. Convert and download.

Getting a professional result: - Photograph documents in daylight, flat on a dark contrasting surface, with the camera parallel to the page. - Crop to the page edges before converting. Shadows and table edges make documents look unprofessional and add file size. - iPhone photos are often HEIC. Make sure the tool supports it, or change the camera setting to "Most Compatible" (JPG). - PNG is best for screenshots and diagrams. WEBP comes from websites. GIF keeps only the first frame. BMP files are huge, so compress the PDF afterwards.

TIFF to PDF

Open the TIFF to PDF tool →

TIFF is common for scanners, fax systems and archives. A multi-page TIFF becomes a multi-page PDF. TIFFs saved with lossless compression can be very large, so compress the resulting PDF if you need to email it.

SVG to PDF

Open the SVG to PDF tool →

SVG is a vector format, so it stays perfectly sharp in a PDF at any size. That makes it ideal for logos and charts. If the SVG uses web fonts, convert the text to outlines first, or the font may be replaced.

eBooks to PDF

• EPUB to PDF: EPUB text "reflows" to fit any screen. A PDF has fixed pages, so the converter must choose a page size and break the text into pages. Pick a page size that suits how the PDF will be read: A5 or 6×9 inches for reading, A4 or Letter for printing.
• MOBI / AZW3 to PDF: These are Kindle formats. Books bought from Amazon and other stores are usually DRM-protected, and removing DRM may breach the licence terms and, in some countries, the law. Only convert DRM-free books, such as your own manuscripts or public-domain titles.

Design, Print and Engineering Files to PDF

Photoshop (PSD), Illustrator (AI), EPS and PostScript to PDF

Open the EPS to PDF tool →

• PSD: Layers are flattened into one image. Keep the PSD as your editable master.
• AI and EPS: Usually stay vector. EPS and PostScript (.ps) are close relatives of PDF and convert very reliably.
• For print shops: Ask which standard they want, usually PDF/X-1a or PDF/X-4, and include bleed (typically 3 mm or 0.125 inches) and crop marks.

AutoCAD (DWG, DXF) to PDF

Open the DWG to PDF tool →

• Convert from a layout (paper space) at a fixed scale, such as 1:100, not from model space. Otherwise the drawing won't measure correctly.
• Check line weights. Some converters make all lines the same thickness, which makes plans hard to read.
• Choose whether to keep layers, so the recipient can toggle them in a PDF viewer.
• Use PDF/E if the drawings are for long-term engineering records.

Legacy Formats to PDF

Open the XPS to PDF tool →

• XPS / OXPS to PDF: XPS is Microsoft's old alternative to PDF, created by "Microsoft XPS Document Writer". Few people can open XPS files today, so convert them to PDF before sharing.
• DjVu to PDF: DjVu is used for scanned books and old archives. It converts to an image-based PDF. Run OCR if the DjVu file has no text layer.

Part 3: Converting PDFs to Other Formats

Converting out of a PDF is harder than converting into one, because the converter has to rebuild structure (paragraphs, tables, slides) from positioned text and graphics. Native PDFs give the best results. Scanned PDFs always need OCR first.

From-PDF Converter Matrix

PDF to Office Formats

PDF to Word

Open the PDF to Word tool →

This is the single most searched PDF task, and the most misunderstood.

Step by step: 1. Upload the PDF. 2. If it's scanned, enable OCR and choose the document language. 3. Convert and download the .docx. 4. Review headings, tables and lists before editing.

Why formatting breaks, and fixes:

PDF to Excel

Open the PDF to Excel tool →

Works best on native PDFs with clearly ruled tables, such as bank statements and invoices.

Pro tips: - After converting, check number formats. "1,234.56" may come through as text. Use Excel's Text to Columns or VALUE() to fix it. - Watch for merged header cells and totals rows that shift columns. - For bank statements spanning many pages, check that repeated headers on each page didn't become data rows. - Check dates. A UK date like 03/11/2026 can be read as 11 March in a US-format spreadsheet. Set the column's date format to match the source.

