YAML ↔ TOML converter

Client

Direct conversion in the browser—also see JSON ↔ YAML and JSON ↔ TOML.

About YAML ↔ TOML

Convert YAML and TOML config formats bidirectionally in the browser—no JSON intermediate page. The interactive transform on this page runs in your browser tab—Toolcore does not need your paste for the core operation described above.

How to use this page

Paste or type in the main workspace, run the primary action from the toolbar, then copy or download the result. Use Load example when the page offers it, or URL prefill (?q= / ?qb=) so agents and tickets open the same input.

YAML & TOML

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Uses js-yaml and @iarna/toml locally. Complex YAML anchors or inline tables may not round-trip—validate before production deploys.

Paste YAML or TOML and convert in your browser—arrays at the root are wrapped for TOML tables.

Nearby workflows on Toolcore

  • YAML ↔ JSON — YAML to JSON and JSON to YAML online—bidirectional converter, format either side in the browser. when the payload needs a different encoding or escape format.
  • TOML ↔ JSON — TOML to JSON and JSON to TOML online—format, validate, convert locally. when the payload needs a different encoding or escape format.
  • HOCON ↔ JSON — HOCON config to JSON and JSON to HOCON online—format, validate, convert locally. when the payload needs a different encoding or escape format.
  • Encoding tools — Hub index: Base64 & URL, Base64url, Base32, Crockford, LEB128, ASCII85, Z85, Base58, base-36, bencode, Morse, quoted-printable, URI, Puny… when the payload needs a different encoding or escape format.

Common use cases

  • Migrate Kubernetes-style YAML snippets toward TOML configs.
  • Compare TOML from Cargo.toml with YAML equivalents.
  • Quick one-off conversion without a JSON intermediate page.

Common mistakes to avoid

  • Expecting perfect round-trip

    Anchors, dates, and inline tables may shift—review output.

  • Root arrays in TOML

    Root-level YAML arrays are wrapped under a table key for TOML.

FAQ

JSON hub routes?

Use JSON ↔ YAML or JSON ↔ TOML in the JSON hub when JSON is the pivot format.

Validate TOML?

Parse errors surface on convert—fix syntax and retry.

Common search terms

Phrases people search for that match this tool. See the full long-tail keyword index.

  • yaml to toml converter online
  • toml to yaml convert browser
  • config yaml tom convert local
  • cargo pyproject yaml toml tool

More tools

Related utilities you can open in another tab—mostly client-side.