Rtf to markdown

rtf-to-markdown · version 1.0.0 · Other utilities · free, no key needed

Convert an 8 KiB ANSI-1252 RTF text subset to escaped Markdown; unsupported Word features are refused.

Use when you need to: convert rtf fragment to markdown · extract escaped markdown from rtf · turn base64 rtf into markdown text.

Decide before calling

Read the versioned contract and the supported scope below. Reuse rtf-to-markdown@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 rtf-to-markdown@1.0.0 for convert rtf fragment to markdown. 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

• convert rtf fragment to markdown
• extract escaped markdown from rtf
• turn base64 rtf into markdown text
• preserve rtf bold italics in markdown
• normalize rtf text into safe markdown
• convert ansi rtf text subset

Not supported

• general Word-produced RTF with font/layout/field controls
• non-1252 code pages, binary data or surrogate Unicode
• rendering, macros and external resources

Behavior

• Canonical standard padded Base64, no extra fields. Encoded<=10924 and decoded1..8192 bytes. Only strict ANSI1252 RTF1 text fragment subset; no general Word compatibility.
• Complete bounded lexical pass precedes supported interpretation; unknown visible controls are unsupported422. Resource cap413 terminates before excess retention, malformed structure400 overrides earlier excluded422 only within capped traversal.
• Groupdepth16, totalgroups256, paragraphslots128 include omitted groups and empty slots. Scoped b/i/uc0..2; BMP non-surrogate/private-use exclusions; Unicode fallback counts complete tokens without semantics.
• Literal Markdown punctuation is escaped, HTML&<> encoded, hardbreaks protected; only ASCIIspace/TAB trim/normalize. NBSP and other permitted BMP spaces remain. Omitted destinations and fixed warnings deduplicate in first encounter order.
• Both tools validate identical MarkdownUTF8<=16384 and compact serialized Markdown-envelopeUTF8<=32768; own complete outputUTF8<=32768. Exact generic AppError ABI; absent details, no reflected input payload.
• No network, filesystem, external loads, macros, ZIP/PDF engines, surrogate repair or layout fidelity; real WorkerCPU/preemptive memory and privacy integration remain separate qualification gates.
• Visible hex-decoded CP1252 C0/DEL characters are unsupported_input; valid fallback or omitted hex controls are discarded. Raw CR/LF/TAB exceptions and structural validation stay unchanged.

Input

• bytes_base64 (string, required): min length 4; max length 10924

Output

• markdown (string, required): max length 16384
• format (constant "rtf", required)
• warnings (array of one of "metadata_destinations_omitted", "pictures_omitted", "objects_omitted", "starred_destinations_omitted", "tabs_normalized", required): max items 5

Limits

• max base64 chars: 10924
• max decoded bytes: 8192
• max group depth: 16
• max groups: 256
• max paragraph slots: 128
• max control word letters: 32
• max numeric digits: 10
• max retained text utf8 bytes: 16384
• max markdown utf8 bytes: 16384
• max shared markdown json utf8 bytes: 32768
• max output utf8 bytes: 32768

Example

Request input:

{
  "bytes_base64": "e1xydGYxXGFuc2kgSGVsbG9ccGFyIFdvcmxkfQ=="
}

Response:

{
  "result": {
    "markdown": "Hello\n\nWorld\n",
    "format": "rtf",
    "warnings": []
  }
}

How to call it

MCP

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

{
  "id": "rtf-to-markdown",
  "version": "1.0.0",
  "input": {
    "bytes_base64": "e1xydGYxXGFuc2kgSGVsbG9ccGFyIFdvcmxkfQ=="
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/rtf-to-markdown/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"bytes_base64":"e1xydGYxXGFuc2kgSGVsbG9ccGFyIFdvcmxkfQ=="}'

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

CLI

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

Get the client at /clients/cli/.

Related tools

• Rtf inspect: Inspect an 8 KiB ANSI-1252 RTF text subset: paragraphs, omitted destinations, pictures, objects and warnings.
• Xlsx to markdown: convert excel workbook to markdown.
• Xlsx to CSV: convert excel sheet to csv.
• Xlsx inspect: inspect excel workbook structure.