Notepatra is a native Qt5 + QScintilla code editor with an original C++17/Rust core, built for the AI era. It runs on Linux, macOS Apple Silicon, and Windows, has a ~13 MB bare native executable (~13.4 MB on Linux x64), supports 238 file types with 82 language lexers, and includes AI-powered formatters that fix broken JSON, HTML, and brackets. The AI panel ships six dropdown backends — two local (Ollama, llama.cpp) and four cloud (Ollama Cloud, OpenRouter, OpenAI, Azure OpenAI) — and the llama.cpp entry also accepts a user-configured base URL for any OpenAI-compatible server.

Is Notepatra free? Is there a paid version?

Notepatra is free forever and licensed under GPL-3.0. There is no paid version, no subscription, no enterprise upsell, no telemetry. The source code is open on GitHub.

What makes Notepatra different from other code editors?

Notepatra is its own editor — a native Qt5 + QScintilla app with an original C++17/Rust core. It runs natively on Linux x64 / ARM64, macOS Apple Silicon, and Windows x64 from a single codebase, with a ~13 MB bare executable (~13.4 MB on Linux x64). Local-first AI is built in: pick from Ollama, llama.cpp, OpenRouter, OpenAI, Azure OpenAI, or Ollama Cloud. The Data Analyst mode works out of the box on CSV files and an in-memory SQLite engine; the Full download bundles the DuckDB v1.1.3 engine on every platform (Lite has CSV + SQLite only). The Composer tab adds a multi-file Edit Plan, `@file` mentions, Ctrl+I inline edit, AI-driven git tools (read-only: status / diff / log / branch / show), and multi-cursor editing. No Electron runtime, no telemetry, no mandatory account.

How big is the Notepatra binary?

The bare Notepatra executable is ~13 MB across every platform (13.4 MB on Linux x64). Latest v0.1.129 download sizes: 4.7 MB Linux x64 tar.gz, 4.7 MB Linux ARM64 tar.gz, 28.0 MB macOS DMG (with bundled Qt), 43.9 MB Windows MSI / 33.0 MB NSIS / 37.8 MB portable zip (with bundled Qt + QScintilla DLLs). After Windows install the on-disk footprint is ~75-85 MB because the MSI extracts the bundled Qt5 DLLs and QScintilla DLL out of the compressed payload — that's normal for any Qt app installer. Linux installs stay tiny (~13.4 MB on disk / bare) because Qt5 comes from your distro repo. Notepatra installs at ~12–85 MB depending on platform.

Does Notepatra send my code to the cloud?

No. Notepatra is local-first. The AI panel ships two local dropdown backends — Ollama and llama.cpp (llama-server, loads any GGUF directly) — and the llama.cpp entry also accepts a user-configured base URL so you can point it at any OpenAI-compatible server you have installed (examples redacted — those are separate programs that the user installs and licenses, not bundled with Notepatra). There is no telemetry, no analytics, no mandatory API key, no remote server, no phone-home in the current release. The only outbound network connections are: your chosen AI backend (when you click an AI button), git push/pull (when you click those buttons), and the REST client tab (when you explicitly send a request).

How do I install Notepatra?

On Linux or macOS run: curl -fsSL https://notepatra.org/install.sh | sh — on Windows PowerShell run: irm https://notepatra.org/install.ps1 | iex. Both scripts auto-detect your OS, download the right binary, verify the SHA-256 checksum, and install. You can also download binaries directly from the GitHub Releases page.

How do I verify the Notepatra binary I downloaded is genuine?

Every release ships with three independent integrity checks: SHA-256 checksums (sha256sum -c SHA256SUMS), Sigstore cosign signatures (keyless OIDC, recorded in the public Rekor transparency log), and SLSA build provenance attestations (verifiable with gh attestation verify). Full instructions in SECURITY.md.

Notepatra was envisioned and is maintained by Prateek Singh, with much of the implementation written with Claude's help. Single-maintainer open-source project, free forever under GPL-3.0.

Notepatra — The Code Editor Built for the AI Era

Name: Notepatra
Availability: InStock
Author: Prateek Singh

Download v0.1.129

One-command install or direct download

Auto-detecting installer scripts, or pick your platform from GitHub Releases. No telemetry. No tracking. Just a binary.

