# Best ASiC-E Viewer: how to choose the right one for your needs

> There is no single best ASiC-E viewer. There is a best one for reading a contract on a borrowed laptop, another for signing, and another for a phone in a train tunnel.

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

## In short

- Judge by five criteria: privacy, installation, validation, platforms, offline use.
- Quick reading: a browser viewer. Official work: DigiDoc4. Mobile: an app.
- Most regular users end up with two tools.

## Five criteria that matter

1. **Privacy.** Does the document stay on your device?
2. **Installation.** Can you start now, or do you need rights and time?
3. **Validation depth.** Integrity only, or a full legal verdict?
4. **Platforms.** Does it run on the device in your hand?
5. **Offline use.** Does it work without a connection?

## The candidates

| | ASiCE Viewer (web) | DigiDoc4 | ASiC-E Viewer (Android) | RIA DigiDoc (mobile) | ZIP tool |
| Privacy | Local | Local | Local | Local | Local |
| Installation | None | Yes | App | App | Built in |
| Shows signers | Yes | Yes | Yes | Yes | No |
| Integrity check | Yes | Yes | Yes | Yes | No |
| Official validation | No | Yes | No | Yes | No |
| Signs | No | Yes | No | Yes | No |
| Document preview built in | Yes | Opens external apps | Yes | Limited | No |
| Platforms | All | Windows, macOS, Linux | Android | Android, iOS | All |

## Recommendations by need

- **"I just need to read this."** [ASiCE Viewer](https://asiceviewer.com/en/#tool) in the browser. Nothing to install, built-in previews.
- **"I need to know it is legally valid."** DigiDoc4. It is the reference.
- **"I need to sign it."** DigiDoc4 or RIA DigiDoc with your electronic identity.
- **"I read signed files on my phone all the time."** The [ASiC-E Viewer app](https://play.google.com/store/apps/details?id=com.digixy.asiceviewer&hl=en&referrer=utm_source%3Dasiceviewer.com%26utm_medium%3Dblog-md): offline, with PDF and Word export.
- **"I am scripting bulk extraction."** A ZIP tool on the command line.

## Where a web viewer is strongest

It is the fastest path from attachment to readable document, it works on locked-down and non-Windows machines, and it previews PDF, Word and Excel without other programs. Its weakness is by design: no validation verdict and no signing.

## Where the official client is strongest

Authority. Its verdict is the one institutions accept. Its cost is installation and a heavier interface for a simple reading task.

## A reasonable setup

For an office: the official client on the machines of people who sign, and the web viewer bookmarked for everyone else. For an individual: the web viewer, plus the app on the phone.

## How we judge our own tool

ASiCE Viewer aims to be the best at one thing: letting anyone read a signed container immediately and privately. Where another tool is the right answer, this blog says so. The free options are compared in more detail in [free ASiC-E viewer](https://asiceviewer.com/en/blog/free-asice-viewer/).

## Frequently asked questions

**What is the best ASiC-E viewer for Windows?**

For reading, a browser-based viewer; for validation and signing, DigiDoc4. Many people use both.

**Is there one viewer that does everything?**

DigiDoc4 covers signing and validation on computers. For instant reading on any device, a web viewer complements it.

---

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