Blog
News, tutorials and notes on viewing documents in the browser.
How to Quickly View MSG Files in the Browser – No Install Required
Learn to open .msg files instantly in any browser for free and see how developers can embed the same preview using Doconut SDK.
How to Convert DWG to PDF (or Skip It) with a Browser‑Based Viewer
Learn how developers can konvertera dwg till pdf, plik dwg na pdf, or even avoid conversion by embedding a secure DWG preview with Online Document Viewer.
Build a Self‑Hosted Document Viewer in .NET – Step‑by‑Step Guide
Learn how to embed a fast, secure, self‑hosted document viewer in a .NET app using the Doconut SDK and deliver PDF, Office, CAD previews without external services.
How OnlineDocumentViewer Leverages Doconut SDK for In‑Browser Document Rendering
Discover how OnlineDocumentViewer uses Doconut SDK to render 50+ file types in the browser with pixel‑perfect fidelity, zero plugins, and built‑in security.
Bring CAD Drawings into Your .NET Project Portal
Use Doconut SDK to preview DWG and DXF drawings in a .NET project portal, with practical guidance on layouts, rendering quality, and review workflows.
Preview MSG and EML Files Inside Your CRM with Doconut SDK
Add MSG and EML email previews to your .NET CRM with Doconut SDK, keeping archived messages close to customer records and support cases.
Comparing Free Online PDF Readers: Features, Privacy, and Performance
Compare online PDF readers with Doconut using a repeatable checklist for features, privacy, performance, integration, accessibility, and cost.
Tutorial: Control Print Access with Doconut
Plan Doconut print access with official product resources, application-owned permissions, protected operations, clear UX, and practical tests.
How to Add Doconut to a Security-Conscious .NET Application
Integrate Doconut with server-side authorization, controlled storage, retention rules, browser policy, and meaningful security tests.
Embedding Doconut in Your Web Application: A Practical Guide
Plan a Doconut viewer integration using official setup resources, application-owned authorization, accessible controls, and reliable error handling.
Designing a View-Only Document Workflow with Doconut
Learn how to design a view-only document workflow in ASP.NET using server-side authorization, controlled storage, auditing, and documented Doconut viewer settings.
Plugin-Free Document Viewing in ASP.NET Applications
Learn how .NET teams can add embedded PDF, Office, CAD, email, and image viewing without depending on legacy client-side plugins.
Mobile-Optimized Document Viewing: A Responsive Design Guide
Learn how .NET teams can design a responsive, touch-friendly document viewing experience around the Doconut SDK without sacrificing usability, performance, or access control.
How to Embed PDF, Office, CAD, and Image Viewing in a .NET Web App
A step-by-step guide to planning secure, embedded document viewing for PDF, Office, CAD, email, and image files with the Doconut .NET SDK.
Batch PDF Conversion in the Cloud: Tips and Limitations
Learn how to queue batch PDF conversions, store results securely, and add document previews to Windows-based .NET applications with the Doconut SDK.
Embedded Document Rendering for .NET Applications
How .NET teams add multi-format document preview to a web application: where files are processed, what actually affects speed, and which product does what.
How to Protect Sensitive Documents When Using Online PDF Viewers
Protect sensitive documents when using online PDF viewers. Learn security best practices for file preview, access control, storage, and .NET application integration.
Top 5 Security Myths About Online PDF Viewers and Conversion Tools
Learn the top security myths about online PDF viewers and conversion tools. Understand file handling, access control, storage, and when to consider a .NET document viewer SDK.
Desktop PDF Converter vs Browser-Based Document Viewer: Which Should You Choose?
Compare desktop PDF converters with browser-based document viewers for document preview, multi-format support, maintenance, and .NET application integration.
The Hidden Costs of Free PDF Services: Ads, Limits, and Data Usage
Learn how hidden ads, file-size limits, and privacy risks of free PDF services can hurt SaaS applications, and why a secure PDF viewer for .NET-friendly workflows provides a better document preview experience.
Handling Large PDFs: Tips for Faster Conversion and Compression
Learn how front-end developers can improve large PDF handling with a secure viewer, API integration, and .NET-friendly workflows.
Security Considerations When Uploading Sensitive Documents to Online Converters
The risks of uploading confidential files to online converters, and where a free public viewer ends and an embedded .NET SDK begins.
Why Desktop PDF Viewers Still Matter in a World of Free Online Tools
Where a desktop PDF viewer still wins, where a free browser viewer is enough, and which of the two a .NET team should embed. Limits and gaps stated outright.
