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View and edit large files
without performance loss.

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UltraEdit is designed to be an editor and a viewer for large files out-of-the-box. It automatically detects large files and suggests optimal settings to handle it.

It is one of the editors with virtually no limit on file size – easily open, view, edit, and save large text files in excess of 4GB! The only limit is the size of your hard drive.
It is designed to prevent using all available memory, which would stop other applications from running properly.

Testimonials

I’ve been using UltraEdit for years to manage large datasets, and its performance is unmatched. The ability to handle huge files without crashing is invaluable.

Sofia Harries – Developer at AWS

I love how it easily handles large text files.I have a db log file that is several GB, and UE quickly opens the file, and I can search the entire document very easily. It also searches the entire file surprisingly fast.

Nuno C. -Developer

UltraEdit handles my multi-GB log files effortlessly. The search functionality is incredibly fast and efficient, saving me a lot of time.

Vicky B – Developer

Video Tutorials

Tweaking your settings
for large files

Benchmark: large
file performance

Opening a 35 GB XML
file in UE

Another Video
Example

Optimizing the UltraEdit Text Editor to handle extremely large files.

There are several configuration settings that can be configured to optimize the editing of large files. (Most of them can be found in the Large Files under Advanced → Settings → File Handling → Large Files). We will take a look at the following:

1. Disable Temp Files

Disabling temporary files is probably the most crucial adjustment you can make to improve performance when opening very large files with UltraEdit. As a disk-based editor, UltraEdit only loads small portions of the file into memory, minimizing the impact on your system’s RAM.

Disable Temp Files

2. Disable Line Numbers

Disabling line numbers in UltraEdit can greatly enhance navigation and performance, particularly when working with very large files.
Disable Line Numbers

3. Disable Line Terminator Conversion

Line terminator conversion is a feature that ensures consistent line endings within a file, converting Unix (LF only) or Mac legacy (CR only) terminators to the DOS (CR/LF) format.
Disable Line Terminator Conversion

4. Disable Code Folding

Although Code folding is a useful feature for collapsing and expanding sections of code, making it easier to navigate complex scripts and source files…
Disable Code Folding

5. Disable the Function List

The function list feature in UltraEdit is designed to parse and display all the functions in a file, providing a convenient way to navigate through code.

6. Set a Large File Threshold for the XML Manager

The XML manager in UltraEdit provides powerful tools for viewing and editing XML files. However, it requires parsing the entire file to offer features like tree view, validation, and XPath search. For large XML files, this parsing process can be very slow and consume significant system resources.
Set a Large File Threshold for the XML Manager

7. Disable Syntax Highlighting

Disabling line numbers in UltraEdit can greatly enhance navigation and performance, particularly when working with very large files. Line numbers are typically displayed to help users track their position within the file, but calculating these numbers in real-time for large files can be resource-intensive. Each time you scroll or navigate through the file, UltraEdit needs to calculate and display the line numbers, which can slow down the editor.
Set a Large File Threshold for the XML Manager

8. Disable the Line Change Indicator (LCI)

Disabling line numbers in UltraEdit can greatly enhance navigation and performance, particularly when working with very large files. Line numbers are typically displayed to help users track their position within the file, but calculating these numbers in real-time for large files can be resource-intensive. Each time you scroll or navigate through the file, UltraEdit needs to calculate and display the line numbers, which can slow down the editor.
Set a Large File Threshold for the XML Manager

UltraEdit is the most flexible, powerful, and secure text editor. Download a free, full-feature trial to see why. Available for Windows, Mac, and Linux.

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