twineconvert

free · in-browser · no upload

XML to TOML
Converter

Drop your XML file. We'll convert it to TOML right here in your browser, your file never leaves your device.

or drop your file

Select your file here to get started

or drop your file here.

Accepts .xml

nothing uploaded no file size cap no signup

How it works

Three steps. No upload, no signup.

  1. 1

    Drop your file

    Click the dropzone above or drag a XML from your desktop. Files of any size, there's no upload, so there's no upload limit.

  2. 2

    Convert in your browser

    The conversion runs entirely in this tab using JavaScript and WebAssembly. Your file never touches our servers, we don't have any.

  3. 3

    Download

    Get your TOML the moment the conversion finishes. Convert another, or close the tab.

Files stay on your device

Your file is never uploaded. The entire conversion runs in your browser using WebAssembly. We can't see what you convert because we have no server to see it.

No file size limit

Server converters cap free users at 1-2 GB and gate larger files behind a paid plan. Since nothing uploads, our limit is whatever your browser can handle.

Free, no signup, no ads on conversions

No account required. No watermark on the output. No queue. Drop a file, get a converted file.

Why convert XML → TOML

What this conversion is actually for

XML and TOML are both configuration/serialization formats. This parses the XML into a plain key/value document and re-serialises it as TOML, preserving keys, nesting, scalars, and arrays. Use it to move config into a Cargo.toml, pyproject.toml, or Rust/Python config. Runs in your browser, nothing is uploaded; XML-only niceties like comments are not carried over.

A real example

You have a XML config and a tool that expects TOML. Drop the XML here and get equivalent TOML back.

Troubleshooting

TOML conversion failed.

TOML 1.0 cannot represent every shape (e.g. null values, or arrays mixing types). Remove or normalise those fields in the source, then reconvert.

Formats involved

About XML and TOML

XML, Extensible Markup Language

XML is a hierarchical text format with opening + closing tags, originated at W3C in 1998 as a structured alternative to HTML. Still the lingua franca for legacy enterprise data exchange (SOAP web services, Office Open XML/.docx, RSS feeds, Java Spring configs, SVG, financial reporting like XBRL). JSON has displaced it in modern web APIs; XML lives on in compliance, document formats, and B2B integrations.

How to open

Any text editor with XML syntax highlighting. Browsers render most XML files with collapsible tree views. Validators against XSD schemas come with most IDEs.

Full XML format guide →
TOML, Tom's Obvious Minimal Language

TOML is a config format designed by GitHub co-founder Tom Preston-Werner in 2013 as a more readable alternative to YAML and INI. Its appeal is unambiguous syntax — TOML files always parse the same way regardless of indentation. Used by Cargo (Rust), pyproject.toml (Python packaging), pnpm-workspace, Hugo, Netlify, and many others. v1.0.0 spec finalized in 2021.

How to open

Any text editor. Most modern IDEs ship TOML syntax highlighting; VS Code's Even Better TOML extension adds validation.

Full TOML format guide →

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FAQ

Common questions

Is this XML → TOML converter really free?

Yes. No signup, no watermark, no daily file count limit. Every conversion runs in your browser, your file never touches our servers because there are no servers.

Where does my file go when I convert it?

Nowhere. The conversion runs entirely in your browser using JavaScript and WebAssembly. Your file is never uploaded to our servers. We don't have any servers handling files, there's nothing for us to log, store, or accidentally leak.

What's the maximum file size?

Whatever your browser can hold in memory. Practically, this means a few hundred MB on most computers, significantly larger than the 1-2 GB caps that server-upload converters charge for. Very large files (multi-GB) may require closing other browser tabs first.

Why convert XML to TOML?

Hierarchical data interchange (legacy APIs, document formats, B2B). Application/package config in Rust, modern Python, and static site generators. The most common reason to convert is compatibility, TOML works in places where XML doesn't, or vice versa.

How do I open a XML file in the first place?

Any text editor with XML syntax highlighting. Browsers render most XML files with collapsible tree views. Validators against XSD schemas come with most IDEs.

Does this work offline?

Once the page is loaded, the conversion itself runs entirely offline. The first time you use a tool, your browser downloads the conversion library (a one-time cache). If you reload while offline, the page won't load, but you can install the site as a Progressive Web App for full offline use.

Can I convert multiple files at once?

Single file at a time for now. Batch conversion is on the roadmap, for now, drop one file, download the result, then convert the next.