🌐

Notepatra

DEFAULT

Local AI out of the box · cloud LLMs opt-in. Talk to Ollama or llama.cpp locally by default, or any OpenAI-compatible server via the llama.cpp entry's user-configured URL. Paste an OpenAI / Anthropic / OpenRouter / Mistral / Azure URL in Settings if you want cloud — fully optional, no key required for local use.

Pick this if you want maximum flexibility — local first, with cloud available when you need a flagship model on a hard problem. Most users.

.tar.gz .deb .rpm .AppImage .dmg .msi .exe .zip

Get Notepatra v0.1.129 →

🔒

Notepatra Local AI

CLOUD-FREE

Physically cannot talk to any public LLM endpoint. api.openai.com · api.anthropic.com · openrouter.ai · api.mistral.ai · api.groq.com · everything else — refused at the network layer. Ollama / llama.cpp / LAN-hosted LLMs continue to work.

For regulated industries (finance, healthcare, legal, gov), data-sovereignty regions (EU GDPR, India RBI, China), air-gapped engineering networks. Built via -DNOTEPATRA_NO_CLOUD=ON — auditable, no setting to flip.

notepatra-local-ai_*_amd64.deb notepatra-local-ai_*_arm64.deb notepatra-local-ai-*.msi

Get Notepatra Local AI v0.1.129 →

Both flavors are local-first by default. The regular build adds optional cloud LLM URLs you paste in Settings; the Local AI build refuses them at the network layer for auditable compliance. notepatra --version tells you which flavor you have installed.

🐧

Linux x64

Binary · 4.7 MB .tar.gz

.tar.gz

🐧

Linux ARM64

aarch64 · Raspberry Pi 5 · 4.7 MB .tar.gz

.tar.gz

🍎

macOS Apple Silicon

M1 / M2 / M3 / M4 · 28.0 MB .dmg

.dmg

🪟

Windows x64

37.8 MB zip · 43.9 MB MSI · 33.0 MB setup.exe

.zip / .msi / .exe

💼 Portable .zip = most-downloaded format. Extract anywhere — USB stick, locked-down work laptop, cloud sync folder. Zero registry, zero admin. Ships with two one-click helpers: register-associations.bat adds Notepatra to Windows "Open with" for 27 file extensions (.txt .md .json .py .cpp .js .rs .go .sql .html .css and more), unregister-associations.bat undoes it. HKCU-only — never asks for admin.

Features

Everything you need. Nothing you don't.

Built on QScintilla — a battle-tested Scintilla-based editor engine. Hot-path file I/O and search use Rust for memory safety on untrusted input.

🔒

Password Generator — passwords, passphrases, SSH keys NEW IN v0.1.129

One tab, three pages on a left rail — Password, Passphrase, SSH key (Alt+1 / Alt+2 / Alt+3). Passwords draw from a shell-safe symbol set; passphrases from a 2,048-word list compiled into the binary (11 bits a word). SSH key makes a real OpenSSH pair — Ed25519, ECDSA P-256 / P-384, RSA 3072 / 4096 — with an optional passphrase encrypted the way ssh-keygen does it, an empty comment by default (no user@host leak), the private key hidden until you ask, and Save that sets 0600 before writing and never overwrites. The bits readout is a real count, not a score. Every draw comes from the OS random source through the Rust core; nothing is stored, sent to an AI backend, or visible to MCP. Offline, in every build including Lite.

