brat runs in your browser, and to use brat on an existing installation, you only need a supported browser — no software or plugin installation is required!
If you have a supported browser, you can find a link to a live demo installation of brat from the brat home page. If you don't yet have a supported browser, you can install one freely and easily from one of the sites linked in the table below.
(if you wish to create a new installation of brat, please see the installation page.)
brat browser support
brat is implemented using standard web technologies and should, in principle, be usable in any standards-compliant browser.
In practice not all browsers currently fully support all aspects of the technologies used to implement visualization and editing in brat. The following table summarizes the current browser support for brat functions.
|Chrome (Google) on PC/Mac||Full||Full|
|Safari (Apple) on PC/Mac||Full||Full|
|Internet Explorer (Microsoft) version 9||Full||Partial|
|Safari (Apple) on iPad/iPhone||Full||Partial|
|Android browser (Google) on Android tablet/phone||Full||No|
|Internet Explorer (Microsoft) version < 9||No||No|
"Visualization" refers to the functionality for viewing existing annotations and navigating in collections, and "Editing" to functionality for changing or removing existing annotations and creating new ones. Editing is only possible on browsers supporting visualization.
Please note the following:
- brat is not specifically tested on browsers not listed here, but basic functionality is likely to work also on other modern, standards-compliant browsers.
- Even if a browser is not fully supported, it may still be possible to use it with brat for visualization and basic editing.
- Some versions of browsers listed as fully supported may have minor visual problems. For example, there is a known issue with the menu being rendered overly large on Internet Explorer, but this does not prevent use of brat.
- On touch-based interfaces such as those on the iPad, the iPhone, and Android tablets, selection is currently not supported, so editing is limited to existing annotations. We hope to address this limitation in the next release.
- There is a known issue with selection in SVG in the Opera browser. We hope to be able to address this in the next release.
- The above table is based on testing with recent browser versions. Older versions may not support the same features.