How to convert PDF files: A complete guide to all formats & devices

  • PDF conversion is the process of turning a PDF into another file format or creating a PDF from other files, so documents stay usable across different workflows.
  • The fastest and most flexible option is a secure, cloud-based platform like pdfFiller, which works on any device without installation.
  • You can convert PDFs to Word, Excel, PowerPoint, images, or text, and also create PDFs from other formats, like Microsoft Office files or images.
  • Conversion is browser-based and supported on Windows, Mac, Linux, iOS, and Android devices.
  • If you use pdfFiller during the free trial as your free PDF converter online, there’s no need for download or installation.
  • For business use, always choose secure PDF conversion tools that support GDPR and HIPAA compliance.

Why PDF conversion matters today

PDF is the standard format for sharing documents, but it is not designed for everyday editing. Businesses rely on PDFs to preserve layout and prevent unwanted changes, yet teams still need to update text, extract data, reuse content, and collect signatures.

Contracts, invoices, tax forms, insurance documents, and applications often arrive as PDFs. Without proper conversion tools, employees end up retyping information, copying data manually, or juggling multiple apps, slowing work down and increasing the risk of errors.

PDF conversion solves this problem by making documents flexible without sacrificing consistency. Among comprehensive and up-to-date platforms, pdfFiller supports this entire process in one place, allowing users to convert, edit, eSign, and collaborate on documents directly in the browser while keeping files secure and compliant.

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The three ways to convert a PDF

PDF conversion can be done in several ways. Each approach suits different needs, depending on your requirements for speed, security, and the frequency of document work.

Desktop software

Desktop PDF converters are installed locally and process files offline.

Best for: heavy offline use or large, one-time batch jobs on a single computer
Limitations: device-specific licenses, manual updates, and limited collaboration

Desktop tools often lack cloud workflows and require separate applications for editing, signing, and sharing documents.

Mobile apps

Mobile PDF conversion apps are specifically designed for use on smartphones and tablets.

Best for: quick conversions while traveling or working in the field
Limitations: smaller screens and fewer advanced editing or OCR options

pdfFiller offers mobile apps for both iOS and Android. If you don’t prefer app installations, you can still use a browser-based pdfFiller version available on mobile. 

Online PDF converters (cloud-based)

Online PDF conversion happens directly in a web browser. You upload a file, select a target format, and download or share the converted document.

Best for: fast turnaround, remote teams, and working across devices
Why it works: no software installation, no requirement for updates, no device restrictions

PDF conversion methods comparison

Method Speed Security Feature set Cost
Online PDF converters (cloud-based) Fast, optimized for real-time conversion across devices High when using enterprise-grade platforms with encrypted transmission and ISO-certified infrastructure; suitable for GDPR and HIPAA requirements Full conversion capabilities, cloud storage integration, built-in editing, eSigning, and collaboration in one platform (e.g., pdfFiller) Subscription-based; predictable cost with no per-device licenses
Desktop software Medium; depends on local hardware and file size Local file control but limited centralized security management; compliance depends on internal setup Strong offline conversion, but often requires separate tools for editing, signing, and sharing; limited collaboration Higher upfront cost plus maintenance and upgrade fees, often device-specific licenses
Mobile apps Fast for simple conversions on the go App-level security; fewer enterprise-grade compliance controls Basic conversion features with limited editing and OCR due to mobile constraints Low to medium; often freemium or per-app pricing

As a fully cloud-based platform that supports advanced conversion features, cloud storage integration, built-in editing, and eSigning, pdfFiller stands out from the competition by its comprehensiveness and security. Files are transferred using encrypted connections and stored on ISO-certified servers, making it suitable for businesses that must meet GDPR and HIPAA requirements.

In our video guide, you can see how smooth the PDF file conversion process is:

Converting from PDF: make your content editable

Converting from PDF means exporting content into another format so it can be edited, reused, or analyzed with the basic tools on your computer.