How to Securely Unlock and Protect PDFs Without Compromising Data
How PDF passwords, permissions and signatures work, what a browser viewer can safely do with a protected file, and what it cannot do at all.
Paid PDF Editors vs. Free Online Tools: Which Delivers Better Value?
When a paid PDF editor is worth it, when a free browser viewer is enough, and exactly what this site does and does not do.
Maintaining Image Quality While Compressing PDFs
Why PDF images go blurry when you compress them, which settings to change, and how to check the result at full zoom before you send the file.
When free online PDF converters aren’t safe: data‑privacy risks explained and why an online document viewer matters
The privacy risks of free PDF converters, and what a hosted viewer can honestly promise instead: HTTPS, no account, published limits, nothing kept.
Batch Processing PDFs Online: Tips and Tool Comparisons
What batch PDF processing really needs, how the categories of free online tool compare, and where a single-file browser viewer and converter fits in.
The Hidden Costs of Free Document Viewers and How to Eliminate Them
Discover the hidden costs of free document viewers—data exposure, performance hits, compliance risks—and learn how a privacy‑first solution eliminates them.
The True Cost of 256‑Bit SSL and What Security Certifications Really Mean for Document Privacy
Explore the true cost of 256‑bit SSL, the limits of security certifications, and how a privacy‑first document viewer ensures real document protection.
On-Premise vs Cloud Document Viewing: Which Solution Is Right for Your Enterprise?
Explore on‑premise vs cloud document viewers for enterprises, comparing security, scalability, cost and user experience to help choose the right solution.
Embedding a Secure Document Viewer: 7 Essential Features Front‑End Developers Often Miss
Learn the 7 must‑have security features—encryption, CSP, sandboxed iframes, token auth, watermarks, audit logs, and more—for safe document viewer embeds.
The Need for Speed: Fast Document Rendering Online
Why speed matters in document viewing. How to achieve instant rendering for large files online without sacrificing quality. Powered by Doconut.
Doconut: The Superior Alternative for .NET Document Viewing
Why Doconut is the best alternative to legacy viewers and expensive managed solutions. A deep dive into features, performance, and control.
View CAD Files Online in Your Browser: No AutoCAD Required
Discover how to view complex CAD drawings (DWG, DXF, DGN) directly in your web browser without installing AutoCAD. Powered by Doconut.
Four Hidden Costs of a Free Document Viewer
The four hidden costs of a free document viewer — exposure, throttling, lock-in, missing controls — and exactly what a genuinely free viewer covers.
Secure Document Sharing Online: Why Email Attachments Are a Security Risk
Why an email attachment loses you control of a document, what a browser viewer changes, and — plainly — what a free hosted viewer does not give you.
How Online Document Viewers Reduce Licensing Costs
Explore the significant cost savings and ROI achievable by replacing expensive desktop software with a versatile online document viewer. Powered by Doconut.
The Ultimate Universal File Viewer for Enterprise: Enhancing Productivity and Compliance
Discover how a universal file viewer can transform enterprise document management by ensuring compatibility, security, and efficiency across all departments. Powered by Doconut.
Browser-Based Viewing vs. Desktop Apps: The Efficiency Battle
Is it time to ditch desktop software? We break down the efficiency battle between browser-based document viewers and traditional desktop applications.
Beyond PDF: Exploring Advanced Formats with Doconut
CAD drawings and email archives open free in the browser. DICOM does not: it is a separately licensed plugin for the .NET SDK. Where the line falls, and why.
Starting the Year Secure: Best Practices for Document Security
Start 2026 by tightening document security: access control, encryption, audits, watermarking, and where a hosted viewer stops being the right tool.
Top 5 Document Management Trends to Watch in 2026
As we step into 2026, stay ahead of the curve with these top document management trends shaping the future of business workflows.
Experience the Ultimate Universal Document Viewer
View PDF, CAD, Office and email files in the browser, free and with no account — and license the same .NET rendering engine for your own app with Doconut.
Preview PDFs and Office Files on Any Device — No Software Needed
View PDFs, Word, Excel, PowerPoint and more instantly in any browser—no downloads, plugins, or software installation, with secure server‑side rendering.
Instant Document Viewing in Your Browser - Powered by Doconut
OnlineDocumentViewer offers instant, secure in-browser document previews for Word, PDF, Excel, PowerPoint and more, powered by Doconut’s .NET 6 rendering engine.
