The safe, secure and completely free way to transfer large files around the Web.

What is ZendTo?

It is a classic problem: you need to send files to someone, or they need to send them to you, and there's no way except email. But they are too large or your administrator won't let you transfer the files by email at all. ZendTo to the rescue!

Why ZendTo?

ZendTo is a completely free web-based system, which you can run on your own server with complete safety and security. It runs from any Linux / Unix server or virtualisation system, there is no size limit and it will send files 50% faster than by email.

Key Features

  • Secure encryption & decryption of uploaded files, using a user-selected passphrase, to protect personal or restricted data
  • Checksums of uploaded files, to avoid disputes over exactly what content was delivered
  • Users are informed of the use and processing of their data, in line with GDPR requirements
  • Very simple to use, supports drag-and-drop selection of files to upload
  • Easy to translate into other languages, and customise for your organisation
  • Integrates with any existing Active Directory, LDAP or IMAP authentication service
  • No hard upload limits (50GB uploads are normal)
  • Automated installer provided for quick installation on any minimal server install of CentOS, RedHat, Ubuntu, Debian, SUSE or OpenSUSE
  • Integrates with existing customer service ticketing systems

Technical support is provided by email or an active mailing list. All completely free.

 

News

  • 10/07/2018 - Production release of version 5.11. Mostly minor additions to resolve issues and missing config options with 5.10. The "OrganizationShortType" setting in zendto.conf should now include "the" on the front, which makes it much easier for many sites to successfully customise the user interface for their company name. The main menu has been cleaned up. The installer now fully supports the cryptography library on SUSE 12sp3 and openSUSE Leap 15, in addition to all the other supported platforms. To upgrade from 5.10, a quick yum/apt/zypper package upgrade should do it. To upgrade from earlier than 5.10, please download and run the Installer as that will automatically do the big PHP upgrade you will most likely need.
  • 02/07/2018 - I have documented the new encryption and decryption feature so you can quickly see what it does, how and why.
  • 29/06/2018 - Production release of version 5.10. The major new features in this release are secure encryption/decryption of drop-offs using a user-supplied passphrase, and a "Download All Files" button to save lots of clicking. To upgrade to this version, please download and run the Installer as that will automatically do the big PHP upgrade you will most likely need.
  • 23/06/2018 - I am getting close to a production release now, including all the encryption features. The ZendTo installer (beta version of it right now) will upgrade your system to the required version of PHP and its modules, without upsetting the rest of your system configuration. Just run it all the way through. I have tested the installer's ability to upgrade on CentOS, RedHat, Ubuntu and Debian. I would be really greateful if people could download and test this for me. See the beta page for more information.
  • 20/06/2018 - Release 5.09-4 beta. This optionally does secure encryption and decryption of drop-offs, has a new "Download All Files" button on the pages that let you download drop-offs, and for those with users in the EU it offers a pop-up asking new users to agree to storing cookies and GDPR consent for using their name and email address. Note the "Download All Files" button does not work (or show) on Internet Explorer. See the beta page for more information, and the Change Log.
  • 01/06/2018 - Release 5.04-6 beta. This has a new "Download All Files" button on the pages that let you download drop-offs. Note it does not work (or show) on Internet Explorer. See the beta page for more information, and the Change Log.
  • 30/05/2018 - Release 5.04-5 beta. There are only security fixes to ZendTo itself. The main point of this release is the beta of the installer now includes support for SUSE Enterprise (tested on SLES 12sp3) and openSUSE Leap 15. See the beta page for more information, and the Change Log.
  • 31/03/2018 - Released version 5.03. The lifetime of a 'request for a drop-off' is now fully exposed to the users. The "About" page text is improved. A security bug has been squashed. Please see the Change Log for details.
  • 27/02/2018 - A couple of minor bug fixes, including an automatic DB schema fix for old MySQL setups. Please see the Change Log for details.
  • 21/02/2018 - Released version 5.02. A few minor bug-fixes, and a new option 'emailSenderIP' which you can set to false which will remove senders' IP addresses and hostnames from any email messages which are sent.
  • 07/02/2018 - Released production version 5.01. The biggest change from Version 5.00 is the addition of a checksum for each file in a drop-off. It also fixes all known bugs in Version 5.00. Please see the Change Log for details.
  • 04/02/2018 - Released 5.01-3 beta. This version adds checksums (SHA-256 by default) for each file in a drop-off, provided the checksum calculation won't take too long. See the Change Log for details. It also fixes the known bugs.
  • 01/02/2018 - Released 5.00-2. The changes to ZendTo itself are minimal, see the Change Log for details. However I have improved the installer so it no longer needs to rebuild PHP at all on CentOS and RedHat 6 and 7 systems, but instead uses stock RPMs that are well maintained by others (Rackspace). To replace your current custom PHP with a stock one, just run stage 2 then stage 5 of the installer.
  • 22/01/2018 - Production release of the major new version 5.00. Please read the upgrade instructions if you are upgrading, there are major changes you need to know about before you upgrade or it will possibly not work. See the Change Log for information about the new features offered in ZendTo version 5.
  • 22/01/2018 - I have just uploaded a set of screenshots of version 5 as it should be released very soon.
  • 18/01/2018 - What I hope may be the final beta of version 5 released. I have fixed the last few bugs that have been reported, or I have found. When showing a drop-off, you now get different icons for different types of file. See the ChangeLog for details. And see the announcement on the next line for more instructions.
  • 12/01/2018 - Another new beta of version 5 released. Many more bug fixes, including for problems with international characters in email messages. See the ChangeLog for details. And see the announcement on the next line for more instructions.
  • 09/01/2018 - New beta of version 5 released. See the ChangeLog for details. And see the announcement on the next line for more instructions.
  • 07/01/2018 - First beta of version 5 released - Please see the ChangeLog for the major new features, and the beta page for instructions on how to get it and use it. Please read carefully!
  • 25/06/2017 - Fixed bug where reminder emails were lacking the server root URL.
  • 27/05/2017 - New beta version of the installer available, now with support for Debian 8 as well.
  • 24/05/2017 - New full production release 4.28-1. The main changes since the last production release are the new "Multi" authenticator to allow multiple simultaneous authentication back-ends, and the HTML emails now look as intended. There are more details in the Change Log. To install, please see the downloads page.
Download ZendTo

 

Download NowVersion 5.11 (10 July 2018)
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Electronics and Computer Science, University of Southampton