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.BLB·File Extension

BLB Data & Text — A .blb file is a BLB Data & Text. It is a text-based data format widely used for configuration files, data interchange and API payloads.

Data & Textapplication/x-blorb

Quick facts

Extension.blb

File typeBLB Data & Text

MIME typeapplication/x-blorb

CategoryData & Text

Charset—

Compressible—

What is .blb

What is a .blb file?

A .blb file is a BLB Data & Text. It is a text-based data format widely used for configuration files, data interchange and API payloads.

In the mime-db registry it maps to application/x-blorb. When serving .blb over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to application/x-blorb — and is delivered over HTTP via the Content-Type header.

How to open .blb files

Use VS Code or Notepad++ to open and edit .blb files.
Any text editor (Notepad, VS Code) can inspect the raw content as text.

Developer info

When served over HTTP, responses should set the following header:

Content-Type: application/x-blorb

Common software that reads/writes .blb:

VS CodeNotepad++Sublime Textjq

Relation chain

.blbextension of

format

BLB Data & Textserved as

mime type

application/x-blorbsent via header

http header

Related extensions

Related MIME types

Common uses

Configuration files
Data interchange between systems
API request and response payloads
Logs and data exports

How to edit .blb files

Open the file with VS Code, make your changes and save.
Most editors preserve the original formatting and encoding — avoid changing the charset.

How to create .blb files

Create a new file and save it with the .blb extension, or export this format from VS Code.

Frequently asked questions

What programs can open .blb files?

Common options include VS Code, Notepad++, Sublime Text. You can also open many of these files with built-in viewers or a browser.

How do I create a .blb file?

Create a new file in any text editor or the app that owns the format and save it with the .blb extension.

What is the relationship between .blb and the application/x-blorb MIME type?

application/x-blorb is the media type identifier used for .blb files during network transfer (for example in the HTTP Content-Type header).

Sources & standards

Updated 2026-09-13

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