YAML to TOML Converter Online — Free & Private

Convert readable YAML into TOML through a JSON intermediate — ideal when standardising on Cargo.toml or pyproject.toml.

Options

TOML output (serialization)

Sort TOML keys

Conversion result

Ready

Paste input and click Convert to see the result summary here.

YAML source

0chars0 B1lines

TOML output

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All conversions run in your browser. Nothing is uploaded to FastMinify.

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YAML → TOML converter

Convert DevOps YAML into TOML through a JSON intermediate.

Developer notes

• Multi-document YAML streams are rejected. • YAML comments are lost after JSON intermediate. • Align with team TOML style guides after conversion.

When teams pick this route

• Standardise on TOML when upstream still ships YAML. • Preview TOML equivalents of Compose or Helm values.

About these options

CSV exports: choose a delimiter (Auto follows locale — semicolon on /fr), RFC-minimal vs always-quoted fields, line endings, and whether to emit a header row. CSV imports: delimiter is auto-detected from the first line (comma, semicolon, tab, or pipe) — toggle whether row 1 holds column names. JSON output (XML, YAML, or CSV sources): indentation (including compact one-line) and optional recursive key sort. JSON → XML: toggle pretty-printing and indent width. YAML output: indent width, readable vs tighter layout, and deterministic string quoting (there is no source YAML file to “preserve”). XML comments are not represented in the intermediate JSON tree.

Worked example

Simple mapping

Sample input

apiVersion: apps/v1
kind: Deployment
metadata:
  name: checkout-api
  labels:
    app: checkout
spec:
  replicas: 3
  selector:
    matchLabels:
      app: checkout
  template:
    metadata:
      labels:
        app: checkout
    spec:
      containers:
        - name: api
          image: registry.example/checkout:2.4.1
          ports:
            - containerPort: 8080

Sample output

apiVersion = "apps/v1"
kind = "Deployment"

[metadata]
name = "checkout-api"

[metadata.labels]
app = "checkout"

[spec]
replicas = 3

[spec.selector.matchLabels]
app = "checkout"

[spec.template.metadata.labels]
app = "checkout"

[[spec.template.spec.containers]]
name = "api"
image = "registry.example/checkout:2.4.1"

[[spec.template.spec.containers.ports]]
containerPort = 8080

Dependencies

Sample input

service:
  name: billing-gateway
  port: 8443
  tls:
    enabled: true
    minVersion: "1.2"
  endpoints:
    - /health
    - /metrics
    - /ready

Sample output

[service]
name = "billing-gateway"
port = 8443
endpoints = [ "/health", "/metrics", "/ready" ]

[service.tls]
enabled = true
minVersion = "1.2"

Navigate related tools

See YAML → JSON, JSON → TOML, or format TOML with TOML beautifier.

YAML → TOML FAQ

Intermediate JSON step

Anchors and aliases?

Resolved during YAML parse — output reflects expanded structure.

Dates in YAML?

Non-JSON-safe YAML types may error — reshape upstream first.

Privacy?

All parsing stays in your browser.

YAML

Convert YAML to JSON, XML, CSV, TOML, TSV, Properties and INI — cross-target TOML via Properties → TOML and INI → TOML in alsoLinks.

YAML → JSON

YAML → XML

YAML → CSV

YAML → TSV

YAML → Properties

YAML → INI

Other converter families

JSON

Convert JSON to YAML, XML, CSV, TOML, TSV, SQL, HTML, Properties and INI — all in your browser.

XML

Convert XML to YAML, CSV, JSON, TOML, TSV and HTML.

CSV

Convert CSV to JSON, XML, YAML, TOML and TSV.

TOML

Convert TOML to JSON, YAML, XML, CSV, Properties and INI.

TSV

Convert tab-separated values to JSON and CSV.

SQL

Parse INSERT statements to JSON and CSV.

HTML

Convert HTML to JSON, XML, YAML and Markdown.

Markdown

Convert Markdown to HTML locally.

Properties

Convert Java .properties files to JSON, YAML, INI and TOML.

INI

Convert INI configs to JSON, YAML, Properties (flat INI only) and TOML.

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GitHub Actions and GitLab CI — format YAML and check workflow/job structure in your browser.

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Line-oriented JSON/NDJSON and Nginx/Apache access logs — format, filter, validate, and CSV/TSV.

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Multi-doc manifests, structural validate, Ingress/Deployment starters, and Helm values formatting.

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Timestamps, UUID, ULID, Nanoid, cron, passwords, regex, slugify, number bases, case, text diff, and chmod — all client-side.

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Count words, build Markdown TOCs, and clean line lists — all in your browser.

AI & LLM

Token counting, pricing estimates, and context-window fit — 100% browser-local.

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Serialize and deserialize PHP data structures beside JSON workflows.