Outline ↔ Tree Converter — Free Online Tool

What Is Outline ↔ Tree Converter?

A free online tool to convert between indented text outlines and JSON tree structures. Supports tab and space indentation, bullet points, and numbered lists. Ideal for converting notes to structured data for apps and mind maps.

Converting between indented text outlines and structured JSON trees is a common need when working with hierarchical data across different tools. Outline Converter handles both directions — outline to JSON and JSON to outline — supporting tab and space indentation, bullet points, and numbered lists.

The tool accepts several common outline formats. Bullet points (-, *, +, •) and numbered lists (1., a., i.) are automatically stripped during conversion to JSON, leaving only the text content organized in a nested structure. The JSON output uses a simple tree format with 'content' and 'children' fields, making it compatible with mind map editors, data analysis tools, and custom applications that process hierarchical data.

The reverse direction — JSON to outline — converts any JSON tree structure back into a formatted text outline. This is useful when you receive data from an API that returns nested JSON and need a human-readable outline for review, documentation, or note-taking. The indentation is normalized to 2-space indent by default, with configurable tabs or spaces.

The bidirectional conversion means you can round-trip data: export from a mind map as JSON, edit the outline as text in a note-taking app, and convert back to JSON for reimport. The tool also displays node count and maximum depth statistics, giving you insight into the complexity of your hierarchical data at a glance.

Real-World Use Cases for Outline ↔ Tree Converter

Converting Meeting Notes into a JSON Structure for an App

You took meeting notes as a bullet-point outline with indentation for topics, decisions, and action items. Paste the outline into the converter and get a JSON tree. Each level of indentation becomes a nested child. Import the JSON into your project management tool or mind map editor for further structuring.

Converting a JSON API Response into a Readable Outline

A REST API returns a nested JSON object representing a product category hierarchy. Paste the JSON into the converter and get a clean indented outline. The human-readable format is perfect for documentation, code review comments, or sharing with non-technical stakeholders who find JSON hard to read.

Round-Tripping Data Between Mind Maps and Text Editors

Export a mind map as JSON, open it in a text editor to reorder branches via drag-and-drop of indented lines, then convert the edited outline back to JSON for reimport into the mind map editor. This workflow is useful for large maps where text-based editing of hierarchy is faster than manual clicking.

Why Use Outline ↔ Tree Converter?

Bidirectional: outline ↔ JSON tree
Supports tab and 2-space indentation
Strips bullet points and numbering automatically
Shows node count and max depth statistics

How to Use Outline ↔ Tree Converter — Step by Step

Choose direction: Outline → JSON or JSON → Outline.

Paste your indented text or JSON tree into the input.

The conversion updates instantly.

Copy or download the result.

Who Is Outline ↔ Tree Converter Best For?

note conversion
app data prep
mind map import
documentation

Pro Tips for Outline ↔ Tree Converter

1For reliable conversion, use consistent indentation. Mixing tabs and spaces in the same outline can produce unexpected nesting. Stick to one style.
2The JSON output uses a {content, children} format. If your target app expects a different schema (like {name, children} or {label, nodes}), you may need a small transformation step.
3When converting JSON to outline, the tool displays the tree structure indentation. This is useful for verifying that complex nested JSON has the expected hierarchy before using it in documentation.
4Node count and max depth statistics help you assess complexity. A depth of 8+ levels may indicate the outline is too nested and could benefit from flattening or restructuring.

Outline ↔ Tree Converter — Frequently Asked Questions

What indentation styles are supported?

Tabs (1 tab = 1 level) and 2-space indentation. Bullet points (-, *, +, •) and numbered lists are automatically stripped.

Can I use the JSON output with the mind map editor?

The JSON tree structure follows a {content, children} format that can be adapted for mind map import.

What is the maximum file size I can convert?

Most conversions handle files up to 50MB. The exact limit depends on your device's available memory since all processing is local.

Does the converter preserve formatting and special characters?

Yes. The converter handles Unicode characters, special symbols, and formatting where applicable. For structured formats like CSV, column mapping is preserved.

Is Outline ↔ Tree Converter really free to use?

Yes, Outline ↔ Tree Converter is completely free with no hidden charges, no usage limits, and no premium tiers. You can use it as often as you need without signing up or providing any personal information.

Ready to Use Outline ↔ Tree Converter?

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