We are pleased to announce the release of EmEditor v26.1.0.

In EmEditor v26.0, we introduced support for quickly opening extremely large files that consist of a single line with no newline characters. However, opening such files quickly is only useful if horizontal scrolling and editing remain responsive afterward. In v26.1, we have made additional performance improvements through algorithm changes, SIMD-based optimizations, and other enhancements, making horizontal scrolling and editing much smoother after these files are opened. We have also optimized many operations for large files that contain newline characters. The benchmark results shown in our documentation represent only part of our testing, but they demonstrate performance improvements of 1.34 to 6.06 times compared with the previous version. Many other operations have also been improved for better overall performance.

This release also includes improvements based on customer feedback. For example, when a file opened in EmEditor was modified by another application, reloading the file could fail if the external application had temporarily locked it. In v26.1, EmEditor now waits a few milliseconds before reloading, and if reloading still fails, the message box now includes a Retry button.

When saving multiple unsaved documents, there is an Apply to All option to the “Save changes?” message box. EmEditor now also remembers the initial state of this option.

In EmEditor v25.2 and earlier, sorting a file did not cause the document to scroll if you were viewing the beginning of the file. Starting in v25.3, we changed this behavior so that, after sorting, EmEditor would scroll to the new location of the line where the cursor had been before sorting. Although this was intended to be the correct behavior, we received feedback that it made EmEditor less convenient to use. Therefore, in v26.1, we added the The cursor moves to the correct position when sorting option and restored the original behavior by default. However, when using the Sort by Similarity command, the document may still scroll so that the cursor can move to the correct location.

EmEditor v26.1 includes several improvements to the ChatAI plug-in. In earlier versions, the AI Prompt feature allowed only one provider, such as OpenAI or Google, and one model, such as GPT-4 or Gemini 2.5 Flash, to be used for all prompts. This meant that if you wanted to use different providers or models for different prompts, you had to change the settings each time. In this version, the AI Prompts page in the Customize dialog box lets you choose a provider and model for each individual AI prompt. For example, you can ask the same question in quick succession using different providers or models and compare the responses. You can also set different Reasoning Effort, Text Verbosity, and Web Search options for each prompt.

Makoto Emura added support for the Anthropic provider in the Chat with AI plug-in, in addition to the previously supported DeepSeek, Google, OpenAI, and LMStudio/OpenAI-compatible providers.

The file upload feature, previously only supported with OpenAI, is now also available with the Google provider. Similarly, Tool Calling, previously only supported with OpenAI and DeepSeek, is now available with the Anthropic and Google providers.

We have also added a PowerShell tool to the Tool Calling feature. For example, if you ask, “Show me a list of files with the .md extension in the D:\Test folder,” EmEditor can display a list of Markdown files in that folder. Because PowerShell commands can affect important files, EmEditor displays a Confirm button before executing the command. The command runs only after you click Confirm, helping you use this feature safely.

When you run EmEditor’s Reset All Settings command, all previous Chat with AI history is also deleted. In this version, we have added Chat Import and Export feature. Before running Reset All Settings, you can export your chats to a file, then import them afterward to restore your previous conversations.

Please note that to use AI features, including Chat with AI, you must install the ChatAI plug-in in addition to EmEditor.

We also fixed issues found during the preview build.

We hope both the Pro and Free editions continue to meet your expectations. If you have any questions, feature requests, or suggestions, please contact us.

Thank you for your continued support of EmEditor.
— Yutaka Emura

For details, including major changes and screenshots, please see “What’s New in Version 26.1.”

If you use the Desktop Installer edition, you can update EmEditor by selecting Help > Check for Updates. If that does not work, please download the latest version and run the installer. We expect the Microsoft Store version to be available in the next few days. If you download the MSI installer directly, please confirm that the digital signature is signed by Emurasoft, Inc.

To update

If you use the installer version, please select Customize Update Checker on the Help menu, and set the Include preview versions in order to update automatically to future preview versions. Preview versions are also available from the links below or on the Previous Versions page.

Direct Downloads

• EmEditor Installer Version (MSI)
• ChatAI plugin Installer Version (MSI)

Note: When downloading the MSI installer, security features such as Microsoft Defender SmartScreen may temporarily block the download. This can happen because the digital signing certificate was renewed only a few days ago and has not yet built enough public reputation. If you see this warning, it is safe to continue the download. After downloading, please verify that the digital signature is signed by “Emurasoft, Inc.” The email field in the new digital signature is “Not available.”

Notes: The preview version supports only Japanese and English (United States). In other languages, new features may not be available.

