Download Emurasoft EmEditor Professional v21.4.1

Emurasoft EmEditor Professional v21.4.1

Emurasoft EmEditor Professional v21.4.1
Emurasoft EmEditor Professional v21.4.1

EmEditor is a fast, lightweight, yet extensible, easy-to-use text editor for Windows. Both native 64-bit and 32-bit builds are available, and moreover, the 64-bit includes separate builds for SSE2 (128-bit), AVX-2 (256-bit), and AVX-512 (512-bit) instruction sets.’s Ed Burnette called EmEditor the “World’s fastest text editor.” Read full review.

Japanese website “Mado-no-mori” remarked “No need for Excel. Most powerful CSV editor.” Read full review (translation).

Riccardo Tani, Cyber Defense Manager, recommends EmEditor for Digital Forensics and Incident Response (DFIR) and log analysis. Read full review.

The text editor supports powerful macros, Unicode, and very large files. Emurasoft’s timeless mission is to achieve our clients’ needs and wants by listening to them with empathy and expertise. We value timely customer support, and are honored to have distinguished users, including major corporations, educational institutions, institutions of the European Union, ministries of Japan, and governments from all over the world.

Syntax highlighting

EmEditor provides syntax highlighting for 20 different languages, including C++, Java, HTML, Perl, Python, and many more. You can also easily create your own customized highlighting rules.


No matter what programming language or file type you prefer to work with, EmEditor offers a dedicated environment for your work. Conveniently select a configuration for your language, including syntax highlighting and a preferred interface, or create your own custom configuration.

Multiple selection editing

With EmEditor’s multiple selection editing, you can quickly make changes at multiple locations in your document simultaneously–use it to rename variables, enter data, and generally make your life easier. Just hold CTRL when making selections to take advantage of this feature.

Compare Documents

EmEditor comes with a built-in compare feature that allows you to view documents side-by-side with synchronized scrolling and highlighted differences.

Regular Expressions

Use EmEditor’s integrated regular expression support to make find and replace operations a breeze. The Find, Replace, Find in Files, and Replace in Files functions each allow you to make nuanced and agile changes to your work using regular expressions.

EmEditor is optimized for handling large files, the kind of files that other editors just can’t handle. Files up to 16 TB can be opened in full using only a little bit of memory. For files even larger than that, EmEditor uses the Large File Controller to moderate how the program handles huge files.
Edit Files up to 16 TB

EmEditor opens up to 16 TB or 1,099 billion lines – whichever is reached first, when opening a file – with only a little memory.

Large File Controller

The Large File Controller enables you to view and edit files larger than 16 TB by opening up one section of the file at a time. You can control which and how many lines are displayed, and view how much memory EmEditor is using.

Split/Combine Files

Easily manipulate your large files with the Split and Combine Files features, which allow you to cut up and put together files for quick and easy editing.


Sort operations are optimized for large files—EmEditor v13 runs a Sort command for a 1,750,000 line file in under 8 seconds.

Multithreaded design

The key to EmEditor’s large file capabilities is its single-process, multithreaded design, which allows EmEditor to execute powerful functionality without compromising speed or taking up too much memory.

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