The options side by side
| ASiCE Viewer (web) | DigiDoc4 client | ASiC-E Viewer (Android) | |
|---|---|---|---|
| Price | Free | Free | Free, with ads |
| Installation | None | Required | From Google Play |
| Account or sign-up | No | No | No |
| Platforms | Any browser | Windows, macOS, Linux | Android |
| Shows documents and signers | Yes | Yes | Yes |
| Integrity check | Yes | Yes | Yes |
| Official validity verdict | No | Yes | No |
| Creates signatures | No | Yes | No |
| Works offline | After loading | Yes | Yes |
ASiCE Viewer on the web
The lightest option. Open the page, drop the file, read. It shows the documents, the signers and an integrity check, and it runs on phones as well as computers. It does not give a legally binding verdict.
DigiDoc4
The official software from Estonia's Information System Authority. It is free, it validates signatures properly and it is the tool for signing. The cost is installation time and, on managed computers, the need for administrator rights.
Mobile apps
On Android, the ASiC-E Viewer app opens containers offline and can export a document to PDF or Word. It is free and financed by ads; nothing is locked behind them. The official RIA DigiDoc mobile app is another free choice, focused on signing and validating with an Estonian identity.
What "free" should include
A free viewer should not ask for an e-mail address, add watermarks, limit the number of files or hold back the download button. If a site asks you to register before showing a document you already own, look elsewhere. See is a free ASiC-E viewer safe? for the questions worth asking.
Which one to pick
Read occasionally: the web viewer. Sign or validate officially: DigiDoc4. Read on the move: the Android app. Many people use two of them.
Frequently asked questions
Is ASiCE Viewer really free?
Yes. The web viewer has no price, no account and no advertising. The Android app is free and shows ads.
Is there a paid version with more features?
No. There is no paid tier on the website.