Typed List JSON, YAML & JSON Lines Converter
Convert plain-text lists, JSON arrays, JSON Lines and YAML sequences with item type previews and exact numeric source digits preserved.
Ready. Explore the example or use the input controls to begin.
Scope and practical limits
Up to 50,000 input characters, 5,000 items and 30 nested containers. Plain lines always create strings. Structured input must be a JSON-compatible sequence. Plain-line output rejects nonstrings or items with line breaks to prevent silent loss. YAML comments, anchor names and formatting are omitted.
The tool processes your work in the browser. The website’s advertising and analytics follow its privacy and consent settings. Projects are not saved automatically. Media workspaces export their files directly rather than storing them in project JSON.
Using Typed List JSON, YAML & JSON Lines Converter
Convert plain-text lists, JSON arrays, JSON Lines and YAML sequences with item type previews and exact numeric source digits preserved.
- Enter or import your list and select its actual input format.
- Choose the output format and review item counts, types and validation messages.
- Download the output or a JSON list; save a project to keep your editable settings.
Example
Convert ["00123",true,null,12345678901234567890] from JSON array to YAML sequence. The string stays a string, booleans/null keep their types, and the large integer digits remain exact.
Questions & answers
Does it turn numeric-looking text into numbers?
Plain-line input always creates strings, so identifiers such as 00123 are preserved. Use structured input to supply actual numbers.
How are large numbers handled?
The existing token-based JSON/YAML engine preserves source numeric digits instead of converting them through JavaScript Number. Other software reading the export may still round them.
Why can plain-line export be rejected?
Nonstring values or embedded line breaks would lose type or item-boundary information. JSON array or JSON Lines output preserves those values.
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