Fill and sign supported file formats

Last updated on Nov 2, 2026

Learn which file types you can fill and sign using Acrobat on the web.

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Supported file types and file extensions
File types	Supported file extensions
PDF	Adobe Fill & Sign supports most PDFs, but not the following: Secured PDFs: Uploading these will result in an error message about editing restrictions. LiveCycle Designer Forms: Dynamic XFA PDFs will show an error message indicating they are not supported.
Microsoft Word	.doc, .docx
Microsoft Excel	.xls, .xlsx
Microsoft PowerPoint	.ppt, .pptx
Image file formats	.gif, .jpg, .png, .tif,
Rich Text Format	.rtf
Text file	.txt, .odt
Fill & Sign form format	.form

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