I want to sign a file (a picture of 1.4 Mb) with my Ardor Account, in order to have a timestamped proof of ownership. I tried the generateFileToken API, but it seems to work just with smaller files (no more than 40 kb). How could I do it?

1 Answer 1


You need to increase the max file upload size of your node using the nxt.maxUploadFileSize property in nxt.properties.

For example, set:


To set the limit to 10MB

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