Free while in alpha · No sign-up

Write. Review.
Deliver.

A full word processor that runs in your browser. Styles, tables, track changes, comments, references and mail merge, with the Word files you already use. Or download it for Mac and Windows.

Open SynDoc → Download for Mac or Windows

Your documents never leave your computer. Nothing to install.

Your Word files

Open the documents you already have

DOCX is SynDoc's own format, so styles, tables, headers and footers, comments and tracked changes come through and save straight back, ready to open in Word.

.docx.doc.odt.rtf.html.md.txt→ PDF
DOCXopens and saves natively, so files go back to Word users as they came
.docolder Word 97–2003 documents open too
PDFexport finished documents to PDF in one step
If you know Word, you know SynDoc

The ribbon, styles and shortcuts you expect

Home, Insert, Layout, References, Mailings and Review, laid out the way you already work.

Aa

Styles

A live styles gallery, a Styles pane and themes, so a whole document changes in one click.

TABLE

Tables

Table styles with banded rows, merged cells, header rows that repeat on every page, and sorting.

ABC

Spelling and grammar

Suggestions as you type, a thesaurus and word count, plus AutoCorrect and smart quotes.

TRACK

Track changes and compare

See every insertion and deletion, accept or reject them, and compare two versions of a document.

NOTE

Comments

Comments in the margin or a pane, with replies and resolve, so feedback stays with the text.

TOC

Table of contents

Built from your headings and updated in one click, with page numbers and leaders.

CITE

Footnotes and citations

Footnotes, endnotes, captions and a bibliography in APA, MLA, Chicago or IEEE.

PAGE

Page layout

Margins, columns, section breaks, headers and footers, page numbers and watermarks.

PICT

Pictures and shapes

Crop and recolour pictures, add shapes and text boxes, and wrap text around them.

MERGE

Mail merge

Merge letters, envelopes and labels from a CSV list of names and addresses.

PDF

Print and PDF

Print or export to PDF, and open or save ODT, RTF, HTML, Markdown and plain text.

15

15 interface languages

English, Spanish, Portuguese, German, Chinese, Japanese and more. It follows your system language.

Start a document free →
Take the tour

A real word processor

Real SynDoc screens with its sample handbook. Switch between them to see each part of the app.

SynDoc showing The Open Studio Handbook, with the Home ribbon tab, the Styles gallery and the Navigation pane listing the document's headings.
Writing. The Home tab, a live Styles gallery and a Navigation pane built from your headings.
SynDoc's References ribbon tab, with a footnote at the bottom of the first page under a table.
References. Tables of contents, footnotes, citations, captions and indexes from the References tab.
SynDoc's Review tab with track changes on: replaced words shown struck through and underlined, and a comment in the Comments pane.
Review. Track changes and comments, with accept, reject, reply and resolve.
SynDoc's Layout tab with both pages of the handbook side by side, including a styled table.
Layout. Margins, columns, breaks and spacing, with pages side by side as they will print.
SynDoc's Insert ribbon tab with tables, pictures, shapes, SmartArt, charts, headers, footers and equations.
Insert. Tables, pictures, shapes, charts, links, headers and footers, and equations.
The handbook in SynDoc's dark theme, with the Navigation pane open.
Dark mode. A dark theme that's easy on the eyes for long writing sessions.
Privacy

Your documents never leave your computer

Contracts, CVs, reports and letters stay on your own device. SynDoc opens, edits and saves everything locally, in the browser or in the app.

No uploads

The online version works on files inside your browser. Nothing is sent to us.

Works offline

Once it has loaded, SynDoc keeps working without an internet connection.

No account, no subscription

Nothing to sign up for, no licence server and no telemetry.

Standard files

DOCX, ODT and PDF in and out, so your work is never locked in.

Get SynDoc

Use it online, or download it

Version 0.5.0 alpha. Free, with no account. The online version is the quickest way to start.

Recommended

Online

Any computer · Chrome or Edge
  • Nothing to install
  • Always the latest version
  • Your files stay on your computer
Open SynDoc

Mac

Apple silicon (M1 or newer) · 22 MB
  • Runs offline
  • Drag to Applications to install
Download for Mac
First time opening it
  1. Open the DMG and drag SynDoc to Applications.
  2. Open SynDoc. macOS says it can't check the app; click Done.
  3. Go to System Settings › Privacy & Security, scroll down and click Open Anyway.

Windows

Windows 10 or 11, 64-bit · 42 MB
  • Runs offline
  • Portable: unzip and run
Download for Windows
First time opening it
  1. Unzip the folder anywhere and open syndoc.exe.
  2. If Windows shows "Windows protected your PC", click More info.
  3. Click Run anyway.
FAQ

Questions, answered

Is SynDoc really free?

Yes. SynDoc is free while it's in alpha, with no account and no subscription.

Can it open my Word files?

Yes. DOCX documents open and save with their styles, tables, headers and footers, comments and tracked changes, and the files you save open in Word. Older .doc files open too. Charts and SmartArt from Word aren't fully kept yet, so check documents that rely on them.

Are my files uploaded anywhere?

No. The online version opens files straight from your computer and works on them in the browser. Nothing is sent to Syntera Labs.

Can I write a thesis or report with it?

Yes. Headings build a table of contents, and footnotes, captions, cross-references and a bibliography in APA, MLA, Chicago or IEEE are all on the References tab.

Which browser should I use?

Chrome or Edge on a recent computer give the best results. For very long documents, use the Mac or Windows app.

What does alpha mean?

SynDoc is new and improving every week. Save your work often and keep a copy of important documents.

Your blank page is ready

Open SynDoc in your browser. It's free, private and nothing to install.

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