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Markdown Frontmatter Parser

Read leading --- YAML, +++ TOML, or a leading JSON object and return metadata separately from Markdown body. No delimiter means empty metadata. Use installed parsers; reject YAML aliases/tags/duplicate keys, non-finite numbers and non-mapping roots. Limits: 32 KiB, 50 levels, 10,000 nodes. Large integers and TOML date values export as strings; Markdown is not rendered.

markdown-frontmatter-parserLOCAL WORKSPACE

Enabling local controls…

Inputs and settings

Processed in this tab without uploading or storing inputs. Each text field is limited to 32 KiB and complete output to 1 MiB; additional format and model limits apply.

Results

Review the settings and run. Editing inputs clears old results.

Processing model and limits

Read leading --- YAML, +++ TOML, or a leading JSON object and return metadata separately from Markdown body. No delimiter means empty metadata. Use installed parsers; reject YAML aliases/tags/duplicate keys, non-finite numbers and non-mapping roots. Limits: 32 KiB, 50 levels, 10,000 nodes. Large integers and TOML date values export as strings; Markdown is not rendered.

Data and model checked: YAML 1.2.2 specification ↗Source tool controls ↗

How to use this tool

Load the example, confirm field units and processing rules, then run locally. Editing any input clears the old result. Copy or download the complete output explicitly.

When not to use it

Read leading --- YAML, +++ TOML, or a leading JSON object and return metadata separately from Markdown body. No delimiter means empty metadata. Use installed parsers; reject YAML aliases/tags/duplicate keys, non-finite numbers and non-mapping roots. Limits: 32 KiB, 50 levels, 10,000 nodes. Large integers and TOML date values export as strings; Markdown is not rendered.