What is a TOML tree viewer?

A TOML tree viewer renders your TOML as a collapsible tree so you can explore its structure visually. Each key/value, table and array item becomes a node you can expand or collapse, which is far easier to read than raw TOML for large or deeply nested data.

How do I expand or collapse the tree?

Click any node to toggle it open or closed. Use the "Expand all" and "Collapse all" buttons to open or close the entire tree at once — handy for jumping between a high-level overview and the details.

Can I copy a single value from the tree?

Yes. Hover over any node and click the copy icon to copy that value to your clipboard. For a branch (a table or array), it copies the whole subtree; for a leaf it copies just that value.

Does it handle large or deeply nested TOML?

Yes. Collapsed branches aren't rendered until you open them, so even large TOML stays responsive. Deeper levels start collapsed so you see the overall shape first, then drill into the tables, arrays and values you care about.

Is my TOML data private?

Completely. Parsing and rendering happen entirely in your browser — your TOML is never uploaded or sent to a server. There's no sign-up, and it works offline once the page has loaded.

TOML Viewer - Online TOML Tree Viewer & Explorer

TOML Viewer — Explore TOML as an Interactive Tree

Paste any TOML and explore its structure as a collapsible tree. Tables, arrays of tables and typed values all become nodes you can expand, collapse, search and copy — much easier to scan than raw TOML for large config files like Cargo.toml, pyproject.toml or netlify.toml. Parsing follows the official TOML v1.0 spec and runs entirely in your browser; your data is never uploaded.

Features

✅ Tree explorer — click to expand/collapse tables and arrays
✅ Typed values — strings, numbers, booleans, dates and null at a glance
✅ Search by key or value — filter and highlight matches instantly
✅ Expand all / Collapse all — toggle the whole tree in one click
✅ Hover to copy — copy any value or a whole table subtree
✅ 100% private — parsed and rendered entirely in your browser, no upload, no signup

Common use cases

Audit a Rust Cargo.toml — find a dependency or feature fast
Read a Python pyproject.toml or a netlify.toml deploy config
Understand [[arrays-of-tables]] by seeing them grouped as arrays
Search a large config for a key or value without scrolling

Why this TOML viewer

TOML datetimes render as ISO strings and arrays of tables group naturally, so the tree mirrors how the file is actually structured. The same searchable explorer also handles JSON, XML and YAML — one free, client-side tool for every config format, with nothing sent to a server.

How to use

Paste or type TOML into the editor on the left.
Explore the tree on the right — click nodes, search, or use Expand all / Collapse all.
Hover any value and click the copy icon to copy it.

Related tools

JSON Viewer — explore JSON as a tree
YAML Viewer — explore YAML config as a tree
XML Viewer — explore XML as a tree
JSON to TOML — convert JSON to TOML
TOML to XML — convert TOML to XML
Universal Code Editor — edit & run code in 25+ languages

TOML Viewer OnlineTOML ViewerTOML

Explore TOML as an interactive tree — tables, arrays, expand, collapse & copy