🔌

MCP — your editor, readable by your AI 49 TOOLS · v0.1.129

A built-in Model Context Protocol server (notepatra-mcp) connects the assistants you already use — Claude Desktop, Claude Code, OpenAI Codex, the OpenAI Agents SDK, and any spec-compliant MCP client — to the running editor. 49 tools in three tiers: read (tabs, selection, search, Noter notes, reminders, read-only Git and SQL, diagram source, saved-connection list/query/tables), act (open, compare, format, navigate, select range, open notes, create diagram, open Noter panel, open Data Analyst, render chart), and write (edit, save, create/append notes, set reminders, replace diagram source, export diagrams, export query results, export chart) — where every write shows an Approve / Deny card inside the editor and does nothing until you click Approve (auto-deny after 120 s, no headless bypass). Local socket + stdio only — nothing leaves your machine. Read the MCP docs →

🤖

AI Assistant (Ctrl+Shift+A)

Local-first AI. Two local dropdown backends: Ollama and llama.cpp (any GGUF). The llama.cpp entry accepts a user-configured URL, so it can reach anything that speaks OpenAI's /v1/chat/completions — any OpenAI-compatible server (those are separate programs you install, not bundled). Explain · Find Bugs · Refactor · Write Tests · Fix JSON · Add Comments · Optimize · Translate. No mandatory API key, no telemetry. Default is local — your code stays on your machine. Cloud LLMs (OpenAI, OpenRouter, Ollama Cloud, Azure OpenAI) are opt-in from the dropdown.

🔎

Project Search (Ctrl+Shift+G)

Recursive search across file names AND file contents, project-wide. Streams line by line so memory use stays flat regardless of file size — tested on 2 GB logs. Exact line:col coordinates, double-click a match to jump the caret to the exact character. Any text-based language. Skips binary files with a NUL-byte heuristic.

🗒️

Noter — meeting notes

A local-first, two-pane notes workspace — notes list on the left, editor on the right. No accounts, no bots; notes live in plain files under ~/Documents/Notepatra/Noter/. AI Extract (Ctrl+Alt+E) pulls a summary plus action items, decisions, questions, and risks. Set reminders on any note — or straight from Extract — and they're all collected in a central Reminders list (Overdue · Today · This week · Later) with desktop notifications at the due time while Notepatra is running.

📐

Diagram tool (.npd)

Flow charts, ER diagrams and system designs from a tiny text DSL — the .npd source is the truth, the canvas is a live projection. Describe it in plain English and a local model writes it (review before it touches the canvas), start from a template, or type it yourself — Import Mermaid too, now mapping -.-> and subgraph. Drawn flat, like an engineering diagram: no gradients, no drop shadows, a 1.5 px border and the app’s own font. Two light palettes (paper, slate) join the dark ones, and the new default palette auto follows the app theme. 5 shapes, ~55 hand-drawn icons, labelled + bidirectional arrows, dashed edges (a -.-> b) for the async or best-effort hop, direction LR for a left-to-right layout, group "Label" : a b containers, note cards and a legend box. Export to PNG / JPEG / PDF on every build (plus SVG / HTML / WebP where your Qt supports them). Opens from the toolbar next to Noter. Renders natively in the default binary — every platform, no WebEngine.

🔍

AI Interaction Log

Audit exactly what your AI did — transparency, not just a promise. Every request and response to any backend — local (Ollama / llama.cpp) or cloud (OpenRouter / OpenAI / Azure / Ollama Cloud), including Noter's Extract — is recorded to a local SQLite log you can open and read: timestamp, backend, model, full prompt + response, tokens, latency. Entries auto-prune after 7 days; a credential scrubber masks API keys / tokens / PEM keys before writing. The viewer has filters, Export JSON, and Prune-now. On by default with one-click opt-out in Settings. Zero network egress — purely local. Open from Features → AI Interaction Log…

⚡

Rust-Powered Core

Memory-mapped file I/O. Aho-Corasick search. Myers diff. Tested on 2 GB files. The heavy lifting runs in compiled Rust — no garbage collector, no runtime.

🔄

Safe auto-update

Click Download in the in-app "update available" dialog and the right artifact for your OS + architecture is fetched, SHA-256 verified against the release's SHA256SUMS, and handed to the native installer (MSI on Windows, DMG in Finder on macOS, file manager on Linux). Your current install is never touched by the updater — the OS installer does the swap under its own transactional rollback. Checksum mismatch, cancelled download, network drop, disk full — any failure leaves the running app exactly as it was.

📅

Insert Date / Time

Edit → Insert, or Ctrl+F5. Five formats: 2026-04-20 13:45, 2026-04-20, April 20, 2026, 13:45:09, ISO-8601. Saves keystrokes in logs, changelogs, meeting notes.

