Simplified office suite for macOS because I hate using Numbers and needed functionality of a PDF editor without the cost. More to come.
One window with tabs. Home is the first tab, and spreadsheets, PDFs, documents and presentations open as tabs beside it. Right-click a tab to move it to its own window, or press ⇧⌘N for a new one.
| Application | For | Files | Status |
|---|---|---|---|
| Ledger | Spreadsheets | Excel (.xlsx, .xlsm, .xls), .csv, .tsv, OpenDocument (.ods), Numbers (.numbers) |
Available |
| Hanko | PDF editing | .pdf |
Available |
| Sumi | Documents | Word (.docx), Markdown (.md) |
Available |
| Slides | Presentations | PowerPoint (.pptx) |
Available |
- Excel formulas and formatting
- Sort, AutoSum, and find and replace
- Print, and export as PDF
- Opens and saves Excel, CSV and TSV files, and opens Numbers, OpenDocument and older Excel files (saved as
.xlsx). If a file has something Ledger can't keep, such as macros, Ledger tells you when it opens and saves a copy instead of overwriting the original.
- Add text, highlights and your signature
- Fill in forms
- Redact: removes what's under the box from the file, like Adobe Acrobat Pro. Search for text and redact every match at once.
- Rotate, delete and reorder pages, combine PDFs, turn photos into a PDF, and print
- Word documents and Markdown: styles, fonts, lists, tables and images
- Page setup: paper size, margins and page numbers
- Find and replace, spellcheck, print, and export as PDF
- If a Word file has something Sumi can't keep, such as comments or tracked changes, Sumi tells you when it opens and offers to save a copy.
- Text, shapes, pictures and tables, with layouts and colour themes
- Speaker notes, and a full-screen slideshow (⌥⌘P)
- Print, and export as PDF
- If a PowerPoint file has something Slides can't keep, such as charts or animations, Slides tells you when it opens and offers to save a copy.
In order, with the next item first:
- Templates for documents and presentations
- More Ledger tools: borders, filters, conditional formatting, dropdown lists and charts
- iPhone photos (
.heic) in PDF from images - Notarized builds, so Zen Suzu opens without the Open Anyway step and installs its own updates
- Windows support: the same app, adjusted to run and fit on Windows
Not planned: .xlsb and other macro-enabled formats, and Apple Pages or Keynote files.
Download: get the latest .dmg from Releases. It runs on Macs with Apple silicon. Previews aren't notarized by Apple yet, so the first time you open Zen Suzu, click Done, then go to System Settings → Privacy & Security and click Open Anyway.
Updates: when it opens, Zen Suzu checks GitHub for a new version, at most once a day; you can turn this off in the Zen Suzu menu. When there is one, click Download on Home. Zen Suzu downloads the .dmg, checks it against the release's checksum and opens it. Quit Zen Suzu, drag the new Zen Suzu into Applications and choose Replace.
Build from source: requires Node.js 22.13 or newer and pnpm 10.
git clone https://github.com/Zedyas/zen-forge.git
cd zen-forge
pnpm install
pnpm package:macThe app is written to dist/mac-arm64/Zen Suzu.app. Drag it into /Applications. pnpm release:mac builds the .dmg instead.
Make Zen Suzu the default app for a file type: in Finder, select a .xlsx, .pdf, .docx or .pptx file, press ⌘I, choose Zen Suzu under Open with, then click Change All….
Every command is also in the menu bar and in the command palette (⌘K). Hover any toolbar button to see its name and shortcut.
| Tabs and windows | |
|---|---|
| ⇧⌘H | Home |
| ⌘1 … ⌘8 | Go to tab 1 to 8 (Home is tab 1) |
| ⌘9 | Go to the last tab |
| ⌃Tab / ⌃⇧Tab, or ⇧⌘] / ⇧⌘[ | Next / previous tab |
| ⌘W | Close tab (on Home, closes the window) |
| ⇧⌘N / ⇧⌘W | New window / close window |
| ⌘K | Command palette |
| Files and editing | |
|---|---|
| ⌘N | New spreadsheet |
| ⌘O | Open |
| ⌘S / ⇧⌘S | Save / Save As |
| ⌘P | |
| ⌘Z / ⇧⌘Z | Undo / Redo |
| ⌥⌘T | Show or hide the toolbar |
| ⌥⌘I | Show or hide the inspector |
| Ledger | |
|---|---|
| ⌘B / ⌘I / ⌘U | Bold / Italic / Underline |
| ⌘F | Find and replace |
| Hanko | |
|---|---|
| V · T · H · D · R · W | Select, Text, Highlight, Draw, Rectangle, White-out |
| S · X | Signature, Redact |
| ⌘L / ⌘R | Rotate page left / right |
| ⌘⌫ | Delete page |
| ⌘F | Find, and redact every match |
| ⌘= / ⌘- / ⌘0 | Zoom in / Zoom out / Actual size |
| Sumi | |
|---|---|
| ⌘B / ⌘I / ⌘U / ⇧⌘X | Bold / Italic / Underline / Strikethrough |
| Tab / ⇧Tab | Indent / outdent a list item |
| ⌘↩ | Page break |
| ⌘F | Find and replace |
| ⌘= / ⌘- / ⌘0 | Zoom in / Zoom out / Actual size |
| Slides | |
|---|---|
| ⌥⌘N | New slide |
| ⌥⌘P | Play the slideshow; → and ← move, Escape stops |
| ⌘B / ⌘I / ⌘U | Bold / Italic / Underline |
| ⌘C / ⌘V / ⌘D | Copy / Paste / Duplicate the selected objects |
| Arrow keys | Nudge the selection by 1 pt, or 10 pt with Shift |
pnpm dev # run the app with hot reload
pnpm test # unit tests (Vitest)
pnpm typecheck # TypeScript, strict mode
pnpm lint # ESLint, zero warnings allowed
pnpm build # production build into out/
pnpm package:mac # build and package Zen Suzu.app into dist/
pnpm release:mac # build the downloadable .dmg into dist/Releasing: update version in package.json and .github/release-notes.md, then push a tag such as v0.2.0. The Release workflow builds the .dmg on GitHub, records where it came from (checksum and build attestation) and creates a draft release to publish.
