A professional text editor for Mac.
v0.1.0-b218 (alpha) · Apple Silicon · macOS 13.2+ · Changelog
v0.1.0-b218 (alpha) · Apple Silicon · macOS 13.2+ · Changelog
Local
Your files, configuration, and tools stay under your control.
Scriptable
Automate repetitive work with Python and editor commands.
22960 # EditorContainer : _on_tab_label_clicked
22961 @func_trace
22962 def _on_tab_label_clicked(self):
22963 editor = ensure_not_deleted(self.main_editor.editor)
22964 if editor is not None:
22965 safe_focus(editor)
22966
22967 # EditorContainer : _on_tab_label_toggle
22968 @func_trace
22969 def _on_tab_label_toggle(self):
22970 window = ensure_not_deleted(self.window)
22971 if window is None:
22972 return
22973
22974 buffer = self.buffer
22975 if buffer is None:
22976 return
22977
22978 window.buffer_manager.toggle_active(buffer)
22979
22980 # EditorContainer : _on_tab_label_exclusive
22981 @func_trace
22982 def _on_tab_label_exclusive(self):
22983 window = ensure_not_deleted(self.window)
22984 if window is None:
22985 return
22986
22987 buffer = self.buffer
22988 if buffer is None:
22989 return
22990
22991 window.buffer_manager.set_as_active_tab(buffer)
22992
22993 # EditorContainer : _file_changed
22994 @func_trace
22995 def _file_changed(self, *_): [97 lines folded]
23093
23094 # EditorContainer : _do_after_file_changed
23095 @func_trace
23096 def _do_after_file_changed(self): [5 lines folded]
10373 directory = os.path.dirname(path) or "."
10374 tmp_path = None
10375
10376 os.makedirs(directory, exist_ok=True)
10377
10378 fd, tmp_path = tempfile.mkstemp(dir=directory, prefix=".tmp_")
10379
10380 try:
10381 with os.fdopen(fd, "w", encoding="utf-8") as f:
10382 f.write(text)
10383 f.flush()
10384 os.fsync(f.fileno())
10385
10386 os.replace(tmp_path, path)
10387 tmp_path = None
10388
10389 finally:
10390 if tmp_path is not None:
10391 try:
10392 os.remove(tmp_path)
10393 except OSError:
10394 pass
10395
10396 # CodeEditor : _save_file
10397 # @func_trace
10398 def _save_file(self): [113 lines folded]
10512
10513 # CodeEditor : _save_shadow_file
10514 @func_trace
10515 def _save_shadow_file(self): [18 lines folded]
10534
10535 # CodeEditor : save_file_as
10536 @plugin_api
10537 @command("Save file as...")
10538 def save_file_as(self): [20 lines folded]
10559
10560 # CodeEditor : save_file_copy_as
10561 @plugin_api
10562 @command("Save copy of file as...")
10563 def save_file_copy_as(self): [20 lines folded]
Peeknext is built around a native C++ editing core, with responsiveness treated as a constraint rather than an optimization added later.
Editing stays responsive as files grow, with multiple views of the same document sharing a single underlying buffer.
Performance is measured on real source files and published with reproducible benchmarks.
View features → 267 // enter new state
268
269 if (sc.state == SCE_HACK_DEFAULT) {
270 // numbers
271 if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
272 sc.SetState(SCE_HACK_NUMBER);
273 }
274 // identifiers
275 else if (!sc.atLineEnd && (setWordStart.Contains(sc.ch) || (sc.ch == '@'))) {
276 sc.SetState(State_Identifier);
277 }
278 // block comment
279 else if (sc.Match('/', '*')) {
280 sc.SetState(State_BlockComment);
281 sc.Forward();
282 }
283 // line comments
284 else if (sc.Match('/', '/')) {
285 sc.SetState(State_LineComment);
286 }
287 // strings
288 else if (sc.ch == '\"') {
289 sc.SetState(SCE_HACK_STRING);
290 isIncludePreprocessor = false;
291 }
292 // includes
293 else if (isIncludePreprocessor && sc.ch == '<') {
294 sc.SetState(SCE_HACK_STRING);
295 }
296 // characters
297 else if (sc.ch == '\'') {
298 sc.SetState(State_Character);
Ultra low-latency typing
16.6 ms P95 typing latency on a 753,821-line source file. Fastest of all compared editors.