Convert PDF to Word, RTF, or TXT

PDF to Word conversion or conversions to other text formats turn a PDF into a DOC or DOCX file for full editing and collaboration.

  • Convert PDF to Word: for contracts, reports, and legal documents

  • Convert PDF to RTF for wide compatibility across editors

  • Convert PDF to TXT  for plain text or system-friendly content

pdfFiller preserves formatting, fonts, and layout while allowing you to review and adjust the document before sharing.

Convert PDF to Excel

PDF to Excel conversion extracts tables and numerical data into XLS or XLSX files. This is essential for finance, insurance, construction, and operations teams that need to calculate, audit, or update structured data.

Convert PDF to PowerPoint

PDF to PowerPoint conversion transforms static reports or proposals into editable slides. This is especially useful for sales teams, real estate professionals, and managers preparing presentations.

Convert PDF to images (JPG or PNG)

PDF to image conversion converts document pages into image files, which is ideal for visual approvals, website publishing, or social media sharing. pdfFiller enables you to convert PDF files to different image formats.

Converting to PDF: standardize your documents

Converting files to PDF ensures they appear consistently on every device and are ready for sharing or archiving.

Create a PDF from Office files

Word, Excel, and PowerPoint files can be converted into PDFs to lock formatting and create professional, share-ready documents. pdfFiller allows you to convert and then immediately edit, brand, or eSign the file without switching tools. Here’s the guide on how to convert any file format to PDF with pdfFiller.

Create a PDF from images

Image-to-PDF conversion combines one or more JPG or PNG files into a single document. This is commonly used for scanned receipts, IDs, permits, and photo reports. You can easily create a PDF file from images with pdfFiller.

Advanced PDF conversion features

Modern workflows require more than basic file conversion. While working with scanned documents, you may need to recognize text in them and further edit it. 

OCR: convert scanned PDFs into editable files

Optical Character Recognition (OCR) turns scanned images of text into selectable and editable content.

OCR PDF conversion allows you to:

  • Convert scanned PDFs to Word or Excel

  • Search text inside scanned documents

  • Reuse information without manual typing

pdfFiller comes in handy after the OCR is applied, enabling you to convert the output document into the desired formats or make any alterations to it.

Batch conversion

Batch conversion enables you to convert multiple files simultaneously, saving time on large projects or recurring workflows. Depending on the amount of documents in your everyday tasks, you may need it more or less often, but the ability to batch convert may be a valuable differentiation point when you’re choosing the proper software.

Cloud storage integration

Cloud integration allows you to convert PDFs directly from Google Drive, Dropbox, or OneDrive and save results back to the cloud. With pdffiller, the process is straightforward, secure, and accessible from any computer or mobile device with an internet browser.

The best way to convert scanned PDFs

After applying OCR to a scanned document by a dedicated tool of your choice, you can seamlessly convert it with pdfFiller. The quickest way is to upload your file to the dashboard of your pdfFiller account and choose Save as > [your desired format]. You can also open the file and make adjustments to it as needed

How to convert PDFs on any device

PDF conversion on desktop (Mac and Windows)

Native desktop tools are often limited. As a browser-based platform, pdfFiller works seamlessly on both Windows and macOS, eliminating the need for installation and making it easier to switch devices or collaborate with others. In one of our articles, you can read in detail how to convert a PDF on a PC.

PDF conversion on mobile (iPhone and Android)

For PDF conversion on your phone, you can use pdfFiller app for both Android and iOS operating systems. You can also convert PDFs on your phone using a mobile browser, as the browser version of pdfFiller works without requiring an app download, which is useful for secure or shared devices.

PDF conversion in the browser

pdfFiller’s browser-based conversion works in Chrome, Edge, Safari, and Firefox. The platform supports full editing and conversion workflows. Without depending on the type of device or operating system, you can convert PDFs in your browser with ease.

