since 2000
Opening BLAST Files
The BLAST file type is primarily associated with NCBI BLAST.
What is a BLAST file?
BLAST files mostly belong to NCBI BLAST. BLAST files are output files from the NCBI BLAST tool that contain sequence alignment search results in plain text format.
When you open a BLAST file, you will see information such as:
When you open a BLAST file, you will see information such as:
- Alignment summaries: A brief report listing matches between your query and database sequences.
- Statistical data: Scores, E-values, and other metrics that indicate the significance of the alignments.
- Detailed views: Sections that show which parts of the sequences align and how they compare.
This file is produced by running a BLAST search at the NCBI BLAST website or through local installations of the tool.
Few users know that advanced BLAST options let you customize the output to include additional diagnostic details that aid deep analysis.
Tips:
- Use a text editor that can handle large files effectively.
- Review the summary section at the top to quickly assess search significance.
- Utilize BLAST online documentation to learn about customizing the output format.
How to open BLAST files
You need a suitable software like NCBI BLAST to open a BLAST file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your BLAST file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a BLAST file directly in the browser:. Just drag the file onto this browser window and drop it.
Online BLAST Text Viewer
or drag and drop it here
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How to extract texts from BLAST files or capture a screenshot to PDF, JPG, DOCX, TXT, ...
You can extract texts from BLAST file or capture a preview screenshot using our online BLAST file viewer:- Just click the "Choose your .blast file to view" button on this page.
- After your file is opened in browser,
- click "Save as..." in the menu.
- Then choose the file format (e.g. JPG, PDF, DOCX, TXT, ...) you want.
- Download the converted file.
Programs that open and convert BLAST files:
- NCBI BLAST
See the previous paragraphs to learn more about the main application. BLAST files are often referred to as NCBI BLAST simple text files because this type of file is primarily created or used by this software.
- Apple II operating system
Technical Data for BLAST File Extension
File classification:
Simple text file
The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.
ProgramID: VNTIBLASTRawResponse
EXEFile: %ProgramFiles%\Informax\Vector NTI Suite 9\BlastViewer.exe
EXEFile: %ProgramFiles%\Informax\Vector NTI Suite 9\BlastViewer.exe
ProgramID: VNTIBLASTRawResponse
EXEFile: %ProgramFiles%\Invitrogen\Vector NTI Advance 10\BlastViewer.exe
EXEFile: %ProgramFiles%\Invitrogen\Vector NTI Advance 10\BlastViewer.exe
a blast text-based output file from a BLAST search is a special file format and should only be edited and saved with the appropriate software.
How to solve problems with BLAST files
- Associate the BLAST file extension with the correct application.
- Update your software that should actually open text-based output file from a blast searches. Because only the current version supports the latest BLAST file format. Search, therefore, e.g. on the manufacturer website after an available NCBI BLAST update.
- To make sure that your BLAST file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
- Click here to open your .BLAST file online - secure, fast, and no downloads needed.