Archive format

XAR format guide

A .xar file is extensible Archive input pending a deterministic browser fixture. This release documents the format but does not expose a converter until its browser engine passes the fixture gate.

Current availability

Format information only

Novus Convert does not currently process this format. No upload or download control is shown because the site never represents an unavailable conversion as working.

View available formats

Where XAR comes from

XAR archive files using the .xar extension belong to the archive ecosystem and remain in use where their particular interchange or storage model is required. Browser support varies, so this profile distinguishes a tested local engine from reference-only coverage.

How XAR works

The public file extension is .xar.
The format is classified as archive data.
Recognized signatures include xar!.
No conversion route is published until output can be independently validated.

When to use XAR

Opening or exchanging XAR archive files without sending them to a remote converter.
Moving compatible content from .xar into a more broadly supported target.
Inspecting format capabilities and expected fidelity before conversion.

Strengths and limitations

Strengths

Can be handled without uploading private source data when a local engine is available.
Registry-backed routes expose only outputs with a concrete encoder.
Format and size validation catches common extension mismatches early.

Limitations

Some format-specific metadata cannot be represented by every target.
Large or unusually complex files can exceed browser memory limits.
Compatibility depends on the exact dialect and features used by the source file.

Compatibility

XAR archive compatibility depends on the producing application and the format revision. Novus Convert's guide remains reference-only until the browser implementation is verified.

Metadata preservation is target-dependent and may be partial; the converter reports normalization or loss where applicable.