Help & Support

Frequently Asked Questions

This page aims to provide answers for common questions by users and customers. Do you have one or more questions regarding Tweddo that are not on this list, or is your question not sufficiently answered, feel free to contact us! We're happy to help you out.


Please check your spam folder of your mailbox. In some cases the e-mail will be filtered as spam. If you still can't find the e-mail, please contact us at We will send you a download link as soon as possible.
Whether you can use Tweddo for commercial purposes depends on which license you have purchased. Only the Enterprise Edition is permitted to be used in businesses as part of commercial activities. Other versions are simply only allowed for personal use.
All licenses are valid for a lifetime.
Yes, you can. However, most licenses may only have one user at the same time, which means in practice that it may only be activated at one computer at the same time. If in the meantime you want to use Tweddo on other computers as well, then you'll have to buy another license.
Yes, your license is valid for all updates of Tweddo in the future.
Your license wasn't validly used on that moment. This could be caused by two things: (a) You've just activated your one-user license on another computer, or (b) Your license is (unfairly) accused of piracy or abuse. Please contact us at and send your license information, so we can tell you more about the cause and how we can help you out.
Please contact us at Send us an e-mail with the name and e-mail address you think you've used when ordering your license, and which type of license it concerns. Then we will send you your license information again.
Make sure that all the information is entered correctly. Pay attention to any uncommon characters, spaces, tabs, etc. All the fields should exactly match your license information. If it still doesn't work, please mail us at and we will help you out.
You can activate your license by starting up Tweddo. Then, in the Help menu, you can find the Add License menu item. Click this item and the license popup will appear, where you can fill in your name, e-mail address and serial key that you've received as part of the license information in your mailbox. Make sure that each field in the popup exactly matches its corresponding license information field.


Our payments are handled by FastSpring, which is a reseller in California, USA. They accept the following payment methods, dependent on the country you're living in: Credit cards (VISA, MasterCard, American Express, Discover, JCB), PayPal, Amazon Payments, Check or Money Order, Giropay, iDEAL, Sofort, WebMoney, and Alipay.
There are no (hidden) additional costs or recurring costs. There is only a one-time payment for the license you want, nothing more.
No, you're not bound to a contract.
We're very sorry that you're unsatisfied with Tweddo. If you really want a refund, you can send us an e-mail with your order information at within 14 days after the payment. We will then refund your money as soon as possible.


We currently support Windows (XP, Vista, 7, 8, 10) and OS X Mavericks (10.9+).
To use Tweddo on your computer, the minimum requirements depend on your use case. When you want to process large images, it requires a lot more memory and CPU power. In general however, it is recommended to have at least 2 GB of memory to run smoothly. The application is smart enough to switch over to disk memory when there is not enough working memory left for Tweddo to use.
In the Help menu, you can find the Add License menu item. Click this item and the license popup will appear, where you can fill in your license information.
Currently Tweddo is only available in English.

Curiousity simply kills me...

The name Tweddo is a combination of two components: Twente and Reddo. Twente is the region the company where Tweddo is localized, and Reddo is Latin for restoring and repeating. We thought it would be a nice combination.
Tweddo originated in October 2016 due to a struggle in digitising a home archive of photos, including over 4000+ of photo negatives (35mm film and 16mm film) and printed photo material. An expensive flatbed scanner was purchased, with the capability of scanning infrared to automatically correct dust and scratches.

However, as the perfectionistic founder of Tweddo was unsatisfied with the way raw scanned image files were supposed to be saved in an enhanced and modified state, there would have been no way of returning to the originals in the future.

Now imagine that you're halfway into scanning project and you eventually find out that you've enhanced your photos incorrectly. Then you have two options: you should scan all the affected material again, or you simply accept the bad outputs... None of the two were an option, so a third option was created pretty quickly: making your own tool. And so Tweddo was born!


