Document Tools
Merge DOCX API Overview
The Merge DOCX API allows users to combine multiple Word documents into a single DOCX file.
Some key features of the Merge DOCX API include keeping the original formatting of every merged document, separating documents with a section break or a page break, and updating page numbers and tables of contents to match the combined result. Password protected documents are supported, and legacy DOC files can be mixed with DOCX.
This API is useful for assembling contracts, reports, and generated documents into a single Word file as part of an automated workflow.
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Customizable Parameters
Fine-tune your automation with these powerful conversion options
Files
File Supported formats: .docx .docFiles to be converted. Value can be URL or file content. If used in query or multipart content parameter must be suffixed with index e.g. Files[0], Files[1], Files[2]...
Password
StringSets the password to open protected documents.
BreakType
Collection Default: sectionSets the break inserted between merged documents. Section keeps each document's own headers, footers, page size, and margins. Page starts each document on a new page. None appends documents without a break, so the content flows continuously.
Values: section page noneKeepSourceFormatting
Bool Default: TruePreserves the original fonts, styles, and paragraph spacing of every merged document, the same as the Keep Source Formatting paste option in Word. When disabled, merged documents are restyled with the styles of the first document.
UpdateFields
Bool Default: FalseUpdates page numbers, tables of contents, and cross-references after the merge, so they reflect the pagination of the combined document.
StoreFile
Bool Default: FalseWhen the StoreFile parameter is set to True, your converted file is written to ConvertAPI’s encrypted, temporary storage and made available via a time-limited secure download URL, valid for up to 3 hours. After this period, the file is permanently deleted.
When StoreFile is set to False, conversion happens entirely in-memory. The raw file bytes are streamed back in the API response without touching disk or external storage, ensuring maximum security and zero persistence so that only you can access the content.
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