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JSON / YAML / TOML Converter

Convert between JSON, YAML, and TOML. Paste in any format, choose the output format and get a clean config.

Source

Paste your config in JSON, YAML, or TOML. The result updates as you type.

Converted config

Copy and paste the output into your config files. Review before committing.

Paste JSON, YAML, or TOML and choose input/output format. Result updates as you type.

Different tools and ecosystems prefer different config formats:

  • npm, many APIs, frontend configs — JSON
  • Docker Compose, Kubernetes, Ansible — YAML
  • Rust (Cargo.toml), Python (pyproject.toml), some CLIs — TOML

Instead of manually rewriting configs, use this converter to switch between JSON, YAML, and TOML in any direction. Paste in one format, choose the output format, and get a clean result. Conversion runs as you type — no “Convert” button needed.

Quick start

  1. Paste your config into the left panel — JSON, YAML, or TOML.
  2. Set input format with the buttons (JSON / YAML / TOML) if the pasted text isn’t in the default.
  3. Set output format in the right panel (the format that matches the input is hidden).
  4. Copy the result from the right panel into your config file.
  5. Review the output before using it in production.

Why convert between JSON, YAML, and TOML?

  • One config, many tools: The same data may be needed as JSON for an API, YAML for Kubernetes, or TOML for a Rust project.
  • No manual retyping: Avoid errors and save time when moving configs between ecosystems.
  • Readable ↔ compact: Convert from minified JSON to readable YAML, or from TOML to JSON for a script.
  • Migration: Move legacy configs (e.g. JSON) into YAML or TOML without hand-editing.
  • Learning: See how the same structure looks in each format.

Supported directions

The tool supports all six directions:

  • JSON → YAML
  • JSON → TOML
  • YAML → JSON
  • YAML → TOML
  • TOML → JSON
  • TOML → YAML

If you choose the same format for input and output, the result is re-formatted (e.g. pretty-printed). Output is always pretty-printed and includes a trailing newline.

When to use which format

  • JSON: Universal; required by many APIs, npm, and frontend tooling. No comments; strict syntax.
  • YAML: Human-friendly; common in DevOps (Kubernetes, Docker Compose, Ansible). Supports comments and multi-line strings.
  • TOML: Clear key-value style; used by Rust (Cargo.toml), Python (pyproject.toml), and many CLIs. Good for config that stays in one place.

Use cases

DevOps: Convert Kubernetes or Docker Compose snippets to JSON for scripts, or the other way around.

API work: Turn API response JSON into YAML for documentation or into TOML for local config.

Project configs: Move between package.json-style JSON, YAML CI configs, and TOML (e.g. pyproject.toml).

Learning: Compare how the same data is written in JSON, YAML, and TOML.

Migration: Bring old JSON configs into YAML or TOML without manual rewrite.

Privacy & security

Conversion runs entirely in your browser. Your config is never uploaded or logged. Safe for sensitive and production configs — but always review the output before committing or deploying.

Final thoughts

Whether you need JSON for an API, YAML for Kubernetes, or TOML for a Rust project, this converter lets you switch formats in seconds. Paste, choose input and output format, and copy the result. No server round-trip, no account — just a quick, client-side config conversion.

  1. Paste your config in JSON, YAML, or TOML into the input area. Use a sample or your own.
  2. Choose input and output format. The result updates automatically as you type.
  3. Copy the result into your config file. Review before using in production.

FAQ

No. Conversion runs entirely in your browser. Nothing is uploaded.

JSON, YAML, and TOML. You can convert between any pair. Standard syntax only (e.g. no comments in JSON, no trailing commas).

Yes. Paste JSON, YAML, or TOML and choose the output format. All six directions (JSON↔YAML, JSON↔TOML, YAML↔TOML) are supported.

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This tool is provided for personal and educational use only. We do not host or store any user content or media files on our servers. All processing happens locally in your browser. We are not affiliated with or endorsed by any social network, platform, or company mentioned. Use this service at your own discretion and in compliance with the respective platform’s terms of service.