Why OnlineDocumentViewer Is the Best Browser-Based Viewer for Excel Files
Open XLS, XLSX, CSV, ODS, XLSM, XLSB, XLTX and XLTM in a browser, up to 20 MB. No Excel, no account, deleted after viewing.
Multi-Format Document Viewer for Teams
Your team receives PDF, DOCX, XLSX, DWG, MSG and PSD. One browser viewer opens 70+ extensions, with no install, no account and a size limit set per format.
Discover the Free Online Viewer That Opens PDF, Office & CAD Files Instantly
Instant, secure, cross‑platform viewing with OnlineDocumentViewer – free, browser‑based access for PDFs, CAD, images and more.
View Images, Office Files, Emails and eBooks Online for Free with OnlineDocumentViewer
Easily preview images, Office files, emails, eBooks and many other formats with OnlineDocumentViewer. No installation, no accounts, and no downloads required.
Multi-Format Viewing with OnlineDocumentViewer
OnlineDocumentViewer provides instant, free, zero‑install viewing of PDFs, Word, Excel, CAD, PSD and 70+ formats directly in any browser.
Open PDF, Word, CAD & More Instantly—No Installation Required
A free browser viewer for PDF, Office, CAD and PSD: 70+ extensions, no sign-up, files deleted after viewing. What it opens and what it does not.
Open 70+ File Types in Your Browser—No Plugins, No Downloads
Free OnlineDocumentViewer lets you view PDFs, CAD, Office files & more instantly in any browser—fast, secure, no install.
Open 70+ File Types Online for Free with OnlineDocumentViewer
Open 70+ file types in any browser — no download, no signup, a size limit per format, and the file deleted when you close it.
Boost Productivity with Online Document Viewer
A free browser viewer for 70+ formats: no account, per-format size limits, and the file deleted with the session. What it does, and what it deliberately does not.
Work Smarter Anywhere with Online Document Viewer
Boost remote productivity with Online Document Viewer – secure, fast, browser‑based access to PDFs, Office, CAD and more on any device.
Team Files: What a Free Viewer Solves, and What It Does Not
What a free browser viewer does for a team — 70+ formats, no licence, nothing stored — and the sharing, comments and versioning it does not have.
Streamline Your Workflow with Online Document Viewer
Preview PDFs, Office files and CAD drawings in your browser. 70+ extensions, no account, deleted after viewing. What it does, and what it does not.
Sharing a Document With Someone Who Cannot Open It
A free browser viewer for 70+ extensions with a size limit per format and no account — plus what "collaboration" does and does not mean here.
Maximize Your Efficiency with the Free Online Document Viewer
The free online document viewer, feature by feature: 70+ extensions, no account, files deleted after viewing — and the things it does not do.
The Free Viewer, Feature by Feature (Including What It Lacks)
The free viewer feature by feature: 70+ formats, a size limit per format, reading tools, nothing stored — and the features it deliberately lacks.
Enhance Your Document Viewing Experience with Online Document Viewer
70+ formats in a browser tab, per-format size limits, nothing stored, no account — and no editing, annotation or sharing. What the viewer does exactly.
Transform Your Document Workflow with Online Document Viewer
Multi-format viewing in the browser: 70+ extensions, a size ceiling per format, no account, deleted after viewing. Plus the list of what it will not do.
Enhanced Security Features of Online Document Viewer: A Deep Dive
How the free viewer handles your file: HTTPS in transit, server-side rendering, deletion with the session — and the accounts, audit trail and certifications it has not got.
Maximize Your Productivity with the Online Document Viewer: A User's Guide
Boost productivity with the Online Document Viewer—view PDFs, Word, Excel, PowerPoint, CAD and more instantly in any browser, no installation needed.
Free Online Document Viewer: Formats, Limits and Features
The free online document viewer in detail: which formats open, the size limit for each, what the reading tools cover, and what the site deliberately lacks.
What the Free Online Document Viewer Does, and Does Not
Plugin-free document viewing for 70+ extensions, with a size limit per format and the file deleted after viewing. Plus a plain list of what it will not do.
The Benefits of Cloud-Based Document Viewing for Modern Businesses
What cloud-based document viewing actually covers: 70+ formats in a browser tab, per-format size limits, no install, and nothing kept after the tab closes.
