> ## Documentation Index > Fetch the complete documentation index at: https://developers.gonitro.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Convert File to PDF > *This endpoint was deprecated* on March 24, 2026, and will be sunset on July 1, 2026. Please migrate your existing functionality to the current endpoint: https://developers.gonitro.com/docs/api-reference/sign/create-document-by-envelope-id , which already supports multiple file types. The **Convert File to PDF** endpoint transforms various file formats into PDF documents for use with the Nitro Sign API. ### Input files Supported input document types and formats: | Document Type | Formats | |---------------|---------| | Doc | .doc, .docx, .dot, .xml, .docm, .dotx, .dotm, .rtf | | Excel | .xlsx, .xls, .xlt, .xlsm, .xltx, .xltm | | HTML | .html | | Powerpoint | .pptx, .ppt | | Image | .png, .jpg, .jpeg, .tif, .tiff, .gif | | Other | .csv, .psd, .svg, .eps | ### Output files The **Convert File** Sign API endpoint only supports PDF files as output. ### Asynchronous Processing The **Convert File** endpoint supports only asynchronous processing. When you start a file format conversion, the request returns a job ID. Use this ID with the job endpoints to check the status and retrieve the results once the operation is complete. ## OpenAPI ````yaml https://api.gonitro.dev/openapi.json post /sign/conversions openapi: 3.1.0 info: title: Nitro Sign Public API description: REST API for Nitro Sign version: '0.1' servers: - url: https://api.gonitro.dev security: - bearerAuth: [] paths: /sign/conversions: post: tags: - Sign summary: Convert File to PDF description: > *This endpoint was deprecated* on March 24, 2026, and will be sunset on July 1, 2026. Please migrate your existing functionality to the current endpoint: https://developers.gonitro.com/docs/api-reference/sign/create-document-by-envelope-id , which already supports multiple file types. The **Convert File to PDF** endpoint transforms various file formats into PDF documents for use with the Nitro Sign API. ### Input files Supported input document types and formats: | Document Type | Formats | |---------------|---------| | Doc | .doc, .docx, .dot, .xml, .docm, .dotx, .dotm, .rtf | | Excel | .xlsx, .xls, .xlt, .xlsm, .xltx, .xltm | | HTML | .html | | Powerpoint | .pptx, .ppt | | Image | .png, .jpg, .jpeg, .tif, .tiff, .gif | | Other | .csv, .psd, .svg, .eps | ### Output files The **Convert File** Sign API endpoint only supports PDF files as output. ### Asynchronous Processing The **Convert File** endpoint supports only asynchronous processing. When you start a file format conversion, the request returns a job ID. Use this ID with the job endpoints to check the status and retrieve the results once the operation is complete. operationId: convertFile requestBody: content: multipart/form-data: schema: type: object properties: file: type: string format: binary description: The file to convert to PDF, provided as binary data. required: - file encoding: file: contentType: multipart/form-data responses: '200': description: File conversion initiated successfully content: application/json: schema: $ref: '#/components/schemas/ConvertFileResponse' '400': description: Missing file content: application/json: schema: $ref: '#/components/schemas/BadRequestProblemDetail' '401': description: Unauthorized - Invalid or missing JWT token content: application/problem+json: schema: $ref: '#/components/schemas/UnauthorizedProblemDetail' '413': description: File size exceeds maximum allowed limit content: application/json: schema: $ref: '#/components/schemas/ContentTooLargeProblemDetail' '415': description: File format not supported content: application/json: schema: $ref: '#/components/schemas/UnsupportedMediaTypeDetail' '500': description: Internal server error during conversion process content: application/json: schema: $ref: '#/components/schemas/InternalServerErrorProblemDetail' deprecated: true components: schemas: ConvertFileResponse: type: object properties: jobID: type: string description: Unique identifier for the conversion job example: 01234567-89ab-cdef-0123-456789abcdef status: type: string description: The current status of the file conversion Job enum: - running - completed - failed jobStatusURL: type: string description: URL to poll the current status of the file conversion job example: >- https://api.gonitro.dev/sign/conversions/jobs/01234567-89ab-cdef-0123-456789abcdef/status required: - jobStatusURL BadRequestProblemDetail: type: object description: Bad Request error details example: type: https://developers.gonitro.com/docs/build-nitro/errors#400-bad-request title: Bad Request status: 400 detail: Request validation failed instance: /sign/envelopes validation_errors: name: must not be blank properties: type: type: string description: A URI reference that identifies the problem type title: type: string description: A short, human-readable summary of the problem type status: type: integer format: int32 description: The HTTP status code detail: type: string description: A human-readable explanation specific to this occurrence instance: type: string description: A URI reference that identifies the specific occurrence extensions: type: object additionalProperties: {} description: Additional problem-specific properties UnauthorizedProblemDetail: type: object description: Unauthorized error details example: type: >- https://developers.gonitro.com/docs/build-nitro/errors#401-unauthorized title: Unauthorized status: 401 detail: Missing or invalid Authorization header instance: /sign/envelopes properties: type: type: string description: A URI reference that identifies the problem type title: type: string description: A short, human-readable summary of the problem type status: type: integer format: int32 description: The HTTP status code detail: type: string description: A human-readable explanation specific to this occurrence instance: type: string description: A URI reference that identifies the specific occurrence extensions: type: object additionalProperties: {} description: Additional problem-specific properties ContentTooLargeProblemDetail: type: object description: Content too large error details example: type: >- https://developers.gonitro.com/docs/build-nitro/errors#413-content-too-large title: Content too large status: 413 detail: Uploaded document exceeds the file size limit of 20Mb instance: /sign/envelopes/envelop-123/documents properties: type: type: string description: A URI reference that identifies the problem type title: type: string description: A short, human-readable summary of the problem type status: type: integer format: int32 description: The HTTP status code detail: type: string description: A human-readable explanation specific to this occurrence instance: type: string description: A URI reference that identifies the specific occurrence extensions: type: object additionalProperties: {} description: Additional problem-specific properties UnsupportedMediaTypeDetail: type: object description: Unsupported Media Type error details example: type: >- https://developers.gonitro.com/docs/build-nitro/errors#415-unsupported-media-type title: Unsupported Media Type status: 415 detail: 'The provided media type is not supported: application/pdf' instance: /sign/conversions properties: type: type: string description: A URI reference that identifies the problem type title: type: string description: A short, human-readable summary of the problem type status: type: integer format: int32 description: The HTTP status code detail: type: string description: A human-readable explanation specific to this occurrence instance: type: string description: A URI reference that identifies the specific occurrence extensions: type: object additionalProperties: {} description: Additional problem-specific properties InternalServerErrorProblemDetail: type: object description: Internal Server Error details example: type: >- https://developers.gonitro.com/docs/build-nitro/errors#500-internal-server-error title: Internal Server Error status: 500 detail: An unexpected error occurred instance: /sign/envelopes properties: type: type: string description: A URI reference that identifies the problem type title: type: string description: A short, human-readable summary of the problem type status: type: integer format: int32 description: The HTTP status code detail: type: string description: A human-readable explanation specific to this occurrence instance: type: string description: A URI reference that identifies the specific occurrence extensions: type: object additionalProperties: {} description: Additional problem-specific properties securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT ````