TF-Editor

TF-Editor brings a fast, native coding experience to macOS. Because it's built on AppKit rather than a web view, it stays responsive with large files and dense Japanese content where other editors stumble — full-width spaces and CJK columns render precisely, with no cursor jumps or misalignment.

The workspace is designed for real development work: syntax highlighting rendered on the visible range for smooth scrolling, an outline sidebar for instant navigation to types and functions, multi-file Grep with regular expressions, code folding, bookmarks, and side-by-side diff against the saved version or a second file. Automatic backup, auto-save, and crash recovery mean your work is never lost.

TF-Editor automatically detects UTF-8, Shift_JIS, EUC-JP, and ISO-2022-JP encodings and handles LF / CRLF / CR line endings freely. Its interface is available in Japanese, English, Simplified Chinese, and Korean. TF-Editor collects no data and requires no account. Made by Technology Frontier Co., Ltd.