Question 1

Is Online Document Viewer really free?

Accepted Answer

Yes, Online Document Viewer is completely free to use for individuals. There are no hidden fees, subscriptions, or credit cards required to view your documents.

Question 2

Do I need to create an account to view files?

Accepted Answer

No, you do not need to register or create an account. You can simply upload your file and view it instantly in your browser.

Question 3

Can I use this viewer on my mobile phone?

Accepted Answer

Yes, our viewer is fully responsive and works on all modern mobile devices, tablets, and desktop computers (Windows, Mac, Linux).

Question 4

Do I need to install any software or plugins?

Accepted Answer

No installation is required. The viewer runs entirely in your web browser using HTML5 technology. You don't need Adobe Acrobat, Microsoft Office, or AutoCAD installed.

Question 5

Is it safe to upload my private documents?

Accepted Answer

Yes. We use HTTPS encryption for all transfers. Your files are processed in a secure, temporary session and are not permanently stored on our public servers.

Question 6

How long do you keep my files?

Accepted Answer

Files are automatically deleted from our servers immediately after your viewing session ends or when you close the browser tab. We have a strict 'view-and-delete' policy.

Question 7

Can anyone else see the document I uploaded?

Accepted Answer

No. Your document is assigned a unique, secure session ID that is only valid for your current browser session. It is not listed publicly.

Question 8

What file formats can I view?

Accepted Answer

We support a wide range of formats including PDF, Microsoft Word (DOC, DOCX), Excel (XLS, XLSX), PowerPoint (PPT, PPTX), CAD (DWG, DXF), Images (PSD, TIFF), and many more.

Question 9

Can I view AutoCAD (DWG) files without AutoCAD?

Accepted Answer

Yes, our viewer includes a high-fidelity CAD rendering engine that allows you to view DWG and DXF files without needing an AutoCAD license.

Question 10

Does it support password-protected files?

Accepted Answer

Yes, if your PDF or Office document is password-protected, you will be prompted to enter the password to decrypt and view it securely.

Question 11

Why does my document look slightly different than on my desktop?

Accepted Answer

While we strive for 100% fidelity, some complex fonts or layout features may render slightly differently in a web environment compared to native desktop applications.

Question 12

What is the maximum file size I can upload?

Accepted Answer

For the free online viewer, we currently support files up to 25MB. This covers most standard documents, spreadsheets, and drawings.

Question 13

Why am I getting an 'Upload Failed' error?

Accepted Answer

This can happen if the file is corrupted, empty, larger than the 25MB limit, or in an unsupported format. Please check your file and try again.

Question 14

Can I print the document from the viewer?

Accepted Answer

Yes, you can use your browser's print function (Ctrl+P or Cmd+P) to print the document as it appears on your screen.

Question 15

My file won't load. Who can I contact?

Accepted Answer

Since this is a free tool, we do not offer personalized support for individual files. However, if you are a developer, you can contact the Doconut team for SDK support.

Question 16

Can I embed this viewer on my own website?

Accepted Answer

This specific website is for personal use. However, you can purchase the **Doconut SDK** to embed this exact same viewer technology into your own web applications.

Question 17

Is there an API available?

Accepted Answer

Yes, Doconut offers a comprehensive .NET API for document viewing, conversion, and search. It supports Docker, Azure, and on-premise hosting.

Question 18

What technology powers this viewer?

Accepted Answer

This site is built using Next.js for the frontend and the **Doconut .NET Viewer** library for the backend rendering engine.

Question 19

How can I buy the Doconut SDK?

Accepted Answer

You can visit [Doconut.com](https://doconut.com) to view pricing, download a free trial, and contact the sales team.

Question 20

Does the SDK support OCR?

Accepted Answer

Yes, the Doconut SDK includes options for OCR (Optical Character Recognition) to make scanned documents searchable.

Frequently Asked Questions

General

Security & Privacy

File Formats

Technical & Troubleshooting

For Developers

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