CFG vs YAML: Which Should You Use?

Side-by-side comparison of CFG and YAML data formats — features, pros, cons, and conversion options.

Quick Answer

CFG is best for Application configuration files for legacy and Linux daemons. YAML is best for Configuration files, CI/CD pipelines, and Kubernetes manifests.

Quick Verdict

CFG Best for Application configuration files for legacy and Linux daemons

✓ Trivial to read and edit by hand
✓ Universally used by Linux daemons and applications
✓ Comments and inline documentation supported
✗ No standardized parser — syntax varies

Convert CFG to YAML →

YAML Best for Configuration files, CI/CD pipelines, and Kubernetes manifests

✓ Clean readable syntax with minimal punctuation
✓ Supports comments natively
✓ Anchors and aliases reduce duplication
✗ Indentation-sensitive whitespace errors

Specs Comparison

Side-by-side technical comparison of CFG and YAML

Feature	CFG	YAML
Category	Data	Data
Year Introduced	1980	2001
MIME Type	text/plain	text/yaml
Extensions	.cfg, .conf	.yaml, .yml
Binary Efficient	✗	✗
Human Readable	✓	✓
Nested	✗	✓
Plain Text	✓	✓
Schema Support	✗	✓
Streaming	✗	✓
Typed	✗	✓

Pros & Cons

CFG

Pros

✓ Trivial to read and edit by hand
✓ Universally used by Linux daemons and applications
✓ Comments and inline documentation supported

Cons

✗ No standardized parser — syntax varies
✗ Limited nested structure support
✗ Unicode handling depends on the application

YAML

Pros

✓ Clean readable syntax with minimal punctuation
✓ Supports comments natively
✓ Anchors and aliases reduce duplication

Cons

✗ Indentation-sensitive whitespace errors
✗ Implicit type coercion gotchas (yes/no, 3.10)
✗ Slower parsing than JSON

When to Use Each

Choose CFG when...

You need files optimized for Application configuration files for legacy and Linux daemons
Trivial to read and edit by hand
Universally used by Linux daemons and applications

Choose YAML when...

You need files optimized for Configuration files, CI/CD pipelines, and Kubernetes manifests
Clean readable syntax with minimal punctuation
Supports comments natively

How to Convert

Convert between CFG and YAML for free on ChangeThisFile

Convert CFG to YAML Server-side conversion — auto-deleted after processing

Frequently Asked Questions

What's the difference between CFG and YAML?

CFG is best for Application configuration files for legacy and Linux daemons, while YAML is best for Configuration files, CI/CD pipelines, and Kubernetes manifests. Both are data formats but they differ in compression, compatibility, and intended use cases.

Is CFG or YAML better for data?

It depends on your use case. CFG is better for Application configuration files for legacy and Linux daemons. YAML is better for Configuration files, CI/CD pipelines, and Kubernetes manifests. Consider your specific requirements when choosing between them.

How do I convert CFG to YAML?

Go to the CFG to YAML converter on ChangeThisFile. Upload your file and the conversion processes on the server, then auto-deletes. It's free with no signup required.

Can I convert YAML to CFG?

Direct conversion from YAML to CFG is not currently supported. Check the conversion pages for available routes using intermediate formats.

Which is smaller, CFG or YAML?

File size varies depending on the content, compression method, and quality settings of each format. In general, lossy formats produce smaller files than lossless ones. Test with your specific files to compare actual sizes.

Does CFG support nested?

No, CFG does not support nested, whereas YAML does. This may be an important factor depending on your use case.

Is CFG or YAML free to use?

Both CFG and YAML are supported file formats that are free to use. You can convert between them for free on ChangeThisFile — server-side conversions are free with no signup required.

Which format is newer, CFG or YAML?

YAML is newer — it was introduced in 2001, while CFG dates back to 1980. Newer formats often offer better compression and features, but older formats tend to have wider compatibility.