The complete feature list
Simple when you open it.
Powerful when you ask.
Syncphonia keeps the writing surface calm, then reveals deeper tools in context. Everything below is built around the same honest file: your Markdown.
.md stays canonical
15 days free
Core works offline
One quiet interface
Depth without clutter.
The canvas stays dedicated to the document. Everyday actions remain close at hand. Deeper tools open in a focused panel or command search, then get out of the way.
Direct visual editing
Headings, paragraphs, emphasis, links, quotes, lists, dividers, tables, and tasks render where you write.
Exact source mode
Open the Markdown with line numbers, wrapping, syntax color, and on-demand highlighting for common code languages.
Quick insert and formatting
Add blocks from a small insert menu and format selected text without leaving the page.
Code, math, and diagrams
Write highlighted code, inline or display math, and Mermaid diagrams that render only when used.
Callouts and references
Use notes, warnings, footnotes, wiki links, citations, and bibliographies while keeping portable source.
Images beside the document
Paste or drop an image and save it nearby with a relative link that travels with the file.
Find and replace
Search the complete document, step through matches, and preview replacements before applying them.
Local writing review
Check readability, repetition, long sentences, passive phrasing, and filler words without sending text away.
Dedicated reading view
Review a polished document without the risk of an accidental edit.
Sixteen calm themes
Choose from four uncluttered collections—Clear & light, Warm & familiar, Soft dark, and Deep night—with four distinct themes in each.
Theme studio
Start from any built-in, create your own collection, preview and check changes, or safely import and export a personal theme.
Typography controls
Adjust typeface, size, line height, paragraph spacing, and page width to suit the document and your eyes.
Focus mode
Quiet everything except the paragraph or block you are actively shaping.
Typewriter mode
Keep the current line comfortably centered as the document grows.
Context that follows you
Move between reading, visual editing, and source near the same part of the document.
Outline and live statistics
Jump by heading and keep word count, character count, and reading time in view.
Presentation view
Turn headings into a clean full-screen presentation without creating a separate slide file.
Ordinary folders
Open one folder or bring several locations into the same library without moving their contents.
Folder-wide search
Find text across the library with the file, line, and matching context shown clearly.
Links and backlinks
Follow normal Markdown links and wiki links, then see every document that points back.
Tags and properties
Filter the front matter and inline tags already in your files, with useful searches you can save.
Safe file changes
Preview create, rename, move, duplicate, and trash operations, including the links that will be updated.
Daily notes and templates
Start recurring work from your own Markdown patterns and keep important notes bookmarked.
Graph view
Explore links and clusters in a bounded visual map that stays responsive in a large library.
Canvas
Arrange notes and ideas spatially while every note remains a normal Markdown file.
Plain Markdown is canonical
Your document remains useful in any text editor and never depends on Syncphonia to exist.
Front matter preserved
YAML metadata stays byte-for-byte intact while the visual editor works on the document body.
Exact change review
Inspect added and removed lines, line endings, and metadata changes before accepting a transformation.
External-change protection
When another app changes a file, compare both versions before reloading or saving over it.
Atomic saves and autosave
Write safely, save once after a pause, and prevent a pending save from crossing into another document.
Local version history
Compare or restore earlier content with integrity checks and protection against overwriting newer work.
Git awareness
See the current branch, status, and file history when a folder already uses Git. Git is never required.
Safer untrusted files
Author HTML cannot execute inside exports or the privileged print surface.
Offline operation
Open, read, edit, search, organize, and export without contacting a Syncphonia server.
License account kept separate
A passwordless account starts the trial and manages the license. It does not store, index, or synchronize your documents.
Private folder sync
Synchronize through a folder you choose while keeping the working documents local and readable.
End-to-end encryption
Encrypted revisions use opaque names, authenticated contents, and a key made from your passphrase on your device.
Visible conflicts
Concurrent revisions remain separate until you explicitly choose, combine, or preserve both versions.
No silent background polling
Sync runs when you ask, helping the app stay quiet on the processor, memory, network, and battery.
Portable one-file HTML
Styles, local images, code colors, math styling, and fonts can travel in one offline file.
Print and PDF
Use the print system for paper or PDF with clean, document-only styling.
Word, EPUB, LaTeX, and OpenDocument
Install the verified local export engine with one click when you first need it. It runs only during export, keeps documents on your device, and can be removed anytime.
Export profiles
Save contents, numbering, citation, template, and format choices for repeatable output.
Citations and bibliography
Work with BibTeX or CSL JSON and carry references through supported outputs.
Diagram-aware output
Render Mermaid diagrams for HTML, PDF, presentation, and site output.
Static sites
Turn one or several Markdown pages into a ready-to-host folder with portable assets and links.
Encrypted site package
Protect a site bundle with a passphrase before it leaves the app.
Off by default
The full editor works without AI, a model account, or a model connection.
One clear assistant
Use private writing review, a model on your device, or a cloud provider from the same calm, task-first panel.
Key-only cloud setup
Choose a familiar provider and enter your API key. Syncphonia fills in the connection and model while keeping the exact details inspectable.
Right-sized local models
Check this device, compare a short list of open models, and see a conservative recommendation before anything downloads.
Install only when asked
No model engine or model is bundled. Open the official installer only when you request it, then download the exact model you chose with visible progress and pause.
Test before use
A short document-free check confirms that a downloaded local model can load and respond before Syncphonia selects it.
Useful writing actions
Clarify, adjust tone, summarize, outline, extract tasks, explain, or give a custom instruction.
Review every change
Model output appears as an exact Markdown proposal to accept or reject. Nothing changes before your decision.
Structure protection
Links, citations, code, metadata, and document structure are checked before a change can replace source.
Visible privacy boundary
Review the selected or whole-document scope, exact destination, network boundary, and byte count before processing.
Local authorship record
Track suggestions accepted through Syncphonia separately from direct edits, including operating-system writing tools, without storing prompt or document text.
Graceful recovery
Stop a request, resume a local download, retry a smaller model, or correct a rejected key without changing the document or silently switching providers.
Lightweight desktop shell
Use the operating system's webview instead of bundling a second browser engine.
Syncphonia Light for the browser
Use a real, free, lightweight local Markdown reader and editor without installing anything. It is not a demo or a replacement for the full desktop app, and you can install it for offline use when you want.
Files stay where you put them
A granted file or folder stays in the location you chose. Other browsers use private storage on this device—never a Syncphonia server.
Ordinary Markdown copies
Choose Download Markdown copy anytime to export the current document as a normal .md file.
Command search
Find actions by name without filling the canvas with permanent controls.
Shared editing
Work through a local tab, direct peer connection, or a server you choose, with presence, roles, comments, suggestions, and visible conflicts.
Offline collaboration queue
Keep local edits while disconnected and reconcile them when the shared session returns.
Permissioned extensions
Add commands, panes, file actions, or network actions inside a sandbox with grants you can inspect and revoke.
Mobile capture
Save a quick note, reading item, or workspace search offline, then choose when to file it into the library.
Accessible by keyboard
Named controls, visible focus, semantic tabs, live feedback, and shortcuts cover the core experience.
Heavy tools load only when opened
The core stays small while diagrams, publishing, knowledge, history, AI, collaboration, and extensions remain available on demand.
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