🖱

Clickable status bar

Click Language, Encoding, or EOL indicators in the status bar to pop the matching change-menu right where you clicked.

📂

Clean menu organization

Three clear menus — Tools (everything built-in: AI, Terminal, Compare, JSON/HTML/SQL, Git, REST, Bracket), Plugins (third-party extensions YOU add), Utilities (Hash, Measurement). No more guessing where a feature lives.

🔀

Compare with word-level diff

Side-by-side Scintilla diff. Green for added, red for deleted, amber for changed — with LCS-based word-level intra-line highlighting so you see the exact tokens that changed. Dark mode aware. Prev/Next navigation. Ignore whitespace, case, empty lines.

📁

Session Persistence

Close Notepatra, reopen tomorrow — same files, same cursors, same window size. Crash recovery saves unsaved work every 5 seconds by default (interval configurable).

👁

File Change Detection

Someone edits your file externally? Notepatra asks: reload or keep yours. Git gutter shows changed lines in green/yellow/red.

🎙

Macro Recording

Record keystrokes (Ctrl+Shift+M), playback (Ctrl+Shift+P), run multiple times, save to .macro files, replay tomorrow.

📑

238 File Types

82 language lexers — Python, Rust, Go, C/C++, Java, JS/TS, SQL, HTML, CSS, JSON, YAML, Markdown, Bash, Fortran, Verilog, MATLAB, LaTeX and more.

🎨

3 Themes + Color Tags

Light, Dark, Monokai. Color-tag any tab (7 colors + custom). Pastel green current line, double-click word highlight in orange.

🧩

Plugin System

Drop a .so/.dll/.dylib in the plugins folder. Simple C API — export 2 functions to create a plugin. JSON, HTML, SQL, Bracket tools all built in.

🔭

Find & Replace

In-document find / replace / extended mode (\n, \t, \xNN) / regex. Ctrl+F to find, Ctrl+H to replace. For searching across multiple files, use Project Search (Ctrl+Shift+G) at the top of this grid instead.

Editor	Size	AI Built-in	JSON Fixer	Diagrams	Notes	2 GB Files	Linux	Windows	Mac	Free
Notepatra	~13 MB	✓	✓	✓	✓	✓	✓	✓	✓	✓
Notepad++	9 MB	✗	Plugin	✗	✗	✗^†	✗	✓	✗	✓
VS Code	300 MB	Extension	Extension	Extension	Extension	✗	✓	✓	✓	✓
Sublime Text	30 MB	✗	✗	✗	✗	✓	✓	✓	✓	$99
Kate	40 MB	✗	✗	✗	✗	✓	✓	✗	✗	✓
Vim	3 MB	✗	✗	Plugin	✗	✓	✓	✓	✓	✓

Version History

Releases

Every release of Notepatra, from the very first one — transparent, append-only, no surprises. Note: v0.1.4 / v0.1.6 / v0.1.11 tags exist in git but were never published as GitHub Releases — their content was rolled forward into v0.1.5, v0.1.7, and v0.1.12 respectively to reduce release churn.

v0.1.129 LATEST

2026-08-22 · ssh-keygen puts your username and machine name in every key it makes. This one leaves the comment blank. The Password Generator grows a left rail and an SSH key page, every draw now comes from the OS random source, and .npd diagrams are drawn flat, with light palettes, groups, notes, legends and dashed edges. · Lite (default, bare) + Full · Linux · macOS (incl. Apple Silicon) · Windows