Benchmarks →Multiple views
Work in multiple views of the same document without sacrificing editing responsiveness.
Multiple views →Handles very large files
Edit syntax-highlighted files with millions of lines smoothly and responsively.
Large file performance →Measured, not claimed
16.6 ms
P95 typing latency on a 753,821-line source file.
20M lines
Largest syntax-highlighted file tested.
698 MB
Memory usage at 5 million lines source file.
15 types
16 int
17 float
18 arguments
19 out : stdin to use previous output as input
20 : stdout to print
21 """
22
23 program = """
24 Module add 1 2 3 type=float out=stdin
25 Module sub stdin 1 2 type=int out=stdout
26 """
27
28 # Module definition
29 class Module:
30
31 # Add function
32 def add(*args, **kwargs):
33 type_ = globals()["__builtins__"].getattr(globals()["__builtins__"], kwargs["type"])
34
35
36 # Sub function
37 def sub(*args, **kwargs):
38 type_ = globals()["__builtins__"].getattr(globals()["__builtins__"], kwargs["type"])
39 return float(args[0]) if type_ == 'float' else int(args[0]) - sum(map(type_, args[1:]))
40
41 def get_args(tokens, STDIN): [18 lines folded]
60
61 def interpret(program): [25 lines folded]
87
88 interpret(program) # 3
89
Useful features without sending your code somewhere else. Peeknext works directly with local files, local indexes, and local models.
Context-aware autocomplete is built from the current file, without requiring a language server. AI features run locally through Ollama and are disabled by default.
Your files stay on your machine, and the editor remains fully functional offline.
View features →Context-aware autocomplete
Complete words from the current file, ranked by nearby context and usage.
Context-aware autocomplete →Local-first AI
Run inline chat and code completion locally with your own models through Ollama.
Local AI →No telemetry
No accounts, usage tracking, or analytics. Peeknext works fully offline with your files.
Privacy Policy →Privacy by design
No telemetry or tracking. No background downloads. Not even an auto-updater.
Offline mode not required.
Peeknext exposes editor commands to Python, so repetitive work can become part of the editor instead of another plugin or external tool.
Write ordinary Python functions, expose them as commands, assign keybindings, and use them just like the editor's built-in commands.
Inline commands bring the same idea into the document: run shell commands, evaluate Python, or use AI without leaving the editor.
View features → 9 ////////////////////////` Resolution: 3440x1440
10 -+++++++++++++++++++++++` DE: Aqua
11 /++++++++++++++++++++++/ WM: Quartz Compositor
12 /sssssssssssssssssssssss. WM Theme: Graphite (Dark)
13 :ssssssssssssssssssssssss- Font: MenloRegular
14 osssssssssssssssssssssssso/` Disk: 375G / 494G (83%)
15 `syyyyyyyyyyyyyyyyyyyyyyyy+` CPU: Apple M2 Pro
16 `ossssssssssssssssssssss/ GPU: Apple M2 Pro
17 :ooooooooooooooooooo+. RAM: 1914MiB / 16384MiB
18 `:+oo+/:-..-:/+o+/-
19
20 % git log --oneline -5
21 7e43c91 Fix stale index results after file changes
22 20b9ad4 Add PHP symbols to file outline
23 e3816fc Preserve cursor position when reopening files
24 9ad0c72 Reduce allocations while indexing large files
25 615bc84 Fix split view restoring the wrong document
26
27 > Summarize these changes for the changelog.
## Editor
- Added PHP symbols to the file outline.
- Cursor position is now preserved when reopening files.
- Fixed split views occasionally restoring the wrong document.
## Performance and reliability
- Reduced memory allocations while indexing large files.
- Fixed stale autocomplete results after files changed on disk.
1 2 # This is the default scripts-file for Peeknext 3 4 @command("Word count") 5 def word_count(): 6 import re 7 8 text = selected_text() 9 count = len(re.findall(r"\b[\w'-]+\b", text)) 10 11 message (f"Word count: {count:,} words") 12 13 @command("Insert UUID") 14 def insert_uuid(): [2 lines folded] 17 18 @command("Markdown: Selection to link") 19 def insert_link(): [2 lines folded] 22 23 @command("Markdown: Insert unchecked box") 24 def insert_unchecked_box(): [1 lines folded] 26 27 @command("Markdown: Wrap selection in fenced block") 28 def fenced_block(): [2 lines folded] 31 32 @command("Markdown: Bold") 33 def make_bold(): 34 text = selected_text() 35 insert_text(text=f"**{text}**") 36 37 38 39
Python scripting
Write editor commands as ordinary Python functions and bind them to keys or run them from the command palette.