How to convert a PDF online with pdfFiller

Online PDF conversion with pdfFiller follows a simple, consistent workflow:

  1. Upload your PDF from your device or cloud storage

  2. Open the file in the editor if changes are needed

  3. Select Save as and choose the desired format

  4. Download, store, or securely share the converted document

This process supports unlimited conversions on trial and business plans.

A screenshot showing "Save As" file format options including PDF, Word, Excel, PowerPoint, and Image in a document management interface.

pdfFiller’s options to save your document in a chosen format

You can also convert files directly from your dashboard by choosing the Save as option under the three dots near your file, and performing the same flow of actions.

A screenshot of the file options menu in the pdfFiller document management platform, showing actions like Save as, Print, Send, Duplicate, Organize, Tools, and Details.

Access to document saving and a range of features from pdfFiller’s dashboard.

Security, compliance, and trust considerations

pdfFiller’s security follows industry best practices, including encrypted data transmission, role-based access controls, and compliance with GDPR and HIPAA requirements.

For advanced digital signature needs, pdfFiller can be combined with trusted third-party solutions that support eIDAS and the ESIGN Act. This article provides general information and does not constitute legal advice.

Final thoughts

Efficiently converting PDFs is a foundational part of modern business workflows. By using an online PDF converter like pdfFiller, you ensure your documents are accessible, editable, and shareable, without the risk of losing data, formatting, or quality. From HR teams to legal, finance, and operations, seamless document conversion saves time, increases productivity, and supports compliance requirements.

Ready to see how easy conversion can be? 

Start your free pdfFiller trial today and experience unlimited conversions, maximum security, and complete document flexibility: no installation needed.

Glossary

  • PDF (Portable Document Format): A universal file type used for sharing documents while preserving formatting across devices.
  • PDF converter: A software tool for changing PDF files into other file formats, such as Word, Excel, PowerPoint, images, or RTF to PDF conversion.
  • OCR (Optical Character Recognition): Technology that recognizes and extracts text from scanned PDF files or image-based PDFs, making them editable.
  • Word document: A text file created in Microsoft Word or compatible programs, commonly used for business editing and collaboration.
  • File format: The structure in which data is stored and displayed, such as PDF, DOCX, XLSX, JPG, or PPTX.
  • Online PDF converter: A web-based tool, like pdfFiller, that enables users to convert PDF documents without software installation.
  • Converted document: A file generated from an original PDF by changing it to another required format for further editing, sharing, or processing.

FAQ

1. Does PDF conversion reduce document quality?
PDF conversion does not reduce document quality when the tool accurately preserves layout, fonts, and images. When you use pdfFiller, formatting is retained during conversion to formats such as Word or PowerPoint, allowing documents to remain professional and readable.
2. How can I convert a PDF on my phone without installing an app?
You can convert a PDF on your phone by using a mobile browser instead of a dedicated app. pdfFiller works directly in the browser on both iPhone and Android, allowing you to upload, convert, and download files without installing software. This approach is especially useful on shared, managed, or storage-limited devices.
3. Are there file size or conversion limits?
File size and conversion limits depend on the selected plan. pdfFiller offers generous allowances on trials and business plans, making it suitable for large, multi-page documents and frequent conversions.
4. How do I convert a PDF file online for free?
You can try the full functionality of pdfFiller for free during the 30-day trial. Sign up using your email, upload your PDF file, open it in the editor to make any needed changes, and then save it in your desired format.
5. Can I convert a scanned PDF into editable text?
Yes. OCR tools can convert scanned PDFs into editable text, with accuracy depending on scan quality. After conversion, pdfFiller provides versatile editing and document management options for professional use.
6. Is it safe to convert sensitive PDF documents online?
Security is a crucial factor when choosing an online conversion tool. pdfFiller encrypts data communications and stores documents in secure facilities that meet federal compliance standards.
7. How do I convert a PDF without losing formatting?
Use a reliable tool with comprehensive functionality. pdfFiller lets you review the PDF in the editor before conversion to check text, fields, images, and formatting. Once the document is ready, you can convert it while downloading and retain the original formatting.