New — SSH keys, behind a rail

A left rail replaces the two radio buttons — Password, Passphrase and SSH key, each its own page, reachable with Alt+1 / Alt+2 / Alt+3. The menu entry is now Tools → Password Generator — Passwords / Passphrases / SSH keys.
Key types — Ed25519 (recommended and the default), ECDSA P-256 and P-384, RSA 3072 and 4096, and RSA 2048 marked legacy. Each entry says in its tooltip when it is the right pick; the honest answer is Ed25519 unless something forces your hand.
The comment field is empty by default, and that is the point. ssh-keygen defaults the comment to user@host, which copies your username and your machine's name into every authorized_keys file the key is ever pasted into. Type a label if you want one — work-laptop — but nothing is put there for you.
An optional passphrase encrypts the private key with aes256-ctr and bcrypt-pbkdf (16 rounds) — the same construction ssh-keygen writes, so ssh-add and OpenSSH read it directly.
The public line and its SHA256 fingerprint are shown immediately; the private key is not. It stays off-screen until you tick Show private key. Copy private key arms the 30-second clipboard wipe; copying the public line does not, because a public key is not a secret.
Save private key… creates the file, sets it to 0600, and only then writes the bytes, so the key is never briefly world-readable. It refuses to overwrite an existing file, and writes the .pub companion (0644) beside it.
Generation runs off the GUI thread — RSA-4096 measured between 1.6 and 5.9 seconds on the test machine, and the window stays responsive throughout. Ed25519 is effectively instant.
Checked against OpenSSH itself. The test suite runs the system ssh-keygen over the generated keys: -y reproduces the same public line, -lf the same fingerprint, and -y -P opens the encrypted key and rejects the wrong passphrase.

Where the randomness comes from — changed

Every draw now goes through the OS random source (getrandom on Linux, the platform equivalent elsewhere) via the Rust core. That covers SSH keys and every password and passphrase; QRandomGenerator::system() is now the fallback, not the source.
This is a correction, not a boast. Before v0.1.129 the source was Qt's generator, and on x86-64 that means the CPU's RDRAND instruction first — measured at ~7 million draws with zero getrandom syscalls. A reader who assumed "the OS CSPRNG" was reading something else. Now it is what it says. Rejection sampling and the draw-again set guarantee are unchanged, so the bits figure means exactly what it meant before.
Cost: about 0.6 MB of binary for the pure-Rust crypto (RustCrypto ssh-key). No new runtime dependency, no download, no network — the SSH page works with the machine offline.

Diagrams (`.npd`) — flat, lighter, and able to say more

Flat rendering. No gradients, no drop shadows: a 1.5 px border, the application's own font, and a tighter grid. It reads like something drawn for a design doc rather than a slide.
Light palettes. paper and slate join the existing dark ones, and palette auto is the new default — it follows the app theme, using paper in a light theme and the dark default in a dark one. A per-node colour now renders as a tint on a light ground (soft wash, full-strength border, normal dark text) instead of a solid fill.
New grammar: direction LR (or TB, the default) · dashed edges a -.-> b and a <.-> b for the async, optional or best-effort hop · group "Edge tier" : cdn api draws a labelled container behind those nodes · note api "Rate-limited to 100 rps" pins a card beside one · legend dashed "async" and legend #cc785c "hot path" build a legend box, which appears only when you write at least one legend line.
Mermaid import now maps -.-> to a dashed edge and subgraph … end to a group.

Regressions and known issues — read before upgrading

Existing .npd files without a palette line will look different. They now resolve to palette auto, so on a light theme they render light instead of dark. Pin the old look by adding an explicit palette default (or any named dark palette) to the file.
group, note, legend, direction and layout are now reserved words. A file that used one of them as a node id needs that id renamed.
Windows does not get the 0600 permission. The chmod is a POSIX call and is skipped there; check and tighten the file's ACL yourself after saving a private key.
RSA-4096 can take several seconds (1.6–5.9 s measured). The button shows Generating… and the UI stays responsive, but it is not instant. Ed25519 is.
The clipboard caveat still applies. The 30-second wipe removes the value only if the clipboard still holds it — it cannot reach into a clipboard-history tool, a manager that has already stored the entry, or another machine's shared clipboard.
Notes are placed to the right of their node (below it when direction LR), and a long note widens that row. Keep note text short, or expect the layout to spread.
Mermaid bare ids inside a subgraph are not grouped yet — a node that appears in the block only as a naked id, with no shape and no edge, is imported but left outside the group.
RUSTSEC-2023-0071 stands against rsa 0.9.10, which ssh-key 0.6.7 pulls in for the RSA key types. It is a timing sidechannel in RSA private-key operations — decryption and signing — with no fixed crate release to move to. Key generation is all Notepatra asks of it, and Ed25519 and ECDSA use different crates entirely, so it is carried as a documented ignore in rust-core/.cargo/audit.toml. One more reason the default is Ed25519.