How Online Document Viewers Improve Remote Work Efficiency
How a free browser viewer helps distributed teams: 70+ formats, no install, no account, nothing stored — and the collaboration features it does not have.
Why Cloud-Based Document Viewing is the Future of Work
What a browser-based document viewer actually replaces, and what it does not: 70+ extensions, a size limit per format, no accounts and no storage.
RTF Viewer Online: Open Rich Text Files in a Browser
Open RTF documents in any browser. Up to 15 MB, no Word, no account, deleted after viewing — plus the one thing that will not match the sender's screen.
Discover the Power of Viewing CSV Files Online
Open a CSV in the browser with no spreadsheet software: rows render as a table, up to 20 MB, and the file is deleted after viewing.
Explore TIFF Files Online — High-Resolution Image Viewing with Zero Setup
Open multi-page, high-resolution TIFF and TIF files in any browser, up to 25 MB. No software, zoom and print, and the file deleted after viewing.
View DWG Files Online – Instantly Open AutoCAD Drawings in Your Browser
Open AutoCAD DWG drawings instantly in any browser with Online Document Viewer—secure, fast, true‑vector rendering, no software download required.
Experience Lightning-Fast PDF Viewing with Online Document Viewer
How image-heavy PDFs open here: server-side rendering, first page first, 25 MB per file, deleted after viewing. No OCR on scans.
Open ODT, Word, Excel and PowerPoint Files Online, Free
View Word, ODT, Excel, PowerPoint and email files instantly online with OnlineDocumentViewer.com—no downloads, secure, cross‑platform, and free.
Open ODT Files Online – The Best Way to View OpenDocument Text Files
View ODT files instantly online with no software—secure, fast, and fully formatted. Perfect for students, businesses, and governments.
How to Open ODS Files Online Without Installing Any Software
Open ODS spreadsheets in the browser, up to 20 MB, with every sheet, charts and formula results. No install, no account, deleted after viewing.
Your Ultimate Online Document Viewer for PowerPoint
Open PPT, PPTX, ODP and six more presentation formats in any browser, up to 20 MB. No software, no account — and what a rendered slide leaves out.
Exploring Creative Content: View High-Resolution Images and Portfolios Online with Ease
Open PSD, TIFF, SVG, EPS, DNG, CDR and the common image formats free in the browser, up to 25 MB, with ICC colour and metadata. No editor, nothing stored.
View EPUB Files Free Online (and Why MOBI Will Not Open)
Open EPUB files free in the browser, up to 25 MB, with search, printing and reflowable text. MOBI is not accepted — convert it to EPUB first.
Simplify Email File Viewing with Online Document Viewer 📧
Learn how the free Online Document Viewer instantly opens MSG and EML email files in any browser—no downloads, no software, secure and hassle‑free.
Doconut Update: Better Rendering for Six File Families
A Doconut library update sharpens Project, PSD, Visio, email, Excel and PowerPoint rendering here. What changed per format, and what did not change.
Online Document Viewer: Your Gateway to Fast and Free Document Viewing 📄
Experience fast, free, high‑fidelity viewing of PDFs, Word, Excel, and images on any device with Online Document Viewer—no software, no signup required.
A Free File Viewer for Hospital Paperwork (Not DICOM)
Hospitals run on PDFs, reports, spreadsheets and scanned images. This free browser viewer opens all of those — and not DICOM. Here is what to expect.
Effortlessly View PowerPoint Presentations Online – Perfect for Teachers and Students! 🎓
Discover a free, fast way to view PowerPoint and OpenOffice presentations online—perfect for teachers and students needing instant access on any device.
Free Online Document Viewer: Excel, PowerPoint, Visio, PDF
A free browser viewer for Excel, PowerPoint, Visio, PDF, CAD, PSD and email files: 70+ extensions, no account, and the upload deleted after viewing.
Improve Research Documentation with Online Document Viewer
SVG, Visio, TIFF, PDF and Office files opened in a browser tab. Free, no account, deleted after viewing — and a plain list of what it will not do.
Revolutionize Your Legal Document Review with OnlineDocumentViewer.com
Transform legal document review with OnlineDocumentViewer.com—secure, browser‑based viewing of PDFs, DOCX, TIFFs and more, no software needed.
View Your TIFF Files for Free on OnlineDocumentViewer.com
Open single and multi-page TIFF files free in the browser, up to 25 MB, with zoom and print. Plus the .NET library that renders them in your own software.