PDF to CSV

Open the PDF to CSV tool →

Choose CSV over Excel when the data is going into accounting software, a CRM or a database. CSV keeps only values, with no formatting, formulas or multiple sheets. Each table usually becomes a separate CSV file, or rows are combined into one, so check how the tool handles multi-page tables.

PDF to PowerPoint

Open the PDF to PowerPoint tool →

Useful for reusing slides from a shared deck. Each PDF page becomes one slide. Expect text, shapes and images to become separate boxes rather than master layouts, and charts usually arrive as pictures rather than editable charts.

PDF to OpenDocument (ODT, ODS, ODP) and RTF

Open the PDF to ODT tool →

These work the same way as the Word, Excel and PowerPoint conversions. Choose RTF only if the receiving software is old or very simple, because RTF can't hold complex layouts.

PDF to Google Docs

Upload the PDF to Google Drive, right-click it and choose Open with → Google Docs. Google runs OCR automatically, which makes it handy for quick edits. Layout is heavily simplified, and images and tables are often lost, so convert to Word first if formatting matters.

PDF to Text, Web and Data Formats

Open the PDF to Text tool →

• PDF to TXT: The cleanest way to get text into another system, with no formatting. Multi-column layouts may mix the columns' lines together.
• PDF to HTML: Turns a PDF into a web page. Exact-layout mode looks like the original but is hard to edit. Flowing mode is cleaner, works better on phones and is better for SEO. For websites, flowing mode is usually the better choice.
• PDF to Markdown: Keeps headings, lists and tables as lightweight text. It's increasingly used to feed documents into AI tools, knowledge bases and documentation sites.
• PDF to XML / JSON: Used for automation, such as pulling invoice numbers, totals and dates into accounting systems. Results depend heavily on consistent layouts, so test with several sample documents first.

PDF to Image Formats

PDF to JPG / PNG

Open the PDF to JPG tool →

When you need it: Sharing a page on social media, adding a page to a presentation, or uploading where only images are accepted.

• JPG is smaller, best for photos.
• PNG is sharper for text, line art and screenshots, but larger.
• Choose 150 DPI for screens and 300 DPI for print.
• Choose between "convert each page to an image" and "extract images embedded in the PDF". These are different tasks.

PDF to TIFF, WEBP, GIF and BMP

Open the PDF to TIFF tool →

• TIFF: For archives, fax systems and some print workflows. It can hold all pages in one multi-page file.
• WEBP: Smaller than JPG and PNG at similar quality, so it's ideal for putting PDF pages on a website.
• GIF and BMP: Only needed for older systems that demand them. GIF is limited to 256 colours, so photos look grainy.

PDF to SVG

Open the PDF to SVG tool →

Vector PDF pages, such as charts, logos and drawings, convert to SVG and stay editable in Illustrator, Inkscape or Figma. Scanned pages can only be embedded as pictures inside the SVG.

PDF to eBook Formats (EPUB, MOBI)

Open the PDF to EPUB tool →

• PDF to EPUB works well for text-heavy books and reports. The text reflows to fit the reader's screen.
• It works poorly for magazines, textbooks with sidebars, and complex layouts. Page headers, footers and page numbers can end up mixed into the text.
• Check the table of contents, footnotes and images after converting.
• Most current Kindle apps and devices accept EPUB through Amazon's Send to Kindle service, so you often don't need MOBI.

PDF to Design and Engineering Formats

• PDF to EPS: For older print and design software that expects EPS. Vector content stays vector.
• PDF to DWG / DXF: Only works properly for vector PDFs exported from CAD software. Lines, arcs and text become editable CAD objects, but check the scale against a known dimension. A scanned drawing produces only an image, and redrawing or specialist raster-to-vector software is needed.

PDF to PDF/A (and Back)

Open the PDF to PDF/A tool →

• PDF to PDF/A prepares a file for long-term archiving. It embeds fonts and removes features that might stop working in future, such as JavaScript and external links (see Part 10).
• PDF/A to standard PDF is sometimes needed when you must add a password or interactive features, which PDF/A doesn't allow. Keep the original PDF/A as your archive copy.

Which Output Format Should I Choose?