Please contact us for any questions or comments. Thank you for trying EmEditor preview!

preview 1 (26.0.901) – March 11, 2026

New General Features

• When a file is modified externally, a delay of several milliseconds is now inserted before reloading, and the message box shown when reloading fails now allows selecting the Retry button.[PF]
• Improved the speed of various operations including Sort. [P]

New Options

• Added a The cursor moves to the correct position when sorting checkbox to the Sort page of the Customize dialog box.
• Added Provider, Model, Reasoning effort, and Text Verbosity checkboxes and drop-down list boxes, as well as a Web Search checkbox, to the AI Prompts page in the Customize dialog box. [P]
• Added Provider, Model, Reasoning effort, and Text Verbosity checkboxes and drop-down list boxes, as well as a Web Search checkbox, to the New Prompt dialog box. [P]

New Macro Features [P]

• Added the TextLength property to the Selection object.

Plug-in New Features [P]

• Added the EE_GET_SEL_LENGTH message and the Editor_GetSelLength inline function.

Bug fixes

• Fixed an issue where a response to the “Do you want to terminate the current tool job?” message box was not respected.
• Fixed a certain issue related to the WordComplete plug-in. [P]

preview 2 (26.0.902) – May 4th, 2026

New General Features

• The new versions remembers an the “Apply to All” option when multiple unsaved documents are being saved.
• Improved the speed when replacing all newlines in a document or inserting newlines.
• Improved the stability when copying and pasting a very large text.

New Options

• The Preferred model drop-down list box on the AI Options page of the Customize dialog box is now populated dynamically. [P]

New Macro Features [P]

• Added the LineNumbersZeroBase property to the GeneralProp object.

Bug fixes

• Fixed a DirectWrite rendering issue with double IVS characters.
• Fixed an issue with case insensitive sort with locale.
• Fixed an issue where a null character may not be detected when a document contains no newlines.
• Fixed a potential issue where an empty line could be appended.
• Fixed a potential crash when removing all newlines from a very large file.
• Fixed an issue that copying a very large text may fail.
• Fixed an issue where the Search Previous Warning Character/Unicode command may not work correctly in a very large file.

Notes

• [P] EmEditor Professional only
• [PF] EmEditor Professional and EmEditor Free

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• Help: https://www.emeditor.org/ → https://help.emeditor.com/
• Downloads: https://download.emeditor.info/ → https://download.emeditor.com/

With this change, all of our official resources will be hosted on emeditor.com or its subdomains. When you see emeditor.com in the URL, you can be confident that the site is authentic and secure.

If you visit the current domains, you will be automatically redirected to the new ones, so no action is required on your part unless you are an IT administrator. This change is scheduled for May 4, 2026.

Note for IT Administrators

If your organization uses a firewall to control EmEditor downloads, please whitelist download.emeditor.com (ports 80 and 443) for the program eeupdate.exe to ensure uninterrupted delivery of updates.

See also “What are the EmEditor subdomains?“

• Fixed an issue introduced in v26.0.0 that could cause a crash when running Replace or Delete on a multi-selection containing line breaks.
• Fixed an issue introduced in v26.0.0 where certain actions—such as Find, Replace, and filtering—might not be recorded in macros.
• Fixed an issue introduced in v26.0.0 where the “File types” list in the standard Open dialog could sometimes appear incorrectly.

If you use the Desktop Installer edition, update from Help > Check for Updates. If that doesn’t work, download the latest version and run the installer. We expect the Microsoft Store release in the next few days. If you download the MSI directly, please confirm that the digital signature is signed by Emurasoft, Inc.

• Fixed a v26.0.0 regression that could crash the app when searching, replacing, or filtering very large non‑UTF‑8 files under certain conditions.
• Fixed an issue that could occur during edits involving surrogate‑pair characters.
• Fixed a v26.0.0 regression in the Batch Find/Replace list where moving multiple selected items up or down didn’t work properly.

If you use the Desktop Installer edition, update from Help > Check for Updates. If that doesn’t work, download the latest version and run the installer. We expect the Microsoft Store release in the next few days. If you download the MSI directly, please confirm that the digital signature is signed by Emurasoft, Inc.

To improve web page loading times, developers often “minify” JavaScript, CSS, and HTML by stripping out line breaks and spaces. Similarly, data formats like XML and JSON may be compressed into a single line to make them easier to process as a continuous stream, even if that hurts readability. Some types of scientific data are even more extreme—for example, genome sequences (A, T, G, C) can be stored as one uninterrupted string billions of characters long. Files like these are becoming more common, and we’ve frequently heard from users that they can slow EmEditor down. Because these files contain extraordinarily long single lines, they can significantly impact performance. In v26.0, we reviewed and optimized our internal code using multithreading and SIMD, and our tests show open/search/replace performance improvements of 2.2× to 666× compared to the previous version.

EmEditor has supported Unicode since its early days, but entering characters that are hard to type—such as uncommon kanji, foreign-language characters, or emoji—used to be awkward. You had to open Insert > Special Characters (Ctrl+Shift+I), enter a code value, insert the character, and repeat the process each time. In v26.0, we redesigned this dialog as a custom bar that can stay open while you work. It now also supports searching by Unicode name and Unicode block, displays results in a large, easy-to-read font, and can render color-capable characters (such as emoji) in color. For example, searching for “smiling” will return many smiling-face emoji.

