Use this software to convert NEF to JPEG for free. Add a file, or add a folder to batch convert RAW to JPEG. Choose an output folder, click on Convert to begin the conversion. Other image format images can be obtained as well, like: BMP, PNG, GIF, and TIFF. NO other advanced options are available on this free RAW to JPEG converter. CHK file: Saved File Fragment. Read here what the CHK file is, and what application you need to open or convert it. If you are seeking information about file extensions, then you are in the right place at right time.
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My apologies for the length. Just trying to give enough info about the problem.Recently I tried to move my photos from my sd card to the computer hard drive.
When I put the card into the reader the chkdsk window showed up and, instead of going on without the scan I selected to do the check.The result was that many photos were moved to a hidden folder. The photo files are now in chk format instead of jpg.In addition, the folder that contained the photos has been converted to a 32KB size FILE of unknown type.I have tried freeware recovery or restoration softare but the attempts were totally unsuccessful.Can anyone help with this? I can't afford losing those photos.P.S.: My operating system is Windows Vista home premiumPS2: sorry for categorizing it in general hardware. I saw the mistake after havind done it. Are the pics viewable in the camera?
May need to use it to transfer images.It sounds like the sd card is going bad. Recovery software really screws those flash devices up.
Once they are gone, that's that. There is no partial information to build on / recover.
A bad spot is forever bad. Formatting will not repair this device to a dependable state. It will tell you it did (don't believe it!)Those images with the chk extender, change the chk to jpg.
You may get a portion back.Get ready for the viewer to act-up. Broken files can cause issues.Sorry to say, you are going to loose photo's.
How many is the question. First of all, thanx for the immediate response.No, the pics are not viewable in the camera. Of course, that is after the chkdsk.
Before I could see everything in the camera.I already tried to change the chk to jpg by renaming and by using the command mode. The files became jpg but the source data could not be recognized.After the chkdsk the file that previously contained the photos was canverted to the 32KB file I mentioned in the first post. Is there any way to re-convert it to a folder?I insist on that question 'cause I sense that this conversion is responsible for the 'blank' jpg files i get.
I tried Recuva as OtheHill suggested but had no result. It showed photos which I have moved to an external hard disc and thus already have. It didn't help me with the photos I have lost.What is interesting is that, of the total size of the sd card (15GB), the free space is only 13,4GB. The remaining 1,6GB contains the chk files that were previously photos. It seems that all the photos' data is stored in the sd card in an unaccessable format and of course the problem of the file thar once was a folder still remains.All hope is gone??? This is a very long shot (which means it's unlikely to work) but.I use a viewer called IrfanView.
Once or twice in the past I have asked it to Open a dud file and it has either managed to read it somehow (which I then resaved) or has offered to open it as some other picture file. So, if you ran your either your chk files or jpg converted chk files on it you might just be lucky, although I rather doubt it.Most likely the chk files are just parts of files.EDIT:Found this (CHK-Mate). No idea whether it will help but it looks promising.
It's on the freeware list after you click 'Download':Please come back and let us know the outcome. Mourning Hall, are you familiar with reading raw data from disks? You will need a disk editor to do this. Not for the faint of heart. You can toast the medium (disk or stick) in a keypress.
You will need to know your image size in bytes, sector allocation of the memstick (how many bytes / sector), and the tag used by the image format they were saved in. Your puzzle could possibly contain however many found files you have. So now the question, How important are those images? Takes a lot of time to reconstruct from raw data.
You'll have to recognize it as data (numbers), not an image. The result will be the image if all the parts exist. It is possible you could be wasting your time.You'll have to copy the found.000 directory to a working medium. Never do this on the original.I'll check back in as time allows. @Derek: I tried Irfanview but A) it didn't open the jpg converted chk files and B) the ck files were not even visible to it when I went to the folder to select them.I have already tried chk-mate when I searched for freeware chk conversion software. It didn't work either.Yes, it is likely that the chk files are only parts of files.
However the chances are 50-50, because each chk file's size is an actual photo size (that is, when it still was in jpg format). I don't know yet if thecontent of the chk file is a whole file or just a part or something fragmented [email protected]: yesterday I googled the folder issue and found instructions that were posted 1,5 year ago.
The tutorial describes also the use of a program that must be a disk editor, as you recommended.I read the risks and have not tried it yet. I also have installed the program and copied the sd card contents to a usb flash drive (the working medium you suggested)I haven't read the whole tutorial yet (not enough time to do it at once). I send the link in case someone is more familiar with that kind of procedure:I am anything but familiar with reading raw data. I have reached further than I thought I could, but still don't know much.
In fact, I am not even quite sure where to find the sector allocation and the tag used you refer to. When you read the file for an image (raw) the first set of bytes is the file type:Read a good image to see how the raw file appears. Now you have an idea of what you are looking for. Look at the beginning and the end of the file.Once you identify that header in a chk file, you have found the beginning of an image. More than likely, the end of the image will contain zero's or 255's as filler for the sector, but anything is possible.
Hopefully, the characters are the same for easy recognition. If you can't find the header blocks, 1 for each image, it's not worth continuing unless you REALLY like a puzzle challenge.
You can insert them (image file headers) and write the file back to disk, then open with a viewer. You will end up with partial images that are 'broken'. Maybe you can paste them together. If the sd card has never been used before, it makes it a bit easier. If it has been used and erased, you may have a lot of 'noise' to sort through.You seem to have the patience and knowledge to do this. Lots of trial and error for anyone attempting this.
You may want to get more information on the technical part of the image format for the camera. Nothing wrong with copy and paste into those raw sectors to get headers in there if missing.I hope you are very lucky! Mourning HallIf you try editing the files make sure you work on 'copies' of them in case they get worse.Sorry, when I mentioned IrfanView I meant that you change the file extension from.chk to.jpg otherwise, as you say, it won't even see them. It's OK to do this in Windows.
Chances are it still won't read them but it only takes a sec to try if Irfan is still onboard. The only reason I'm mentioning this is because I have had faulty pictures that only Irfan can handle.If you should somehow manage to edit a copy file, then Irfan might still bethe only thing that touches them if they are imperfect. In which case you get Irfan to resave the file and that will clear up the loose ends.Always pop back and let us know the outcome - thanks.
Did your computer fail to open a CHK file? We explain what CHK files are and recommend software that we know can open or convert your CHK files.
What is a CHK file?
The .chk file extension is most commonly associated with the Sophos Anti-Virus software application. The CHK files that are used by the software contain database files that reference different software reporting features and configuration settings.
The .chk file extension is also associated with Windows file fragments. These file fragments are fragments of files that have been cleaned from the hard drive by the ScanDisk or CHKDISK disk checking applications.
The ScanDisk and CHKDISK checking applications are run by the Windows operating system to find errors that may be located on the hard drive. These errors are then written out as CHK files. Oftentimes these files can be removed, as the information contained within them is also stored elsewhere on the user's computer.
Software that will open, convert or fix CHK files
Try a universal file viewer
Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.
About File Extension CHK![]()
File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.
If you have additional information about the CHK file format or software that uses files with the CHK suffix, please do get in touch - we would love hearing from you.
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