Microsoft Project Viewer: Open MPP and MPX in a Browser
Open Microsoft Project files in the browser. MPP and MPX, up to 20 MB, no Project licence and no account. It renders the plan; it does not edit it.
View PSD Files Effortlessly Online with OnlineDocumentViewer.com
Open a PSD in any browser without Photoshop. Up to 25 MB, the composite as saved, deleted after viewing — and the things a viewer will not do with it.
Viewing EML and MSG Email Files Made Easy with OnlineDocumentViewer
Open EML, MSG and EMLX email files in a browser, up to 10 MB. Body, headers and attachments render — no Outlook, no account, deleted after viewing.
Streamlining Architectural and Engineering Workflows: Viewing CAD and Technical Files Online with OnlineDocumentViewer.com
Open DWG, DXF and DGN in a browser, up to 10 MB, with layer control and measurement — plus the rest of a project's paperwork on the same site.
5 Reasons Why You Should Use an Online Document Viewer for Your Business
Discover why an online document viewer can revolutionize how your business handles documents.
Doconut .NET Library vs the Free Viewer: Which Is Which
The free viewer website and the Doconut .NET library are two different products. What each one does, the format counts, and the four SDK plugins.
Simplifying CAD File Access: View DWG, DGN, and DXF Effortlessly on OnlineDocumentViewer.com
Open DWG, DXF and DGN drawings in a browser. Up to 10 MB, with layer control and measurement, no CAD software and no account.
Viewing PowerPoint and OpenOffice Presentations Made Easy with OnlineDocumentViewer.com
Open PowerPoint and OpenOffice decks in a browser — PPT, PPTX, ODP and six more, up to 20 MB, no software and no account. Plus what a render leaves out.
View DWG, DGN and DXF Files in the Browser
Open DWG, DGN and DXF drawings in the browser, up to 10 MB, with layer control and full-precision zoom. No AutoCAD, no account, nothing stored.
Document Viewing on OnlineDocumentViewer.com
What OnlineDocumentViewer.com renders, the size ceiling for each format, and the things it deliberately does not do. Free, no account, nothing stored.
Viewing CAD Files Online: No Software Required
Open DWG, DXF and DGN drawings in a browser, up to 10 MB, with layer control and measurement. No CAD software, no account, deleted after viewing.
Revolutionizing Document Viewing: Your Go-To Online Document Viewer
What OnlineDocumentViewer.com opens, where each format's size ceiling sits, and what it deliberately does not do. Free, no account, nothing installed.
This Free Document Viewer Opens Files Instantly!
Discover OnlineDocumentViewer, a free, secure web tool that opens PDF, Word, Excel, PowerPoint, images and CAD files instantly on any device.
Frequently Asked Questions OnlineDocumentViewer.com
Straight answers on OnlineDocumentViewer.com: which formats open, the size limit per format, what happens to your file, and what the site does not do.
Document Management: What a Free Viewer Can and Cannot Do
What a free browser viewer covers for everyday document work — 70+ formats, per-format limits — and the storage, accounts and collaboration it has not got.
Everything OnlineDocumentViewer.com Opens (and What It Does Not)
Everything OnlineDocumentViewer.com opens, the size limit for each format, and a plain list of the things it will not do. Free, no account, no install.
Don't Get Stuck with Incompatible Files: 70+ Formats, Free
A free online document viewer that opens 70+ extensions in the browser — PDF, Office, CAD, PSD, email, images — with per-format size limits and no account.
OnlineDocumentViewer.com the best FREE document viewer online: Ultimate Guide to use it 📄✨
Explore the ultimate free online document viewer, OnlineDocumentViewer.com. Easily view files like XLS, PDF, Word, PPT, PSD, DWG, and more!
Say Goodbye to Compatibility Issues: 70+ File Types in Your Browser 💻📄
70+ extensions opened in your browser: what the catalogue covers, the size limit for each format, and what the viewer will not do.
OnlineDocumentViewer.com: Your One-Stop Solution for Viewing Documents
Explore OnlineDocumentViewer.com, a free web viewer that instantly opens PDFs, Word, Excel and more with universal compatibility, clean UI, secure privacy.
The Power of Web Applications for Viewing Files Without Additional Software
Explore how web-based viewers let users open PDFs, docs, spreadsheets and images instantly in browser, boosting accessibility, security and productivity.
A Free Online Viewer for Microsoft Office Files
Open PDF, DOCX, XLSX, PPTX and 70+ other extensions in any browser. Free, no account, a size limit per format, and the file deleted after viewing.