The Character Code Value dialog (Ctrl+I) has also been updated to display characters in a large, color font, making complex characters and emoji easier to recognize.

Based on customer feedback, we expanded the Favorites feature. In addition to files, you can now register folders as favorites. Selecting a folder opens the Open File dialog so you can choose the file you want. We also improved drag-and-drop behavior: when you drag multiple files in from Explorer, EmEditor won’t add duplicates if the same file name (with no line/column specified) is already in the list.

Markdown commands for bold, italic, and code now work even when no text is selected. For example, if you run the Markdown Bold command with nothing selected and then start typing, the text you enter will be inserted as bold.

The Undo/Redo History dialog, which has long been available as a modeless window, has been converted into a custom bar. This makes it easier to keep the history visible in a convenient spot while you continue editing.

Makoto Emura enhanced his Chat with AI and Commit List plug-ins. In Chat with AI, we added a “+ File” button on the left side of the input box so you can upload a selected file to your prompt if you are using an OpenAI model. This not only makes it easier to send more content than you could by typing or pasting, but also lets you attach supported files such as HTML, PDF, and Word. This feature uses OpenAI’s file search feature. Uploading a file typically uses less tokens than pasting the entire file text to the chat. We also added the ability to search within chat history (past conversations). Note that AI features—including Chat with AI—require installing the separate ChatAI plug-in in addition to EmEditor.

In Commit List, we improved performance across multiple operations, including displaying the changes list and commit history.

We also fixed issues found during the preview build.

We hope both the Pro and Free editions meet your expectations. If you have questions, feature requests, or ideas, please contact us.

We appreciate your continued support of EmEditor.
— Yutaka Emura

For details, including major changes and screenshots, see “What’s New in Version 26.0.”

If you use the Desktop Installer edition, update from Help > Check for Updates. If that doesn’t work, download the latest version and run the installer. We expect the Microsoft Store release in the next few days. If you download the MSI directly, please confirm that the digital signature is signed by Emurasoft, Inc.

Please see New in Version 26.0 for screenshots.

Please contact us for any questions or comments. Thank you for trying EmEditor preview!

To update

If you use the installer version, please select Customize Update Checker on the Help menu, and set the Include preview versions in order to update automatically to future preview versions. Preview versions can also be downloaded at Previous versions.

preview 1 (25.9.901) – January 26, 2026

New General Features

• You can now add both folders and files to Favorites. [PF]
• The Markdown Bold/Italic/Code command now works even when no text is selected. [P]
• The Undo/Redo History dialog has been replaced with a custom bar. [PF]
• The Insert Special Character dialog has been replaced with a custom bar, with improvements including a larger, color font and filtering by Unicode name and block. [PF]
• The Character Code Value dialog has been improved with a larger font and color support. [PF]
• Improved awkward English, German, and Japanese UI text. [PF]
• Discontinued the Russian UI in v25.4. [PF]

New Options

• Added the Add Folder button to the Favorites page of the Customize dialog box. [PF]
• Added gpt-5.2 and gpt-5.2.codex to the Preferred Model drop-down list in the AI Options page of the Customize dialog box (this feature requires the Chat with AI plugin). [P]

Plug-in New Features [P]

• Added the file search feature for Chat with AI, allowing you to upload files to use in chat.
• Added the search feature for Chat with AI to search for chat messages.
• Improved the performance of the commit list in CommitList.

Bug fixes

• Fixed an issue where entering an OpenAI API key in the AI Options page of the Customize dialog could trigger an error message and prevent the key from being saved.

preview 3 (25.9.903) – February 2, 2026

• Improved the speed of various operations including Opening a large file containing no newlines (one-line file).
• Fixed partial comparision issues.

Notes

[PF] EmEditor Professional and EmEditor Free

[P] EmEditor Professional only

The EmEditor desktop installer is now also available from the Microsoft Store.
The desktop installer available on the Microsoft Store is the same program for both EmEditor Professional and EmEditor Free (you get the same app and use it according to your license/usage).

We have also improved our official website (www.emeditor.com) so you can download EmEditor with greater peace of mind.

• The EmEditor desktop installer is now available from the Microsoft Store.
• Even if you cannot use the Microsoft Store, you can still download the desktop installer safely from our official website.
• Our website has been rebuilt as a static HTML-based site, which helps reduce risks such as website tampering compared to a dynamic site.
• This website is now hosted on Cloudflare Workers, giving us tightly controlled security. Cloudflare’s role‑based access control and enterprise-grade authentication standards help ensure only authorized changes are made, so you can trust that the content you see comes from us.

We will continue to provide only official installers through our website and other authorized distribution channels.
For your safety, please download EmEditor from trusted sources such as our official website or the Microsoft Store.

Download from Microsoft Store

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