Verification

test_passwordgen 67 · test_passwordgen_panel 99 · test_npd_parser 117 · test_mermaid_import 44 · test_diagram_view 19 · 175 Rust tests. Full offscreen ctest is 79/79 green.

Release page Full changelog Commits

v0.1.128

2026-08-20 · Most password meters score how complicated the result looks. This one reports how many values it could have produced. The built-in Password Generator arrives — random characters or a 2,048-word passphrase, offline, in every build including Lite. · Lite (default, bare) + Full · Linux · macOS (incl. Apple Silicon) · Windows

Release page Full changelog Commits

🎉 100 releases

v0.1.100 — one hundred shipped iterations, each one local-first, no telemetry, no account. Thank you for being here.

See every release on GitHub
Full version history from v0.1.0 onwards — release notes, signed artifacts, SHA-256 checksums, cosign signatures, SLSA build provenance.
github.com/singhpratech/notepatra/releases →

v0.2.0 — next milestone

LSP support · Plugin ecosystem · More outreach · Community feedback cycle

FAQ

Frequently asked questions

Quick answers. For deeper docs see the README and SECURITY.md.

What is Notepatra?

Notepatra is a native Qt5 + QScintilla code editor with an original C++17/Rust core for hot paths (memory-mapped I/O, Aho-Corasick search, Myers diff, formatters). Runs on Linux x64 / ARM64, macOS Apple Silicon, and Windows x64 from a single codebase. ~13 MB bare executable, no Electron runtime, no telemetry, no mandatory account. Local-first AI is built in: pick from Ollama, llama.cpp, OpenRouter, OpenAI, Azure OpenAI, or Ollama Cloud. As of v0.1.129: 238 file types · 82 language lexers, a Data Analyst mode that works out of the box on CSV files and an in-memory SQLite engine (the Full download bundles the DuckDB v1.1.3 engine on every platform), agentic Coding Mode with read / list / search / write / apply_diff tools, Cursor-style Composer + Ctrl+I inline edit, multi-cursor, AI-driven git tools (read-only: status / diff / log / branch / show).

Is it really free? What's the catch?

No catch. GPL-3.0, no telemetry, no analytics, no API key, no enterprise tier, no subscription. Source on GitHub. The "catch" is that it's a one-person open-source project — no SLA, no warranty, no support contract. See the disclaimer in the footer.

Can I install Notepatra at my company?

Yes — same license posture as Notepad++, GIMP, vim, and Linux (all GPL). Notepatra is a standalone end-user editor: under the GPL, using Notepatra as an editor does not place obligations on the files you edit (see the FSF GPL FAQ), and it doesn't phone home. For IT, legal, or procurement teams reviewing the install: see the For Enterprise page — plain-English explainer, supply-chain provenance (SHA-256 + cosign + SLSA), and a copy-paste block for your software-acceptance request.

How big is the binary?

The bare executable is ~13 MB (13.4 MB on Linux x64) across every platform. v0.1.129 download sizes: 4.7 MB Linux x64 tar.gz · 4.7 MB Linux ARM64 tar.gz · 28.0 MB macOS DMG · 43.9 MB Windows MSI / 33.0 MB NSIS / 37.8 MB portable zip. Installed on Windows the on-disk footprint grows to ~75-85 MB because the MSI extracts bundled Qt5 + QScintilla DLLs out of the compressed payload — normal for every Qt-based installer. Linux stays tiny (~13 MB on disk) because Qt is a system package; macOS and Windows bundle Qt + QScintilla DLLs for portability.

Does my code go to the cloud?