Online Document Viewer: A Versatile Tool for Word Files with Images and Graphics
Open Word files with images, charts and tables in a browser. Nine extensions, 15 MB, no install — and the two things that will not match the sender's screen.
View Your Email Files Easily with Online Document Viewer!
Open EML, MSG and EMLX email files in a browser, up to 10 MB. Body, headers and attachments render — no Outlook, no account, deleted after viewing.
Discover the New Way to View Your PPTX Files!
Open PPT, PPTX, ODP and the template variants in the browser, up to 20 MB. No PowerPoint, no account, and the file is deleted after viewing.
Online Document Viewer: every tool and its size limit
The rebuilt site, stated plainly: which viewer takes which extensions, the size limit on each, and why the converters accept smaller files than viewers.
Experience Speed and Efficiency with the Free PDF Viewer at OnlineDocumentViewer.com
A free online PDF viewer: no download, no account, 25 MB per file, deleted after viewing — plus 70+ other extensions through the same upload box.
View RTF Online with OnlineDocumentViewer.com
Open RTF files in a browser, free, up to 15 MB. No downloads, no account, deleted after viewing — plus the one thing that will not match the original.
Online Document Viewer: PDF, Office, Images and CAD
What the viewer takes for PDF, Word, Excel, PowerPoint, images and AutoCAD files, with the size limit on each. Free, no account, nothing stored.
MPP Viewer Online: Open Microsoft Project Files in a Browser
Open Microsoft Project MPP and MPX files in a browser, up to 20 MB, with no Project licence and no account. It renders the plan; it does not edit it.
Discover the Magic of OnlineDocumentViewer.com to View PSD Files Online
Discover how to view PSD files instantly with OnlineDocumentViewer.com—no download required, fully browser‑based, secure, and accessible on any device.
SVG File Viewer Online: Open Vector Graphics in a Browser
Open SVG files in a browser, up to 25 MB, with zoom and pan and nothing to install — plus what a server-rendered viewer will not do with one.
New Features in Online Document Viewer for CAD, PDF, EML, MSG and many image formats
Explore new Online Document Viewer updates: DOC/DOCX/ODT support, Arabic handling, reliable PDF loading, and enhanced CAD, PSD, WebP, EML and MSG viewing.
Enhance Image Viewer - ICO - EPS - TGA - WEBP - CDR - CMX
Online Document Viewer now supports ICO, EPS, TGA, WebP, CDR, and CMX formats, letting users view icons, graphics, and CorelDRAW files in the browser.
Excel File Viewer: XLS, XLSX, CSV
Open XLS, XLSX, CSV and ODS workbooks in the browser. No install, no account, 20 MB per file. XLS and XLSX also export to PDF, JPG or PNG.
PowerPoint File Viewer: PPT, PPTX
Open PPT, PPTX, PPSX and ODP decks in the browser. No install, no account, 20 MB per deck. PPT and PPTX also export to PDF.
CAD Drawing Viewer: DWG, DXF, DGN
Open DWG, DXF and DGN drawings in the browser. No AutoCAD, no account, 10 MB per drawing. DWG and DXF also export to PDF.
Word File Viewer: DOC, DOCX, RTF
Open DOC, DOCX, RTF and ODT in the browser. No install, no account, 15 MB per file. DOC and DOCX also export to PDF, JPG or PNG.
Document Viewer for ASP.NET Core and .NET Standard
Which runtimes the Doconut viewer targets, where it runs, what the browser has to install, and what the server does instead. Facts, not a sales page.
Online PowerPoint Viewer: PPT, PPTX, ODP
Open PPT, PPTX, ODP and six more presentation formats in the browser. Up to 20 MB, no Office, no account. PPT and PPTX also export to PDF.
Online Excel Viewer: XLS, XLSX, CSV, ODS
Open XLS, XLSX, CSV, ODS and four more spreadsheet formats in any browser, up to 20 MB. No Office, no plugins, no account.
Word Converter: DOC and DOCX to PDF, JPG or PNG
Turn a DOC or DOCX into PDF, JPG or PNG. 15 MB per file. What each output is for, what conversion changes, and which extensions convert at all.
ASP.NET DOCUMENT VIEWER
Explore the ASP.NET document viewer that renders Word, Excel, PowerPoint, PDF and TIFF in browsers, supporting .NET Framework, .NET Core, MVC and Ajax.