Explore the API →Inline commands
Run shell commands with %, inline chat with >, or evaluate Python directly from the document.
Shell and Python eval →Plain-text configuration
Configure settings, keybindings, models, and editor behavior in files you can inspect, edit, and version.
Documentation →Zero-latency typing
Peeknext maintains a measured P95 typing latency of 17.86 ms while editing a 1 million-line Odin source file with syntax highlighting enabled.
Local AI, on your Mac
Peeknext works directly with local Ollama models, with no account, telemetry, or cloud intermediary. Use local code completion and inline AI while keeping your code and inference on your Mac.
Native macOS code editors
A look at code editors built specifically for macOS, from long-running editors like BBEdit and TextMate to newer alternatives like Nova, CodeEdit, and Peeknext.
Plain text note taking
Keep notes as ordinary Markdown, plain text, Org Mode, or other files. Open directly into your notes folder, search with ripgrep, and organize everything without a proprietary database.
Personal Early bird offer
$195
$325
One-time payment, lifetime license
Single user (You)
Unlimited machines
Commercial use
Buy once, own forever
Teams
$795 /year
For smaller teams, stackable
Up to 10 users per license
Unlimited machines per user
Commercial use
One-year expiry
Business
$19,995 /year
No per-seat management, pay by invoice
Unlimited users
Unlimited machines per user
Commercial use
One-year expiry
Licensing
Free for non-commercial use. Commercial use requires a license.
Is Peeknext free?
Free for non-commercial use.
Is the Personal license a subscription?
No, it's a one-time purchase.
Can I use Peeknext on multiple Macs?
Yes, the Personal license covers one user on unlimited machines.
Does Peeknext require an account or internet connection?
No.
Is Peeknext free?
Free for non-commercial use.
Is the Personal license a subscription?
No, it's a one-time purchase.
Can I use Peeknext on multiple Macs?
Yes, the Personal license covers one user on unlimited machines.
Does Peeknext require an account or internet connection?
No.
Simple, perpetual licensing
Free for non-commercial use. One-time licensing for professional use. For Teams →
Pricing →
What we're currently working on and have planned.
File preview in file explorer
Diff preview as second split pane
Writer mode with focused interface
Optional variable fonts sizes and wikilinks
Faster search in very large files
One command palette for all dialogs
Hand-tuned native lexers for fast, precise syntax highlighting.
Minimal syntax highlighting for better performance. The lexers are written in C++ and optimized for speed.
Code folding is syntax-aware, allowing for language-specific behavior.
Some languages have file outline support, enabling navigation through the code via symbols.
Ada Lexilla
AsciiDoc Lexilla
Asm
Bash Lexilla
C
Clojure
CMake Lexilla
CSS Lexilla
C++
D
Dart Lexilla
Diff
Elixir
Erlang Lexilla
Fortran Lexilla
F# Lexilla
Gleam
Go
Haskell Lexilla
HTML
Jai
Java
JavaScript
Julia Lexilla
JSON Lexilla
LaTeX Lexilla
Lisp Lexilla
Lua Lexilla
Makefile Lexilla
Markdown
MATLAB
Mojo
Nim Lexilla
Nix Lexilla
OCaml Lexilla
Odin
Org
Pascal Lexilla
Perl
PHP
Python
R Lexilla
Ruby Lexilla
Rust
SQL Lexilla
Swift
Tcl Lexilla
TOML Lexilla
TypeScript
Typst
WAT
YAML
Zig
Bye, bye custom lexer feature
Some behind-the-scenes upgrades to Qt, Scintilla, and Peeknext's lexer system.
Koi is now Peeknext
Koi Editor and Hackerman are now Peeknext, with a shared name and visual identity.
Debugging race condition that was actually a lifetime bug
A random QThread crash looked like a race condition, but turned out to be an orphaned editor buffer and delayed garbage collection.