Windows
Compatible applications
Quick Facts
Basic information about this file format
Extension
.ORC
File Type
Optimized Row Columnar
Category
Data
Best first step
Use compatible software
Quick Summary
A practical overview of the .orc file format
ORC (Optimized Row Columnar) is a self-describing, type-aware columnar file format designed for Hadoop workloads. It is optimized for large-scale data processing and storage, offering significant improvements in performance and storage efficiency compared to traditional row-based formats like CSV o…
File extension
.ORC
File type
Optimized Row Columnar
Category
Data
Recommended action
Open with a trusted compatible app
How to open a .orc file
Start with a trusted app that supports this format
- Check the file extension carefully and confirm that the file name really ends with .orc.
- Use software that supports this file type. If one app does not work, try another compatible program for the same platform.
- Update the application if the file was created by a newer version of the software.
- Scan files from unknown sources before opening them, especially documents, archives, scripts, installers, and executable files.
What is a .orc file?
File extension details and usage information
ORC (Optimized Row Columnar) is a self-describing, type-aware columnar file format designed for Hadoop workloads. It is optimized for large-scale data processing and storage, offering significant improvements in performance and storage efficiency compared to traditional row-based formats like CSV or text files. ORC files store data in a columnar format, which allows for efficient retrieval of specific columns without reading the entire row. This is particularly beneficial for analytical queries that only require a subset of the data. The format also supports various compression techniques (e.g., Zlib, Snappy, LZO) to reduce storage space and I/O overhead. Furthermore, ORC files include metadata such as statistics about the data within each column, enabling query optimizers to skip irrelevant data blocks and further improve query performance. ORC is widely used in big data ecosystems like Apache Hive, Apache Spark, and Presto for storing and processing large datasets.
Software Compatibility
Programs that may open or work with .orc files
macOS
Compatible applications
Linux
Compatible applications
Mobile
Mobile applications
No specific software is listed for this platform yet. Try checking the file source, identifying the original application, or using a trusted universal file viewer when appropriate.
Can .orc files be converted?
Options for saving or exporting this file to another format
In many cases, a .orc file can be converted by opening it in compatible software and using an option such as Save As, Export, or Convert. The available output formats depend on the file type and the application used.
- Use the original software that created the file when possible.
- Check whether the application supports exporting to common formats.
- Be careful with online converters when working with private, business, or sensitive files.
- If conversion fails, the file may be corrupted, incomplete, encrypted, or not actually a .orc file.
Why can't I open a .orc file?
Common reasons this file type may not open correctly
Wrong software
The file may require a specific program that supports the .orc format.
Incorrect extension
The file extension may have been renamed manually, even though the actual file format is different.
Corrupted file
The file may be incomplete, damaged during download, or transferred incorrectly.
Outdated app
Your software may need to be updated before it can open newer versions of this file format.
Frequently Asked Questions
Common questions about .orc files
To open a .orc file, use software that supports this file format.
- Apache Hive
- Apache Spark
- Presto
- Dremio
- Trino
Open the file in compatible software and look for options such as Save As, Export, or Convert. If no export option is available, the file may require a specialized converter or the original application that created it.
- Verify that the file extension is correct.
- Install or update compatible software.
- Try another application that supports this format.
- Check whether the file is corrupted, incomplete, or encrypted.
A file extension alone does not guarantee whether a file is safe or unsafe. Only open files from trusted sources, scan unknown files before opening them, and be especially careful with executable, script, archive, and document files.
File safety tips
Use caution with unknown files
Only open files from trusted sources. Before opening a .orc file, scan it with antivirus software, verify that the file extension is expected, and avoid running unknown executable, installer, macro-enabled document, or script files.