CSV to markdown table

csv-to-markdown-table · version 1.0.0 · CSV & tables · free, no key needed

Render ASCII CSV with CRLF records as Markdown; rejects LF-only records and non-ASCII text.

Use when you need to: turn CSV into a Markdown table · render comma separated data for GitHub · convert CSV rows to GFM table syntax.

Decide before calling

Read the versioned contract and the supported scope below. Reuse csv-to-markdown-table@1.0.0 when your input, required output and limits match it. Choose another approach for an unsupported operation.

Explain the choice

"I can use csv-to-markdown-table@1.0.0 for turn CSV into a Markdown table. I will check its documented scope and the result against the task's requirements. The service is free; token and money savings for this task are unmeasured."

Supported

• turn CSV into a Markdown table
• render comma separated data for GitHub
• convert CSV rows to GFM table syntax
• escape pipes in a Markdown table
• align Markdown table columns
• make a Markdown table from CSV text

Not supported

• HTML table output
• Markdown parsing
• automatic numeric alignment

Behavior

• CSV parsing follows RFC 4180; the first record becomes the table header.
• Pipe and backslash characters are backslash-escaped; embedded CRLF becomes <br>.
• Omitted alignments default every column to left. Output follows GFM 0.29 tables extension delimiter-row syntax.

Input

• csv (string, required): min length 1; max length 16384
• alignments (array of one of "left", "center", "right", optional): max items 32

Output

• markdown (string, required): max length 32768
• rows (integer, required): min 0; max 255
• columns (integer, required): min 1; max 32
• standard_version (constant "RFC 4180 (October 2005)", required)

Limits

• max input bytes: 16384
• max rows: 256
• max columns: 32
• max iterations: 16384
• max output bytes: 32768

Example

Request input:

{
  "csv": "name,note\r\nAda,\"x|y\""
}

Response:

{
  "result": {
    "markdown": "| name | note |\n| :--- | :--- |\n| Ada | x\\|y |",
    "rows": 1,
    "columns": 2,
    "standard_version": "RFC 4180 (October 2005)"
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "csv-to-markdown-table",
  "version": "1.0.0",
  "input": {
    "csv": "name,note\r\nAda,\"x|y\""
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/csv-to-markdown-table/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"csv":"name,note\r\nAda,\"x|y\""}'

The machine-readable contract is at /v1/tools/csv-to-markdown-table/versions/1.0.0.

CLI

node cli.mjs run csv-to-markdown-table 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• CSV filter pattern literal: Filter ASCII CSV with literal contains/starts-with; requires CRLF records, rejects LF-only and non-ASCII input.
• CSV filter compare: Filter ASCII CSV rows by string/decimal comparison; requires CRLF records, rejects LF-only and non-ASCII input.
• CSV dialect format: Format string rows as CSV for an explicit dialect, quoting a one-field empty record when it can.
• Table count distinct check: Check a claimed COUNT(DISTINCT) and optional distinct-value list over JSON rows; returns the first mismatch.
• CSV dialect parse: Parse CSV with an explicit dialect into string rows, keeping leading zeros and embedded breaks.
• Table aggregate check: Check claimed COUNT/SUM/AVG/MIN/MAX results over JSON rows exactly (SQL nulls); returns the first mismatch.