Flutter ARB format (.arb)

The Flutter ARB format reads .arb files, the JSON message-resource format used by Flutter's gen-l10n tooling and the Dart intl package. Each file is monolingual: one locale (named by @@locale, or inferred from the filename), where resource keys map to ICU MessageFormat message strings.

Each message becomes a translatable block. Sibling @<id> objects describe a resource (its description and placeholders) and @@<global> keys hold file metadata (@@locale, @@last_modified, @@author, @@context); both are preserved verbatim and never extracted. ICU placeholders ({name}), plurals ({count, plural, …}), and select/gender ({g, select, …}) are protected as opaque inline codes so their syntax is never translated, and @description is surfaced as a translator note. Output is byte-faithful: key order, JSON escaping, and all @/@@ metadata round-trip untouched.

IDarb

SourceBuilt-in

Extensions.arb

MIME Typesapplication/json

CapabilitiesRead + Write

Parameters

Parameter	Type	Default	Description
descriptionNotes	boolean	true	Vis den menneskevendte konteksten i en ressurs' tilhørende "@<id>"-attributtobjekt som utviklernotater: ressursens "description" pluss hver plassholder's "example"/"description"-hint. Attributtobjektet bevares alltid byte-trofast ved rundtur uavhengig av denne innstillingen.

Configure it live

Configuration

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Configuration output

vs defaults no changes

apiVersion: neokapi/v1
kind: ArbFormatConfig
metadata:
  name: arb
spec:
  # (default configuration)

Examples

Ignore descriptions

Do not turn @description values into translator notes.

descriptionNotes: false

Processing notes

• One file = one locale; the message value is the block's source content.

• @<id> attribute objects and @@<global> metadata are preserved but not extracted as translatable content.

• ICU MessageFormat constructs (placeholders, plural, select, gender) are protected as inline codes, not translatable structure.

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