---
title: "Mark form fields in a PDF document"
method: POST
path: "/pdf/form/mark/"
tags: ["PDF", "form"]
---

# Mark form fields in a PDF document

`POST /pdf/form/mark/`

Returns a modified PDF document with form fields marked with a green border, and hover text showing the field name.

## Response `201`

Marked PDF Document generated successfully

## Other responses

- `400` — Bad request
- `401` — Unauthorized
- `500` — Internal server error

---

[API](https://skmtc.net/onedoclabs/apis/fileforge-api.md) · [All operations](https://skmtc.net/onedoclabs/apis/fileforge-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/onedoclabs/fileforge-api/versions/a5a51ce2a2fd/schema)