Hidemaru Editor
What Hidemaru Editor is
Hidemaru Editor is a Windows text editor for program source, email, HTML, and other text files. It can edit files of up to 10 million lines, with regular-expression search, fuzzy search, and GREP search-and-replace across multiple files. Editing options include customizable colors, word completion, vertical writing, macros, tabs, file comparison, and TSV or CSV modes. Optional add-ons cover internet and printing functions, while libraries extend macros, color definitions, conversion modules, and word-completion dictionaries. The maker lists EditorConfig support among version 9.00 changes and offers signed 32-bit and 64-bit installers for version 9.59. Windows 7 through 11 are supported. The software is paid but has a free trial; one listed license costs 4,400 JPY once, with free upgrades after purchase. Saito Kikaku LLC provides email and AI-chat support.
Who it suits
It suits Windows users who edit very large text files or need advanced search, macros, comparison, and text-format modes. A trial is available before buying a continued-use license.
What it does well
- Handles files up to 10 million lines
- Regular-expression and fuzzy search
- GREP across multiple files
- Macros, tabs, and file comparison
- Free upgrades after purchase
What to know first
- Windows-only software
- No free plan
- License costs 4,400 JPY once
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Hidemaru Editor license | Paid license for continued use · Updates after purchase are free | On request |
| 秀丸エディタ | 税込み価格 4,400円（税抜き価格 4,000円） · 1ライセンス · 購入後のバージョンアップ無料 · 試用後に継続利用するにはライセンス購入が必要 | ¥4,400, paid once |
As hide.maruo.co.jp lists them, read 23 Sept 2026. The maker's own page has the final word.
Verdict
Hidemaru Editor combines very large-file support with broad search and editing tools for Windows. Its paid license includes a trial and free version upgrades, but users on other platforms are not supported.
Facts from Hidemaru Editor's own pages
- Company
- The maker identifies itself as Saito Kikaku LLC, based in Sabae, Fukui Prefecture, Japan, and gives its establishment date as 1993-11-17. · hide.maruo.co.jp, 11 Oct 2026
- Download
- The maker offers signed 32-bit and 64-bit Windows installers for version 9.59, dated 2026-10-08. · hide.maruo.co.jp, 11 Oct 2026
- Editing features
- The product page lists customizable color display, word completion, vertical writing, macros, tabs, file comparison, and TSV and CSV modes. · hide.maruo.co.jp, 11 Oct 2026
- EditorConfig
- The maker lists EditorConfig support among the editor's version 9.00 changes. · hide.maruo.co.jp, 11 Oct 2026
- Extension support
- Yes · hide.maruo.co.jp, 23 Sept 2026
- Free plan
- No · hide.maruo.co.jp, 23 Sept 2026
- Integrations
- The maker lists optional add-ons for internet and printing functions, and libraries for macros, color display definitions, conversion modules, and word completion dictionaries. · hide.maruo.co.jp, 11 Oct 2026
- Large-file handling
- Yes · hide.maruo.co.jp, 23 Sept 2026
- Large files
- The editor can edit files up to 10 million lines. · hide.maruo.co.jp, 11 Oct 2026
- License terms
- Users can download and try the shareware before purchase; the maker says license fees are paid in advance, returns and exchanges are unavailable, and version upgrades after purchase are free. · hide.maruo.co.jp, 11 Oct 2026
- Purpose
- Hidemaru Editor is a text editor for Windows for editing text files, including program source, email, and HTML. · hide.maruo.co.jp, 11 Oct 2026
- Search
- It supports regular expression and fuzzy search, plus search and replace across multiple files (GREP). · hide.maruo.co.jp, 11 Oct 2026
- Security
- The maker says files with “_signed” in the filename are digitally signed to verify the publisher and that the file has not been changed since signing. · hide.maruo.co.jp, 11 Oct 2026
- Support
- The support page provides email contact for Hidemaru Editor and links to an AI chat for questions. · hide.maruo.co.jp, 11 Oct 2026
- Supported platforms
- Windows · hide.maruo.co.jp, 23 Sept 2026
- Supported Windows
- The maker lists Windows 7, 8, 8.1, 10, and 11 as supported, and says Windows XP and Vista support ends at version 9.57. · hide.maruo.co.jp, 11 Oct 2026
- Support limits
- The maker's quality terms say it may replace or repair software that fails its stated warranty, and it is not obliged to fix an issue it cannot reproduce in its tests. · hide.maruo.co.jp, 11 Oct 2026
- Vulnerability handling
- The maker says it is registered on JPCERT/CC's product developer list and actively addresses software vulnerabilities. · hide.maruo.co.jp, 11 Oct 2026
Where Hidemaru Editor stands on Freedom251
- Text Editors#81 of 82