YAML TOML

YAML to TOML Converter

Convert YAML to TOML in your browser. Free, private, and fast. YAML config as TOML — nothing is uploaded.

Drag & drop your YAML file here

or

Max file size: 50 MB · Your file stays in your browser

Your file is processed locally in your browser — nothing is ever uploaded.

Why Convert YAML to TOML?

Convert a YAML configuration into TOML. Because TOML needs a table at the top level and has no null value, lists at the top level are rejected and null values are dropped.

Common use cases

  • You have a YAML file and need it in TOML format.
  • The target software or platform requires TOML but your file is in YAML.
  • Typical use of TOML: Reading project configuration as JSON for scripts.
  • You want to reduce file size or improve compatibility without using desktop software.
Keep in mind: TOML has no null value and needs a table at the top level, so some JSON and YAML documents cannot be expressed in it without changes.

How to Convert YAML to TOML

  1. Upload or drop your YAML file into the converter above.
  2. Adjust any output settings for TOML if needed.
  3. Click Convert and download your converted file instantly.

About the Formats

YAML (YAML Ain't Markup Language)

YAML is a human-friendly data format that uses indentation instead of brackets and quotes. It is the de-facto standard for configuration files — Kubernetes, Docker Compose, GitHub Actions, and CI pipelines all speak YAML — and it maps one-to-one onto the same data model as JSON.

Compatibility: Supported by all major languages via libraries. Not natively parsed by browsers — which is why converters exist.

TOML (Tom's Obvious Minimal Language)

TOML is a configuration file format designed to be easy for people to read and write. It is used by Rust (Cargo), Python (pyproject.toml), Hugo and many other tools, and maps clearly onto a dictionary of values.

Compatibility: Supported by libraries for every major programming language.

100% Private & Browser-Based

Your files never leave your device. All conversion happens locally in your browser — nothing is uploaded to any server. No sign-up required.

YAML to JSON Converter
JSON to TOML Converter

Need the reverse?

TOML to YAML Converter

FAQ

Frequently Asked Questions

Yes — completely free with no sign-up, no watermarks, and no size limits for typical files.

Quality depends on the output settings. For lossless output, choose the highest quality setting available.

Your file is processed entirely within your browser using local JavaScript. It is never uploaded to any server. Only you can access your file.

For browser-based conversion, files up to 50 MB work best. Very large files may take longer depending on your device. We recommend splitting very large files before converting.

Currently, AintoB converts one file at a time to keep the browser-based process simple and private. Reload the page to convert another file.