Simplify Document Management with Doconut.app: The Free Online Viewer for All File Types

You have a file your machine will not open, and installing something to read it once is out of proportion. Doconut.app opens 70+ extensions in the browser, free and without an account, and deletes the file when you close the tab. It is a viewer rather than a filing system: nothing is stored, so there is nothing to manage afterwards.

Key Features of Doconut.app

1. Wide Format Support

Seventy-plus extensions across seventeen viewers, each with its own ceiling:

• PDF — up to 25 MB
• Word (DOC, DOCX, ODT, RTF and the template variants) — 15 MB
• Excel (XLS, XLSX, CSV, ODS, XLSM, XLSB) — 20 MB
• PowerPoint (PPT, PPTX, ODP and the slideshow and template variants) — 20 MB
• CAD (DWG, DXF, DGN) — 10 MB
• PSD, Visio, TIFF, EPUB and the image formats — 25 MB
• Email (EML, MSG, EMLX) — 10 MB
• Project (MPP, MPX) — 20 MB
• XML, HTML and plain text — 5 MB

That is the single most useful thing to know before you rely on it: there is no site-wide size limit, only a limit per format. Go over one and the message names it.

It is not literally every file type. DICOM medical imaging (.dcm, .ima) is deliberately left out of the free viewers, and Illustrator .ai is not supported at all.

2. User-Friendly Interface

Move between pages, jump to a page number, zoom, fit the page to the window, and print what is on screen with Ctrl+P. That is the toolset. There is no editing, no annotating and no converting — the viewer draws the file, it does not write a new one.

3. No Installations or Downloads Required

One of the standout features of Doconut.app is that it does not require any installations or downloads. Users can upload documents and access them instantly, enhancing convenience and efficiency.

4. Privacy and Security

The upload runs over HTTPS, and your file is deleted from our servers when the viewing session ends. There is no library, no history and no account, so there is nothing to come back to and nothing to attribute to you.

What we do not claim: we hold no ISO 27001, SOC 2 or HIPAA certification, and we are not offering encrypted long-term storage — because we are not offering storage at all. For a document that must never leave your own network, use software you host yourself.

5. Cross-Device Compatibility

The rendering happens on our servers, so an old laptop opens a layered PSD as readily as a new one. Phones, tablets and desktops all get the same pages; the device stops being the limiting factor, though your upload speed does not.

6. Regular Updates

A commitment to enhancement is evident through the regular updates Doconut.app receives. New features and improvements are consistently rolled out to provide users with the best possible experience.

7. Completely Free to Use

Doconut.app stands out in the market as a completely free service, with no hidden fees or subscriptions involved. This makes it an accessible resource for anyone in need of a document viewer.

8. A separate viewer per format family

Each family has its own page rather than one generic uploader: email for EML and MSG, CAD for DWG and DXF, PSD for Photoshop files, and so on through all seventeen. That is why the limits differ, and why the error message can tell you the exact one for what you tried.

Unique Value Proposition

One page replaces a shelf of applications you would otherwise install to open one file each. It does one thing — it shows you what is in the document — and it charges nothing and keeps nothing to do it.

Key Takeaways

• 70+ extensions, with the size ceiling set per format: 25 MB down to 5 MB, never one number for the whole site.
• Nothing to install and no account to create.
• Deleted after viewing — HTTPS on the way in, nothing kept afterwards, and no certification claimed.
• Server-side rendering, so a slow device is not the bottleneck.
• Free, with no paid tier to be upsold to.
• Seventeen viewers, one per format family, each with its own page.
• Viewing only — no editing, no conversion, no batch upload.

Start with the page for whatever is currently stuck: PDF, Word, Excel or CAD. If you need the file in a different format rather than just readable, that is the sibling site OnlineDocumentViewer.com.