Open in Edge or Chrome
- Open Edge (preinstalled) or Chrome and go to asiceviewer.com.
- Open File Explorer next to the browser window.
- Drag the
.asicefile 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
- Right-click an
.asicefile. - Choose Open with → Choose another app.
- 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 opens them offline. The Mac equivalent of this guide is ASiC-E 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.