Tweddo is a multi-purpose batch photo editor specialized in the enhancement and restoration of large collections of photos. It should be considered as an alternative for the manual operations in your regular photo editor to process your photo archive. Beside the specialization, it is also your regular image batch processor, fulfilling your basic image processing needs such as resizing, cropping, rotating, converting, watermarking, etc. As Tweddo consists just of programming code compiled to a binary executable in the form of a set of bits, it would be physically impossible to eat. If you still find a way to eat it, we would still not recommend it. Although we can already guess what it tastes like...
Processing jobs are at the core of the application, and gives you the possibility to do something with your set of images. Each processing job has its own specific purpose. We split all the functionality for you in these jobs, and now it's up to you to sequence them in a job list that is finally executed when processing the set of images.
The image output of Tweddo are certainly just as qualitative as the result of comparable operations in other popular photo editors like Adobe's Photoshop or GIMP. We put quality first since day one of development. We understand that when you're working with sensitive photo collections and archives, it requires the best care in the world to get the most out of it. Therefore we've put in a lot of work to make the output state-of-the-art, and even outperform others on the quality aspect. So in short, you shouldn't worry about that!
Tweddo is different from other batch photo editors in that it offers a toolset to further enhance and restore large photo collections. It has specific processing jobs others don't, such as infrared cleaning (also known as Digital ICE), automatic color correction, removing of color casts, advanced automatic trimming of photos, fixing negative the right way, et cetera. Besides that, it is high performant, handling large images with ease, offering you a great deal of flexibility, and has an amazing set of processing jobs to play with.
To speed up processing jobs in Tweddo, we built in support for multiple CPU cores. If your CPU has multiple cores, we take advantage of that and run certain operations in parallel so it is finished earlier. Although not implemented for all processing jobs, we're still working on implementing it for others.
The maximum number of images you can process with Tweddo is actually up to how much your system can handle. So technically, Tweddo doesn't limit the number of images you can process, but maybe your disk storage or memory will.
Tweddo supports reading and writing to all popular image formats, including BMP, JPEG, JPEG 2000 (JP2), PNG, GIF, TIFF, ICO, TGA, and PSD. All popular RAW image file are supported for reading only, including ARW, CR2, CRW, DCR, MRW, NEF, ORF, RAF, and X3F. In the future, Tweddo aims to support even more image file extensions! If you have a request for another image file format, feel free to contact us at!
The maximum of images Tweddo can handle are only limited by your own system. This means we don't apply theoretical limits within the application.
Yes, we do! In fact, with the alpha channel you can do some additional amazing stuff in specific situations. For instance, when you're scanning photo negatives using e.g. a flatbed scanner, you can scan in infrared additionally if your scanner supports this. This is then saved in the alpha channel and can then be used to further remove dust and scratches detected by the infrared in the primary RGB image in Tweddo.
Yes, Tweddo does support animated GIFs. Most processing jobs will work as aspected. However, as Tweddo is focused on photo enhancement and restoration, some of the advanced processing jobs will not work as expected. Unless there is great short-term demand for this feature, it won't be available in the near future.
No, currently Tweddo doesn't support vector images such as EPS or even PDF. As Tweddo is focused on photo enhancement and restoration, we decided not to include support for it in the near future. We will change our minds, of course, if there is great short-term demand for this feature. If you want us to support animated GIFs, please contact us at!
Yes and no. Digital ICE is a trademarked licensed set of techniques introduced by Kodak, famously known for automatically correcting dust and scratces through the infrared image channel. We're simply not licensed to use it. So instead we invented our own! In fact, we are convinced that it generates even more qualitative outputs. So why not try out our own infrared cleaning processing job?


There are three ways to add images to your processing queue. First of all you can simply drag and drop images from your file explorer to the application. Furthermore, you can add images by using the Add Images menu item and select one or more images. And lastly, if your license supports it, you can also import complete folders of images by the Add Folder menu item. Tweddo will then search the whole folder for all images, optionally in a recursive manner and filtered by the image types you want to include.
Yes, you can save your current job list for later usage. If you have the right license, you can simply use "File > Export Job List" and save your job list as a .jxml file. When you're ready to use it at another time, simply use "File > Import Job List" and select your file again.
Your previewer can be disabled manually in the "View > Disable Previewer" menu. We included this future for the low performant computers that are running slow with the previewer turned on. Anyway, if this menu item is turned off, simply try turning it on again and see if that works. If your output previewer still doesn't work, then this should be considered a bug. We would very much appreciate you reporting this bug to, eventually with the steps taken to generate the event, so we can fix the bug for a next update.
The comparison split view can be controlled by the buttons at the bottom of the output previewer. Each controls its own layout, for which "A" stands for displaying the "before" image, and "B" for the "after" image. Currently there are six options. The default selected view is the "after" image (B), but you can select the "before" image by using the button that says "A". The other buttons simply control splitting the before and after images horizontally or vertically.
Additionally, you can also control which kind of before and after image are displayed. This can be done by disabling/enabling previewing the final before/after images in the "View" main menu. For instance, for the after image, you can choose whether to show the very final after image (previewing the output after running the last job in the list), or just showing the output preview after the current selected job. The same can be done for the "before" view. This way you can make direct changes done by the selected job more visible.