By default no — Notepatra is local-first. Pick a local AI backend (Ollama on localhost:11434 or llama.cpp's llama-server on localhost:8080) and nothing leaves your machine. The llama.cpp entry also accepts a user-configured URL, so you can route it to any OpenAI-compatible server you've installed (any OpenAI-compatible server — those are separate programs you install and license). Cloud backends (OpenRouter, OpenAI, Azure OpenAI, Ollama Cloud) are opt-in from the AI dock dropdown. Even when you opt in, the v0.1.55 credential scrubber strips API keys / tokens / private-key blocks from any code or chat content before it leaves the machine, and the privacy "Share file with AI" toggle (default OFF) controls whether the active editor file is even visible to the model. Verifiable with strace.

What languages does Notepatra highlight?

238 file types via 82 language lexers as of v0.1.129 — Python, JavaScript, TypeScript, C, C++, C#, Java, Kotlin, Rust, Go, Dart, Solidity, Zig, Vala, Hack, Julia, R, Protobuf, F#, HCL/Terraform, Thrift, GraphQL, GDScript, Nim, Cython, Mojo, Crystal, Elixir, Scala, Groovy, Apex, HTML, CSS, SQL (6 dialect presets), JSON, JSON5, YAML, TOML, Markdown, Bash, Fish, Nushell, Ruby, Perl, Lua, Fortran, Verilog, VHDL, MATLAB, LaTeX, BibTeX, Jinja, Liquid, Twig, Dockerfile, DotEnv, Gitignore, Pascal, CMake, Makefile, and more. Each lexer ships with comment / uncomment / block-comment syntax (Ctrl+Q / Ctrl+Shift+Q) and proper file-extension routing.

What file encodings are supported?

UTF-8 (with or without BOM), UTF-16 LE/BE, and UTF-32 LE/BE are auto-detected — including BOM-less UTF-16 from PowerShell and SQL Server exports, sniffed via null-byte patterns — with Latin-1 / Windows-1252 as the legacy fallback. BOMs survive a save round-trip, and the Encoding menu can reinterpret bytes or convert the save format.

How do I verify a download is genuine?

Every release ships with SHA-256 checksums, cosign signatures (Sigstore + Rekor), and SLSA build provenance. The install scripts verify SHA-256 automatically and refuse to install on mismatch. Full guide in SECURITY.md.

Will it open big files?

Yes — large files load fully. The Rust core uses memory-mapped loading (mmap2), which avoids a double read on open; the file is then held in the editor buffer (peaks at roughly 3x file size in RAM during load (~1-2x once loaded)). Files up to ~1.86 GB load fully; larger files open truncated and read-only. Files from 50 MB up to ~1.86 GB automatically disable lexer/syntax highlighting, auto-complete, word wrap, and indent guides to keep things snappy, but stay fully editable.

Can I write plugins?

Yes. Drop a .so/.dylib/.dll in ~/.config/notepatra/plugins/. The plugin C API is two functions: notepatra_plugin_name() and notepatra_plugin_run(text, len). Example in the README.

Who built it and why?

Built by Prateek Singh, constructed with Claude. The short version: Linux and macOS deserved a first-class native code editor, and 2026 deserved one with AI built in — local-first by default, cross-platform from one codebase, ~13 MB bare.

The code editor built for the AI era

Designed for people who write code.

Memory-mapped at every scale.

Private by design.

Built-in tools.

Notepatra

Notepatra Local AI

Linux x64

Linux ARM64

macOS Apple Silicon

Windows x64

Password Generator — passwords, passphrases, SSH keys NEW IN v0.1.129

MCP — your editor, readable by your AI 49 TOOLS · v0.1.129

AI Assistant (Ctrl+Shift+A)

Project Search (Ctrl+Shift+G)

Noter — meeting notes

Diagram tool (.npd)

AI Interaction Log

Rust-Powered Core

Safe auto-update

Insert Date / Time

Clickable status bar

Clean menu organization

Compare with word-level diff

Session Persistence

File Change Detection

Macro Recording

238 File Types

3 Themes + Color Tags

Plugin System

Find & Replace

JSON Tools

HTML Tools

Bracket Tools

SQL Formatter

Compare / Diff

Git Integration

Built-in Terminal

REST Client

Hex Editor

Password Generator

SHA-256 checksums

Cosign signatures (Sigstore)

SLSA build provenance

Rust safety + cargo audit

Zero telemetry

Responsible disclosure