Excel for Office 365 Excel 2019 Excel 2016 Excel 2013When Microsoft Excel detects a corrupted workbook upon opening, it automatically starts File Recovery mode and attempts to repair the workbook. If File Recovery mode doesn’t start, try using this manual process to recover your workbook:.Click File Open.Click the location and folder that contains the corrupted workbook.In the Open dialog box, select the corrupted workbook.Click the arrow next to the Open button, and then click Open and Repair.To recover as much of the workbook data as possible, pick Repair.If Repair isn’t able to recover your data, pick Extract Data to extract values and formulas from the workbook.If neither automatic nor manual repair works, there are some recovery methods that might help salvage your data. You can also take some preventive measures to avoid losing your work by automatically saving a backup copy of your workbook or creating a recovery file from time to time.Recover data from a corrupted workbookChoose one of the following methods to help recover your data. If it’s not successful, try another method. You can also try third-party software solutions to try to recover workbook.
Important: If a disk error or network error prevents you from opening a workbook, move the workbook to a different hard disk drive or a local disk before trying any of the following recovery options.
OfficeRecovery Online is a breakthrough cloud-based service that significantly cuts the time from encountering a file corruption disaster to complete recovery. The service provides a simple form to upload a corrupted file for repair. Select “All Files” from the Files drop-down menu and select the “PDF Filename” of the file you think is corrupted. Click “Open” and then click “OK.”.
![Repair Repair](http://static.3ice.hu/images/Word-document.xml-is-damaged-beyond-repair.png)
First things first, what is repair and what is recovery?Corrupt are often mixed up. Recovery: Meaning getting lost or deleted files back from for example a memory card. Maybe the card itself (the file system) is corrupt or the card was accidentally formatted. Repair: Repair existing JPEG files that can not be opened in image viewing or image editing software, or that appear to be corrupt when viewing them (colors off, shifted pixels etc.).
You can see the file in the Windows Explorer but there is something wrong with the file itself.JPEG RecoveryWe speak of recovery when you need to get access to files that are no longer visible in the file system. They were deleted, wiped from a formatted drive or otherwise lost (RAW file system for example).For these situations you typically use Photo or Digital Image Recovery software. This is ‘specialized’ software. But you might as well use or undelete software. Photo Recovery tools are often (but not always) either ‘dumbed-down’ generic file recovery tools or RAW scanners.
The latter are also known as ‘carvers’ or ‘file carving software’.By ‘dumbed down generic file recovery or undelete tools’ I mean that it is a generic file recovery tool. However the manufacturer simply limits the software so it only recovers certain file types, such as digital images.It is confusing that many companies selling recovery software will use terms like ‘recover corrupt JPEG files’, suggesting that their software can somehow fix corrupt JPEG and other files. JPEG RepairCorrupt JPEG files are the files you can actually see in Windows explorer, but there is a problem opening them in a photo viewer. So, the files are not deleted or otherwise lost. The photo viewer may simply be unable to open the file at all.
Or it opens the file but shows a distorted image.It appears obvious that in this case you will need JPEG Repair Software or a JPEG repair Service. However, this is not always the case. Assume for example JPEGs are visible though inaccessible due to file system errors, e.g, the file system returns the wrong clusters when trying to open a JPEG. In this case file repair does not make sense, instead it’s a better idea to ‘recover’ the JPEGs using a JPEG carver.
Howto fix with step by step:Repair of a JPEG photo that can not be opened at all handiest is to use a ‘reference file’. A reference file is a photo shot with the same camera + settings. Double click “jpgrepair.exe”. There is no setup, just a single executable file.
Select the ‘Repair (header) tool. Click the folder icon button and select the JPEGs you need to repair. JPEG-Repair will also ask you to select a reference file. Click “Repair”.
Files that can be repaired are automatically saved. JPEG corruption after recovery or undeleteWhat I also see a lot is that JPEG or other digital photos are corrupt after using photo recovery or file recovery software. There are a number of possible causes:.
Photo is actually corrupt (parts missing or overwritten). – Can not be repaired, parts are simply missing.
