Add your YAML file
Drop one or more .yaml files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
YAML to YML
Restructuring .yaml data as .yml changes the serialization without touching the values themselves. Free, private, and validated — the file never leaves your browser.
Private for supported formats — processed in your browser
Runs on your deviceConvert supported files
Drop YAML files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting YAML data to YAML data
Restructuring .yaml data as .yml changes the serialization without touching the values themselves. A .yaml file stores structured data in YAML, a syntax that uses indentation rather than brackets to express nesting. Its readability made it the configuration language of the DevOps era — Kubernetes manifests, CI pipelines, and Ansible playbooks all live in .yaml files.
.yml is simply the three-letter spelling of the YAML extension — the contents are ordinary YAML in every respect. It became entrenched because early adopters favored terse extensions, and flagship filenames like docker-compose.yml and .travis.yml cemented the habit. For this route the practical draw is fully interchangeable with .yaml — a rename is the whole migration and matches the default filenames that many popular tools generate — balanced against mixed extensions across one codebase complicate tooling and glob rules, which is worth knowing before you commit a large batch.
Why convert YAML to YML?
The practical trigger for this conversion is usually a mismatch: with .yaml, whitespace sensitivity makes both hand-editing errors and machine generation fiddly. Switching to .yml buys you fully interchangeable with .yaml — a rename is the whole migration, which is why it is the better fit for docker-compose.yml service definitions. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
YAML vs YML at a glance
| Aspect | YAML data (.yaml) | YAML data (.yml) |
|---|---|---|
| Format type | Text-based — characters and structure, so there is no visual quality loss | Text-based — characters and structure, so there is no visual quality loss |
| How it stores data | indentation with spaces (tabs are forbidden) expresses structure, with no closing delimiters at all | there is no format difference from .yaml whatsoever; parsers never inspect the extension |
| Strongest at | kubernetes resource manifests and Helm charts | docker-compose.yml service definitions |
| Weak spot | whitespace sensitivity makes both hand-editing errors and machine generation fiddly | mixed extensions across one codebase complicate tooling and glob rules |
Pick YML as the output
Select .yml in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if YML is selectable, the route is real and validated.
Convert on your device
Press Convert. The restructuring is plain local parsing — your data is never posted to a server for processing.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid YML file. Outputs keep the original filename with the .yml extension.
YAML to YML questions, answered
Will converting YAML to YML lose quality?
There is no visual quality to lose — yaml is text-oriented and yml is text-oriented, so the question is structural fidelity. Text, ordering, and basic structure are preserved; complex layout, embedded objects, and styling beyond the target's model are simplified.
Is it private to convert YAML files here?
Yes — the .yaml file is processed inside your browser tab and never uploaded. The restructuring is plain local parsing — your data is never posted to a server for processing. Close the tab and the file is gone from memory.
Where will the YML file work?
Anything that reads .yaml reads .yml identically, from language libraries to editor plugins. The only compatibility question is which spelling a given tool looks for by default when discovering config files.
Will the YML file be bigger or smaller than my YAML?
It depends on the content: there is no format difference from .yaml whatsoever; parsers never inspect the extension. Convert one representative file first and compare before batch-processing a large set.
Can I convert YML back to YAML?
Yes — the reverse route exists as a separate tool. Bear in mind that round-tripping .yaml → .yml → .yaml is not a perfect undo when any lossy step is involved; keep your original if fidelity matters.