# Open ASiC-E files online: when it makes sense and what to check

> Opening ASiC-E files online saves you an installation. The real question is what happens to the document: is it sent to someone's server, or does it stay on your device?

Source: https://asiceviewer.com/en/blog/open-asice-files-online/
Published: 2026-11-10 · Digixy

## In short

- "Online" can mean two very different things: upload-and-process, or open-locally-in-the-browser.
- [ASiCE Viewer](https://asiceviewer.com/en/#tool) works locally. The container is unpacked by your browser.
- You can verify this yourself in the browser's network panel.

## Two kinds of online tool

Signed containers usually hold contracts, salary decisions or medical documents. Before using any online service with them, find out which model it follows.

| | Upload model | Local model |
| Where the file is processed | On the provider's server | In your browser |
| Does the document leave your device? | Yes | No |
| Works for very sensitive files? | Only if you trust the provider | Yes |
| Needs a connection after loading? | Yes, for every file | Only to load the page |

ASiCE Viewer follows the local model. The page delivers a program written in JavaScript; your browser runs it and reads the file from your disk.

## How to check it yourself

1. Open the page and press F12 to open developer tools.
2. Switch to the **Network** tab.
3. Drop a file onto the page.
4. Watch the list: requests appear for the page's own scripts, but none of them carries your file.

This takes a minute and works for any tool that claims to be private.

## When online is the right choice

- You are on a work computer where you cannot install software.
- You use a Chromebook, a Linux machine or a tablet.
- You open a signed file a few times a year and do not want another program.
- You are helping someone else and need a solution in one sentence: "open this address and drop the file in".

## When to install something instead

If you sign documents yourself, or you need a legally reliable validation report, install the official client. If you read containers daily on a phone, the [Android app](https://play.google.com/store/apps/details?id=com.digixy.asiceviewer&hl=en&referrer=utm_source%3Dasiceviewer.com%26utm_medium%3Dblog-md) is more comfortable than a browser tab. Read more about how the technology works in [ASiC-E online viewer](https://asiceviewer.com/en/blog/asice-online-viewer/).

## Frequently asked questions

**Is the file stored anywhere after I close the page?**

No. It lives only in the browser's memory while the tab is open. Closing or reloading the tab discards it.

**Does opening ASiC-E files online work without internet?**

The page has to load first. After that, opening an ordinary container needs no further requests, but previewing PDF or Word files loads the matching viewer module on first use.

---

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