# ASiC-E Viewer for Windows 10 and 11

> Windows does not open `.asice` files on its own. Here is how to get an ASiC-E viewer for Windows working in a minute, and how to make it the default if you use it often.

Source: https://asiceviewer.com/en/blog/asice-viewer-for-windows/
Published: 2026-11-10 · Digixy

## In short

- Fastest: drag the file into Edge or Chrome at [asiceviewer.com](https://asiceviewer.com/en/#tool).
- Official: install DigiDoc4 from id.ee.
- Show file extensions in Explorer so you can tell `.asice` from `.zip`.

## Open in Edge or Chrome

1. Open Edge (preinstalled) or Chrome and go to asiceviewer.com.
2. Open File Explorer next to the browser window.
3. Drag the `.asice` file onto the page.

The documents and signatures appear at once. This works the same on Windows 10 and Windows 11, on home and enterprise editions.

## Drag straight from Outlook

In the Outlook desktop program you can drag an attachment from a message onto the browser page without saving it first. In Outlook on the web, download the attachment and drag it from the downloads list.

## Make the web viewer feel like a program

In Edge, open the menu and choose **Apps → Install this site as an app**; in Chrome, **Cast, save and share → Install page as app**. ASiCE Viewer then gets its own window, a taskbar icon and an entry in the Start menu.

## Install DigiDoc4 for official work

Download the ID-software from id.ee and run the installer. DigiDoc4 registers itself for `.asice`, `.bdoc`, `.ddoc` and related files, so double-clicking opens them. Installation needs administrator rights.

## Set or change the default app

1. Right-click an `.asice` file.
2. Choose **Open with → Choose another app**.
3. Select the program and tick **Always**.

## See the real extension

By default Explorer hides extensions. In Windows 11, choose **View → Show → File name extensions**; in Windows 10, tick **File name extensions** on the View tab. Now `contract.asice` and `contract.zip` are distinguishable.

## Windows-specific problems

| Problem | Fix |
| File opens in Notepad as gibberish | Change the default app as above |
| "Windows can't open this file" | Use the browser viewer |
| SmartScreen warns about a downloaded file | The warning concerns the download; viewing in the browser executes nothing |
| Company laptop blocks installers | The browser viewer needs no rights |

## Quick peek with built-in tools

Windows can open ZIP archives. Rename a **copy** of the file to `.zip` and double-click it to see the documents. You will not see signer information this way.

## Phone as a companion

If you also read signed files away from the PC, the [ASiC-E Viewer app for Android](https://play.google.com/store/apps/details?id=com.digixy.asiceviewer&hl=en&referrer=utm_source%3Dasiceviewer.com%26utm_medium%3Dblog-md) opens them offline. The Mac equivalent of this guide is [ASiC-E viewer for Mac](https://asiceviewer.com/en/blog/asice-viewer-for-mac/).

## Frequently asked questions

**Does Windows 11 have a built-in ASiC-E viewer?**

No. Use a browser-based viewer or install DigiDoc4.

**Can I use ASiCE Viewer on Windows without internet?**

The page must load once. For fully offline work on a PC, DigiDoc4 is the option.

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Open your .asice file now: https://asiceviewer.com/en/
ASiC-E Viewer on Google Play: https://play.google.com/store/apps/details?id=com.digixy.asiceviewer