Do you have a document file, such as a XLSX file, that will not open correctly? If so, our free-to-use XLSX repair tool may be able to help. Our tool analyses the content of your XLSX file and is able to determine if the file structure is valid. Our tool will let you know what is wrong with your XLSX file and attempt to fix it.
Or drag and drop your files here to upload.
A maximum of 20 files can be uploaded at once.
Here are 3 simple steps to repair your XLSX using our fast and free repair tool.
Yes! Our XLSX repair tool is 100% free to use.
No, you can repair as many files as you wish. We do not have any limits when using our XLSX repair tool.
We aim to process XLSX repairs as quickly as possible; this usually takes around 5 seconds; however, this may be longer depending on the file size and data needed to be repaired.
Once your XLSX has been selected, it will undergo some initial checks to verify that the file has some basic information. If the initial checks pass, we then upload the file to our servers for more detailed analysis.
Yes, of course it is! Your XLSX, once repaired, is deleted 15 minutes after upload, and any download link will expire after this time.
Yes! Our XLSX repair tool will run on any system with a modern web browser.
| Extension | XLSX |
| Full Name | Microsoft Excel Spreadsheet |
| Type | Document |
| Mime Type | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
| Format | Binary |
XLSX files have been around since the mid-2000's and are one of the most popular spreadsheet file formats available. It was created by Microsoft as a modern update to the existing Excel XLS file format, with the intention of making future improvements to the format easier to implement than the original XLS format.
Contained within an XLSX file is the spreadsheet data stored within XML files. The XLSX file itself is simply a compressed ZIP container, meaning the format allows for all the Excel assets, such as spreadsheet data, images, and charts, to be stored separately within a single file structure.
As well as being the native format used by Microsoft's Excel application, XLSX files can also be processed by other spreadsheet applications, and third-party conversion tools can easily interface with the XLSX file format.
XLSX files contain a sequence of unique bytes at the beginning of the file. This header section is usually followed by the main XLSX file section. Where the header block is present, our document repair tool will parse the header data to validate the file type and also provide additional metadata that describes key characteristics of the document uploaded.
Microsoft Office formats such as XLSX are actually compressed container formats using the ZIP format as the underlying container. The data for these documents is stored in XML format. With this knowledge, our XLSX tool parses these documents to ensure the underlying XML is correctly formatted.