Photo collection processing

This is a question that cannot be answered in a short manner. Without getting into details, it basically comes down to a workflow with the following sequenced activities: (a) Sort your photos and/or negatives in way that is most appropriate to your situation; (b) Scan your photo materials without enhancement; (c) Analyse the state of your photos and make generalized processing job lists in Tweddo for them; and finally (d) Run the preprogrammed job list in Tweddo for the selection of photos. Eventually there is also a last step, which includes aftercare concerning making backups, and providing accessibility by creating a channel to share the digital photos with other stakeholders (family, friends, etc.).

The main benefit of using Tweddo in this workflow is that you can split your scanning/enhancement activity to two different moments in time. This way you can focus on properly scanning your material (which is the most important step, as garbage-in automatically means garbage-out). Furthermore, when you're enhancing your photos on your raw archived files, there is no way in the future you can undo changes you've made there. With Tweddo, you're keeping your scanned files raw, so you can always redo the enhancement process at a later stadium if you want.
Every photo is different and requires its own treatment. The treatment is influenced by many factors, including the level of degradation by aging, method of preservation, type of photo material (printed/negative/positive), quality of the material itself, how it was shot at that moment, what the quality is of your scan, and probably more. Therefore, this question is hard to answer, and many times requires the analysis of your photo material and adjusting your job list to it.
In general, it will be enough to use the automatic color enhancement jobs that Tweddo offers. It analyzes the colors in the image and tries to automatically correct to the original state. Additionally, depending on the type of material, such as printed, photo negative, black and white, etc., you should also add specific processing jobs for them. We've included a couple of general job list templates you can work with, that you can select on startup. These include all the basic jobs that you would need in most situations. Remove or add processing jobs to fulfil your needs. If some of your photos require extra enhancement, you can always make exceptions for them in the job setting configuration.

Bugs or other issues

Although very unusual and probably only happening in specific situations, a crashing application is always very unfortunate and should be considered a major bug. We're of course very sorry when it happens, as we attach great value to quality and stability. There could be many explanations for such incidents, including incompatible system components, insufficient system resources (e.g. not enough memory), or simply a programming error. Anyway, we would very much appreciate you reporting the crash to with the steps taken to generate the event, so we can fix the bug for the next update.
If the application is hanging or running slow, then it is probably busy with some kind of difficult calculation. During the process operation of your images, you should just wait until it is finished. Especially with large images, specific processing jobs may take quite some time to finish. You can consider to run the specific processing jobs on a computer with a faster CPU and/or with more working memory so it will be running faster. Although the CPU is playing a great role in calculating things, insufficient working memory may also be the cause of slow operations. Especially with large images, when there is not enough memory to work with, Tweddo will automatically use available disk storage to use as a memory location. As disk storage can be considered a lot slower than "Random-Access Memory" (RAM) this can cause the system to hang for a while until the operation is finished. In any case, if it is hanging for an uncomfortable long time without feedback within the application, this may sometimes be considered a bug in the application and thus should be fixed in one of the next updates. We would very much appreciate you reporting the hanging to with the steps taken to generate the event, so we can fix the bug for the next update.
Features requests are always welcome and we really appreciate you doing such requests! We're always striving to make the application better, and who else than the user can tell better what should be improved or which features are most welcomed? You can do your feature request just by e-mail at We will respond as soon as possible, and consider your feature request for one of the following updates.
Bugs are very unfortunate and in many cases very annoying or even blocking. We attach great value to stability of the product, so we would very much appreciate you reporting these bugs! You can report bugs by mailing to with the steps taken to generate the event, so we can fix the bug for the next update.
Especially in situations where Tweddo needs to do difficult operations on large images, it is required to take up a lot of your CPU power and memory. Unfortunately, there is not much we can do about that. However, we continuously try to optimise the application so it speeds up in the future.
When the previewer is slow, your hardware is having a tough time to calculate the processing jobs on the smaller preview images in the background. As some of the processing jobs are much harder to process than others, it may sometimes be the case that the previewer will run slow as a result. Unfortunately, there is not much we can do about that. However, we continuously try to optimise the application so it speeds up in the future.