Custom layout and background image

We have updated our tech note on how Sprend Pro users can add a custom layout and replace the background image.

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Sending to multiple recipients

We have updated Sprend to allow for sending a file to multiple recipients. This is available to all our users with a paid account, Sprend Pro.

Register to test Sprend Pro for 5 days at no cost.

The full list of changes are:

  • Sprend Pro users can send a file to multiple recipients (max 100) and the upload page has been modified slightly to support this
  • Multiple recipients can be entered in the single-line input field which also can be toggled into a multiple-line input field for easy copy and paste of addresses
  • The file is not removed after download but is available for the whole storage period of 21 days
  • History of sent files has been adapted to handle multiple recipients
  • It is not possible to use pin code if number of recipients is more than one
  • A file can be downloaded a max of 50 times per recipient
  • Sprend can now be accessed via a secure connection (SSL)

Many thanks for your support!

Posted in new release | 15 Comments

Upgrade Jan 18, 2012

Today we have deployed a minor update.

  • Pin codes are now 6 characters
  • Improved pin code generation algorithm
  • Added “Send file” to menu displayed when logged in


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Upgrade Dec 1, 2011

Today we upgraded the Sprend platform:

  • Files are now kept 2 hours from first download instead of being immediately deleted
  • Warning if user clicks a link that would interrupt an ongoing upload
  • Validate format of e-mail address
  • Help and about pages have been moved to our blog
  • Many preparations for Sprend Pro and other minor improvements
  • Possibility to apply minor updates without service downtime

There will soon be more!

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For The Historically Inclined

This is how Sprend looked for years before we changed the layout in October 2011. Anno 2004 was the year when Sprend saw the optical fibre of the Internet light up for the first time (the name at that time was

Sprend Original GUI

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Sprend has been updated

A few weeks ago Sprend initiated a cooperation with Infoflex Connect and FileCentral. We are now making some changes to improve the user experience and quality of the service:

  • New internet connection with better stability and capacity
  • New hardware
  • Updated layout
  • Many internal improvements

And there is more to come…

Please give us your feedback either as a comment or on our “Feedback” page on

Posted in new release, system | 4 Comments


This post has been turned into a page: FAQ

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Future of Sprend

I’ve had the goal of making the Sprend project more open and transparent. But writing blog posts takes a lot of effort so I’ve hesitated. Let this be a new start. With a little luck from now on I’ll write more often, but perhaps my thoughts might not be as well pondered as those of Paul Graham.

Internally we’ve had discussions on our mailing list and irc channel about the next step. A new thing is our Facebook page thanks to Börre. I not particularly fond of the all-u-can-eat, we-are-the-internet kind of goal that Facebook has, and I canceled my account some time ago. But perhaps I can change my mind.

Now for the meat. This is my view of the future. The focus for Sprend (as soon as I’ve managed to amass enough cash to support myself for a few months) is to build a first commercial version. And no, we won’t kill the free version in the process. 

The goal is to build a premium service with as little as possible of new functionality, with the simplest way of charging money (simplest to implement for us), and having a reasonable chance, in case of trouble, to bring back files of paying customers, with at most 2-3 hours downtime. The new functionality: multiple recipients and downloads, new field for sender’s email address (= pretty much the top items of

We will do this according to the KISS principle, as simple and as cheap as possible. At least we need to do the following:

  • Design and implement the premium service.
  • Solve problem 1: Our connection to the internet is down. How do we solve this for paying customers within 2-3 hours?
  • Solve problem 2: Our server is down (for whatever hardware or software related reason). How do we solve this for paying customers with 2-3 hours?
  • Solve problem 3: When the load of our free service affects the performance of the payed version, how do we make sure that the paying customers get to their files?
  • Will we be ready for so much more support calls and emails?

I have most certainly left out a number of important issues. But this is a start. What do you think, team?

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Facebook and things to come

Sprend now has a Facebook page:

It’s in norwegian, because Børre – our norwegian guy – created it.
But we’re in the process of transforming it into english, because that’s our default language when communicating with the world (we often use swedish and norwegian when appropriate though).
It has a nice visual design, so kudos to Børre’s work.
Next year we have some improvements planned.
  • A more modern user interface (the “look” of the website)
  • The most requested features at
  • Backend (server) upscaling, to increase speed, reliability and recovery of deleted files
  • A pay-for premium version that will have more features, speed, reliability and security
Posted in networking, new feature, platform | 1 Comment

More stats on our traffic

It’s half a year since I published some numbers on the growing traffic of our server.
That growth has largely “flatlined” (levelled off) the last weeks, mainly because we reached the maximum capacity of our internet connection (during our peak hours of visitors) a long time ago.
But also the growing amount of disk IO and CPU & threads that Tomcat consumes does strain the server itself.
Anyway, here are the numbers as of 2010-10-10:
(The date 10/10/10 = 101010 = 42 in binary = The Ultimate Answer) :)
  • Around 120-170 ongoing file transfers at peak hours
  • Around 300,000 visitors (130,000 unique visitors) per month
  • Around 260,000 successful file transfers per month
  • Around 25 TiB (terabytes) of file transfers per month
  • Around 800 GiB of user data, spread out on 8,000 files, is constantly in our storage
  • The filetransfers consist of 58% uploads and 42% downloads (hey, 42, that’s nice!)
  • Around 17% of uploads and 8% of downloads fail (these are not included in the 260,000 figure)
  • Around 88% of the visitors are from Nordic countries (82% from Sweden + 6% from the others)
Edit: See comment #4 of this post for updated statistics.

Regarding failed file transfers:

Sprend uses HTTP GET and POST, and we allow people to use any browser.
Neither of those are the best ways to transfer files in a reliable manner (but they are the quick & easy ways).
Click on the screenshot below and you’ll see real statistics (and some of it is interesting stuff that I haven’t talked about here):

(To note of the screenshot: it shows the average percentages over time, while I wrote about Sweden’s current percentage. And Finland’s 1% isn’t visible in the screenshot.)

We must keep this eternal truth in mind though:
“There are lies, damn lies, statistics, benchmarks and delivery dates”
(To which I would add “religion, capitalists and Fox News)
Posted in statistics, system | 4 Comments