Say I have a webapp which executes in its entirety on the client-side. Its purpose is to act as a file conversion utility, for example converting a user's local stored word document into a PDF.

So with the user's permission, the app can read a specified local file and process it, in memory, into PDF format.

How can I get the user to 'download' the result? since the data is held in the browser's memory anyway, I do not wish to upload it to some server.

[edit]

• No flash based solutions
• Expected file sizes to be up to 15mb

Say I have a webapp which executes in its entirety on the client-side. Its purpose is to act as a file conversion utility, for example converting a user's local stored word document into a PDF.

So with the user's permission, the app can read a specified local file and process it, in memory, into PDF format.

How can I get the user to 'download' the result? since the data is held in the browser's memory anyway, I do not wish to upload it to some server.

[edit]

• No flash based solutions
• Expected file sizes to be up to 15mb

• javascript
• html

• 2 You could try giving them a link to the file, with the href pointing to a base-64 encoded data URI, perhaps? en.wikipedia/wiki/Data_URI_scheme – Michael Schuller Commented Jan 23, 2013 at 9:41
• 1 What's wrong about stackoverflow./questions/2897619/…? Should cover your problem entirely. – aefxx Commented Jan 23, 2013 at 9:47
• Was about to agree pletely. But I do not want to use flash at all. And I fear that data URI would be too restrictive - can I encode a 50mb file in a data URI? – willcode.co Commented Jan 23, 2013 at 9:52

1 Answer 1

The solution for my case will be to use the HTML5 FileSaver API.

Perhaps this question should just be closed as it is effectively a duplicate of

Using HTML5/Javascript to generate and save a file

Thanks to aefxx