Part 4: Organising PDFs

Merge (Combine) PDFs

Open the Merge PDF tool →

Step by step: 1. Upload all files. Many tools also accept Word and images and convert them first. 2. Drag them into the correct order. 3. Merge and download.

Pro tips: - Rename files with numbers first (01-cover.pdf, 02-form.pdf) so they upload in order. - Merging flattens nothing by itself. Fillable form fields with the same name in two documents can conflict, so one field fills both. Flatten forms before merging if they share field names. - Bookmarks from source files may be lost, so check if you need a navigable document.

Split PDF

Open the Split PDF tool →

Use this to extract specific pages, split every page into its own file, or divide by page ranges, for example 1-3, 7, 10-12.

Common scenario: A 40-page scanned bundle that contains five separate invoices. Split it by range into five files, then name each one by invoice number.

Rotate, Reorder, Delete and Add Pages

Open the Rotate PDF tool →

• Rotate sideways scans, and make sure the tool saves the rotation permanently rather than only changing the view.
• Delete blank pages that scanners insert from double-sided feeds.
• Add page numbers for legal bundles and court submissions. UK court bundles typically require consistent pagination, so check the specific court's practice direction.

Part 5: Compress PDF (Hitting Exact Size Limits)

Compression is where most competitor pages are thinnest. They offer "low/medium/high" without telling you what each does, or how to reach a specific limit.

How Compression Actually Works

1. Image downsampling: Reducing image resolution (for example from 600 DPI to 150 DPI). This gives the biggest savings.
2. Image recompression: Applying stronger JPEG compression.
3. Font subsetting: Keeping only the characters actually used.
4. Removing extras: Metadata, thumbnails, duplicate objects, unused resources.

A text-only PDF exported from Word is already small. Compression may save almost nothing. A phone-scanned PDF can often shrink by 70–90%.

Common Upload Limits

Limits change, so always confirm the current limit stated on the portal you're uploading to.

How to Reach a Target Size (e.g. "Under 200 KB")

Open the Compress PDF tool →

1. Start with recommended compression and check the result.
2. If it's still too big, use strong compression.
3. Still too big? Convert to grayscale, since colour scans are roughly three times larger.
4. Remove pages that aren't required.
5. As a last resort, rescan at 150 DPI in grayscale instead of 300–600 DPI colour.

Part 6: Editing PDFs

What "Edit PDF" Really Means

Filling PDF Forms

Open the Edit PDF tool →

• Fillable forms have interactive fields. Click and type.
• Flat forms don't. Use a "type anywhere" text tool and align carefully.
• Before submitting, flatten the form so entries can't be changed and display correctly in every viewer.

Annotate and Review

Highlight, underline, sticky notes and drawing tools are ideal for reviewing contracts, marking up drawings or grading assignments. Remember that comments travel with the file. Remove internal review notes before sending externally.

Part 7: Sign PDFs (and Whether It's Legally Valid)

Electronic vs Digital Signatures

Is an Electronic Signature Legal?

• United States: The federal ESIGN Act (2000) and the Uniform Electronic Transactions Act (UETA), adopted by most states, generally give electronic signatures the same legal effect as handwritten ones.
• United Kingdom: Electronic signatures are recognised under the Electronic Communications Act 2000 and UK eIDAS. The Law Commission's 2019 report confirmed they can generally be used to execute documents.

Exceptions exist. Wills, certain property deeds and some court or family-law documents may require wet ink, witnesses or specific formalities. This is general information, not legal advice. For high-stakes documents, check with a solicitor or attorney.

Signing Step by Step

Open the Sign PDF tool →

1. Upload the PDF and open the Sign tool.
2. Create your signature: type, draw or upload a clean image on a white background.
3. Place it, plus initials and date where required.
4. Apply and download, then flatten so it can't be dragged or removed.

Part 8: PDF Security and Privacy

This is the biggest gap in competitor content, and the area where mistakes are most costly.

Password Protection: Two Different Passwords

Open the Protect PDF tool →

• Open (user) password: Required to view the file. This provides real encryption.
• Permissions (owner) password: Restricts printing, copying or editing. This is weak, because many tools ignore it, so don't rely on it for confidentiality.

Use AES-256 encryption where available. Older 40-bit RC4 encryption in legacy PDFs is easily broken.

