Note: The Nitro Sign app listed in the Dropbox App Center is being discontinued from Feb 18, 2026. As a result, opening files, self-signing documents, converting PDFs, organizing and optimizing files directly from Dropbox using Open with Nitro will no longer be supported.
You can still connect Dropbox to Nitro Sign using the cloud storage options within Nitro Sign to upload files from Dropbox and copy back to Dropbox.
Still Supported (via Nitro Sign)
No Longer Supported (via Open with Nitro from Dropbox interface):
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Opening Dropbox files directly from Dropbox
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Self-signing documents
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Converting PDFs to DOCX, XLSX, or PPTX
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Organizing files
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Optimizing files
Use Dropbox with Nitro Sign
You can continue to work with Dropbox files by using the built-in cloud storage integration in Nitro Sign.
Upload files from Dropbox
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Sign in to Nitro Sign
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When uploading a document, select Dropbox as the cloud storage source
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Choose the file you want to upload from your Dropbox account
Save files back to Dropbox
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Complete your actions in Nitro Sign
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When saving or downloading the file, select Copy to Storage then Dropbox
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Choose the destination folder in your Dropbox account
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Your file will be saved to Dropbox and available for access there
Visit our User Guide articles, for more information on how to upload and save files.