Photos were fragmented. – Can not be repaired, use to recover the files (see below). Bad sectors on source medium: One bad sector accounts for 512 bytes missing. Due to the nature of many digital photos, even a single corrupt byte can result in corruption. – Can often be repaired.
Typical corruption due to bad sectors on source medium after recovery. Repair possible: YesRecovering fragmented JPEGs from memory cardsUndelete or file recovery software can not recover fragmented files due to a limitation of the FAT file system. This is the most widely used file system on memory cards. Photo recovery software can not either because it simply looks for the start and end marker of a file. I did a blog post which explains this in more detail.I explained that such files can not be repaired because part of the file is simply missing. So basically this means you’re out of options.This is however not entirely true! DiskTuna is involved in the development of a unique ‘ called JPEG Recovery LAB‘ that can actually recover fragmented digital photos.
So, if your recovered photos loo somewhat like the first example, it may be a good idea to give our tool a try. JPEG Recovery LAB works for JPEG and some popular RAW digital image formats used by cameras. The same fragmented file recovered by JPEG Recovery LABRepairing corrupt JPEG FilesSo,an often heard complaint is that digital photos are corrupt after recovering them using recovery software. This is mostly caused by parts of the file being overwritten, file fragmentation.
In this case (JPEG) file repair can be regarded.But there are plenty of other reasons for corrupt JPEG files. From the moment of taking the picture to the moment the JPEG file is on your PC things can go wrong. Most files I receive for repair were never lost or deleted. They simply became corrupt somewhere, somehow.For repairing corrupt JPEG files there are multipleoptions:.
Use JPEG Repair software. JPEG Repair software promises to repair corrupt JPEG files more or less automatically. Send the corrupt JPEGs to a JPEG Repair Service. Try to repair the files yourself using a hex editor.First check you can do to determine recoverability.There is a quick first check you can perform using a hex editor to see if JPEG files can be repaired at all:I use. You basically want to skim through the file and see if there is data in it.
Every now and then I get sent files that are filled with zeros or a byte pattern like FF FF FF FF etc. If that’s the case then there’s no hope of repairing the file. While there you may want see if the first two bytes in the file are FF D8 and the last two FF D9 (the header and footer of a JPEG file).
Using JPEG Repair Software. His tests are ‘artificial’ but I can only confirm his results after testing some ( and ) of them against real world cases, I get mixed results. Free demo’s are available so it never hurts to try.For example, I was able to repair this image (the moron in the middle is me, so no need to blur that):At first glance it looks like typical file fragmentation damage. But apparently it’s not.
So, never take things for granted, simply try if the demo version is able to show you an intact file! How well do automatic JPEG Repair tools perform? Raymond.cc tested 5 tools. We tested our own using the same method and images. Hint for when using JPEG File Repair Software:JPEG Repair tools may employ multiple methods for repairing your files.
One of them is to extract the embedded JPEG preview file. It is a smaller version of the actual image.
The software may present this as a successfully repaired image! So check the resolution of the file first. If it is a much lower resolution that the original, it’s the preview.
My freeware can extract preview files as well.The same applies to some of the online JPEG repair services (see below) as well. Online JPEG File RepairThere are a number of sources online that offer JPEG Repair.
Some appear to be automated ‘online applications’. They also offer a Windows client. Using the trial I was never able to repair a corrupt JPEG. The ones I tried appeared to be as corrupt as they were before. The only change was that they were now water-marked. Online it showed 7 more images, all slightly different which suggests it has been trying different solutions, one of them being a lower resolution preview.I also tried the free version of and got the same result. The picture marked ‘repaired’ had the same damage as the original.It appears repairs are done by software.
![Corrupted Corrupted](https://www.ibeesoft.com/img/screen/password-online.png)
So, the only difference from trying above JPEG Repair tools, is that the software runs on a remote server rather than on your computer. Manual JPEG Repair ServicesApart from there are appears to be at least one other service where the corrupt JPEG is repaired by an actual human being,.Bottom line is that in many cases repair of corrupted or damaged JPEGs can not be automated. They require the human eye, intuition and expertise. This video shows the various stages of repair of a JPEG file that was sent to me. I ran into all kinds of problems I had not seen before. I as a human being can reason my way through that and try alternatives. At this point software can not do that.