Unlock PDF

Open the Unlock PDF tool →

Removing a password should only be done on files you own or are authorised to access, for example a bank statement you've received with a known password that you want to archive without it. Reputable tools require you to enter the known password for encrypted files.

Redaction: The Mistake That Makes Headlines

Open the Redact PDF tool →

Drawing a black box over text does not remove the text. It stays in the file underneath and can be copied, searched or extracted. This has caused public data leaks, including court filings where "blacked-out" passages were revealed simply by copying and pasting.

Proper redaction: 1. Use a true Redact tool that deletes the underlying text and image data. 2. Search the document for every instance of names, numbers and addresses. 3. Remove metadata and hidden content (comments, attachments, earlier versions). 4. Test it: Open the redacted file, press Ctrl/Cmd+A, copy, and paste into a text editor. Nothing sensitive should appear.

Remove Metadata

Open the Remove PDF metadata tool →

PDFs can reveal the author's name, company, software, file paths and edit dates. Clean metadata before publishing documents publicly or sending them to opposing parties.

Is It Safe to Upload PDFs to Online Tools?

Ask these questions of any online PDF service, including ours:

• Encryption in transit: Is the site HTTPS (TLS)?
• Retention: How long are files stored? Are they deleted automatically, and when?
• Access: Do staff or third parties ever view files?
• AI training: Are uploaded documents used to train models?
• Location and law: Where are servers, and does the policy reference UK GDPR / GDPR or CCPA?

For highly sensitive files (medical records, passports, legal privilege, unreleased financials), use offline or on-device software, or confirm the service's policy meets your organisation's requirements.

Part 9: OCR (Make Scanned PDFs Searchable and Editable)

How OCR Works

OCR analyses the image of each page, identifies letter shapes, and adds an invisible text layer. The page looks the same, but you can now search, select and copy text.

Getting Accurate OCR

Open the OCR PDF tool →

Part 10: Professional PDF Standards (What Competitors Don't Explain)

Accessible PDFs (A Legal Issue, Not Just a Nicety)

In the US, the ADA and Section 508 apply accessibility requirements to many organisations' documents. In the UK, the Public Sector Bodies Accessibility Regulations 2018 cover public-sector websites and documents, and the Equality Act 2010 applies more broadly.

An accessible PDF has: - Tags that define headings, lists, tables and reading order - Alt text for meaningful images - A document title and language set in properties - Real text, not scanned images (OCR first if needed) - Sufficient colour contrast

Easiest route: Build accessibility into the source. Use Word's heading styles and alt text, then export to PDF with "document structure tags" enabled. Fixing an untagged PDF afterwards is far harder.

Part 11: AI and PDFs

"Chat with PDF" and AI summary tools are a fast-growing category. They're useful for: - Summarising long reports, research papers or contracts - Finding specific clauses or figures - Generating study questions from lecture notes

Use them carefully: - AI can misstate figures or invent details. Always verify answers against the page cited. - Check whether uploaded documents are retained or used for training before uploading confidential material. - AI quality depends on extractable text, so scanned PDFs need OCR first.

Part 12: Device-Specific Workflows

Windows

• Print to PDF: Built-in "Microsoft Print to PDF" printer from any app.
• View and annotate: Microsoft Edge opens PDFs and supports highlighting, drawing and form filling.

Mac

• Preview can merge (drag thumbnails between files), rotate, sign, annotate and reduce file size through the Quartz "Reduce File Size" filter. That filter can be very aggressive, so check readability.

iPhone and iPad

• Files app: Scan documents (tap ••• → Scan Documents), mark up and create PDFs.
• Share → Print → pinch outwards on the preview creates a PDF from almost anything.

Android

• Google Drive includes a document scanner that saves PDFs.
• Print any screen to PDF via Share → Print → Save as PDF.

Chromebook

• Print → Save as PDF destination. Use online tools for merging and conversion.

Part 13: Real-World Scenarios and Recipes

Scenario 1: Visa or university application, "each file must be under 300 KB." Scan at 150–200 DPI in grayscale, convert JPG to PDF, compress with strong settings, then zoom to check that text is readable.