- Electron runs the app. The main process (
electron/main) owns windows, the native menu bar, file dialogs, file reads and writes, and the saved session. Every window loads the same React page; a window is a row of tabs that starts on Home. - The renderer (
src/renderer/src) is React 19 with Zustand stores. One store holds the window's tabs; each tab records which application edits it. The renderer reaches the file system only through thewindow.desktopbridge defined inelectron/preload, and a lint rule keeps that bridge insideservices/file. - Security. The page loads from a private
app://address under a strict Content Security Policy (no network, no eval), cannot navigate away or open windows, and gets no permissions beyond writing to the clipboard. The main process answers only that page. Electron fuses lock the packaged app to its own integrity-checked code. Seeelectron/main/security.ts. - Updates. Zen Suzu's only network use is the main process checking this repository's GitHub releases and, when you click Download, fetching the release's
.dmgandSHA256SUMS.txt(electron/main/updates.ts). The.dmgis checked against the checksum before it opens. - Printing. A module builds a printable copy of the document (
services/print), and the main process prints it or turns it into a PDF. Hanko prints page images with redaction boxes painted in, so no text under a box reaches the printer or a PDF saved from the print dialog. - Commands are defined once in
src/shared/commands.ts. The native menu, the command palette, keyboard shortcuts and toolbar tooltips all read from that list, and each command says which kind of tab it applies to. - Editors (
modules/sheets,modules/pdf,modules/docs,modules/slides) each export a handler withrun,saveandrelease. The shell finds the handler by the tab's kind, so saving or closing a tab works whether or not its editor is on screen. - Ledger uses HyperFormula for formulas, Glide Data Grid to draw the grid, ExcelJS for
.xlsx, Papa Parse for.csvand.tsv, and SheetJS for.xls,.odsand.numbers. - Hanko uses pdf.js to draw pages, pdf-lib to write every change back into the file, and MuPDF to apply redactions. MuPDF's WebAssembly module loads only when a redaction is saved.
- Sumi uses TipTap (ProseMirror) for editing, its own
.docxreader (modules/docs/io/docx-read.ts), docx to write.docx, and TipTap's Markdown support. A.docxthat Sumi saves reopens exactly as saved, and before saving over a file Sumi reads back what it wrote and asks first if anything would change. - Slides keeps each presentation as plain data (slides, text boxes, shapes, pictures and tables, in points), reads
.pptxwith pptxtojson and writes it with PptxGenJS.
electron/
main/ windows, menus, file access, settings and session
preload/ the window.desktop bridge
src/
shared/ applications, commands and types used by both processes
renderer/src/
app/ the window, tabs, Home, commands, document actions
ui/ shared components: tabs, toolbar, inspector, tooltips, icons
services/ file access, recent files, previews
modules/
sheets/ Ledger: workbook model, file formats, grid, toolbar
pdf/ Hanko: PDF engine, pages, markup, signatures, forms
docs/ Sumi: editor, styles and page setup, .docx and Markdown files
slides/ Slides: slide model, canvas, slideshow, .pptx files
scripts/ the app icon generator (pnpm icon:generate) and the license notices for releases
.github/ checks and release workflows, Dependabot, issue forms
patches/ fixes for Glide Data Grid, applied by pnpm install
vendor/ SheetJS, installed from a copy in the repository as its authors recommend
build/ the app icon used for packaging
The patch in patches/ changes two things in Glide Data Grid. It loads the cell editor up front instead of on first use; without that, the first key typed into a cell is sometimes dropped. It also lets row numbers skip hidden rows.
Suggestions are welcome as issues; code changes are made by the maintainer. See CONTRIBUTING.md, and report security problems privately as described in SECURITY.md.
Copyright © 2026 Zed Y.
Zen Suzu is licensed under the GNU General Public License v3.0 (GPL-3.0-only). You can use, study, change and share it; if you distribute Zen Suzu or a modified version, you must share its source under the same license.
It uses GPL-3.0 because the formula engine, HyperFormula, is GPL-3.0, and a packaged Zen Suzu.app includes it. Using one license for both keeps the source and the app under the same terms.
Redaction uses MuPDF, which is licensed under the GNU Affero General Public License v3.0 (AGPL-3.0). AGPL-3.0 and GPL-3.0 can be combined; MuPDF keeps its own license inside the app. AGPL adds one rule beyond GPL: if you run a modified MuPDF for users over a network, you must offer them its source. A desktop app like Zen Suzu is not affected. The other dependencies use permissive licenses (MIT, and Apache-2.0 for pdf.js and SheetJS) that are compatible with GPL-3.0.