Scenario 2: Monthly expense claim with 15 receipt photos. JPG to PDF with all photos in order, then compress (recommended), then add page numbers. Name it 2026-11_Expenses_YourName.pdf.

Scenario 3: Client sent a scanned contract you need to amend. OCR, then PDF to Word. Proofread figures, make edits, export to PDF, then send for e-signature.

Scenario 4: Publishing a policy document on your website. Write in Word with heading styles and alt text, then export as a tagged PDF. Remove metadata, set the document title, and run an accessibility check.

Scenario 5: Sharing a statement with a landlord or lender. Redact your account number properly (true redaction), test with copy and paste, then password-protect and send the password separately.

Quick Reference: Which Tool Do I Need?

Frequently Asked Questions

Is PDFWisely free? [Insert your accurate pricing and limits here: free tier, daily task limits, maximum file size.]

Will converting a PDF to Word keep my formatting? Simple documents usually convert very closely. Complex layouts, multi-column designs and scanned pages may need some adjustment. Scanned PDFs require OCR.

Why is my PDF so large? Almost always because of high-resolution images or scans. Compressing, converting to grayscale or rescanning at 150–200 DPI will reduce it dramatically.

How do I make a PDF smaller without losing quality? Use recommended (medium) compression first. It reduces image resolution to screen-appropriate levels, and text stays sharp because it's vector-based.

Can I edit a scanned PDF? Yes, after OCR adds a text layer. Then convert to Word or use the editor's text tools.

Are electronic signatures legally binding in the US and UK? Generally yes, under the ESIGN Act and UETA in the US and the Electronic Communications Act 2000 and UK eIDAS in the UK. Some documents, such as wills, have exceptions.

Is drawing a black box over text a safe way to hide it? No. The text remains underneath. Use a dedicated redaction tool and test by copying and pasting.

What's the difference between PDF and PDF/A? PDF/A is an archival version that embeds all fonts and forbids features like encryption and external links, so the file stays readable for decades.

How long do you keep my files? [Insert your exact retention policy, e.g. "Files are automatically deleted after X hours."]

Which file formats can I convert to and from PDF? Office files (Word, Excel, PowerPoint, OpenDocument, RTF), images (JPG, PNG, HEIC, WEBP, GIF, BMP, TIFF, SVG), text and data (TXT, CSV, Markdown, HTML, XML), email, eBooks (EPUB, MOBI), and design and CAD files (PSD, AI, EPS, DWG, DXF). See the converter matrices in Parts 2 and 3.

Is it better to convert a PDF to JPG or PNG? Use PNG for pages that are mostly text, diagrams or screenshots, because it keeps edges sharp. Use JPG for photo-heavy pages, because the files are much smaller.

Can I convert a Kindle book I bought to PDF? Usually not. Purchased Kindle books are DRM-protected, and removing DRM may breach the licence terms and, in some countries, the law. You can convert DRM-free eBooks, such as your own manuscripts or public-domain titles.

Can I convert a PDF to an editable AutoCAD drawing? Yes, if the PDF was exported from CAD software and contains vector lines. A scanned drawing converts only to an image inside the CAD file. Always check the scale against a known dimension.

Can I convert PDFs on my phone? Yes. PDFWisely works in mobile browsers, and iOS and Android also have built-in scan and "save as PDF" features.

Conclusion and Next Steps

PDFs are reliable for sharing but tricky to change, because they store page appearance, not document structure. Once you understand the difference between native and scanned files, what makes a PDF large, and the difference between hiding and removing information, most PDF problems become easy to solve.

Your next steps: 1. Identify your file type: Try selecting text to see if it's native or scanned. 2. Pick the right tool from the quick reference table above. 3. Check the output: formatting after conversion, readability after compression, and copy-paste after redaction. 4. Protect sensitive files with AES-256 passwords sent separately, and true redaction. 5. Bookmark PDFWisely for converting, compressing, merging, editing and signing in one place.

About the author: Dr. AK writes PDFWisely's guides on document conversion, PDF standards and file security. [Add qualifications and experience.] Last reviewed: November 2026. Standards and legal references checked against ISO and official government sources.