Free · No sign-up · Runs in your browser

Altto Office: a free office suite in your browser.

Write documents, design flyers and newsletters, and edit PDFs, then save them in the formats Microsoft Office uses. No account, nothing to install, and your files never leave your device.

Word alternative

Altto Write

A word processor for letters, CVs, essays and reports. Opens Word, OpenDocument and RTF files with their headings, fonts, lists, tables and pictures, and saves Word or PDF.

Opens .docx, .odt, .rtf, .txt
CV, letter, report and essay templates
Save as Word or PDF

Open Altto Write → Publisher alternative

Altto Layout

A desktop-publishing editor for flyers, posters, newsletters and cards. Opens Microsoft Publisher (.pub) files with their layout, and can design a page for you from a description.

Opens .pub files, layout and all
Templates and an AI designer
Print-ready PDF with bleed

Open Altto Layout → PDF editor

Edit PDF

Change the words in a PDF in its own font, add text, pictures and shapes, and fill in or sign forms, without Acrobat.

Edit existing text
Add text, images and signatures
Nothing uploaded

Open Edit PDF →

Office tools

Open, convert and fix Office files

Everything you need around Word, Excel, PowerPoint and Publisher files, each running on your own device.

Updated 14 October 2026

Word documents

Excel spreadsheets

PowerPoint presentations

Publisher files

Everyday office jobs

How it compares

Altto Office, Microsoft 365 and Google Docs

Altto is for getting everyday documents done quickly and privately. If you need advanced features, the big suites still do more.

	Altto Office	Microsoft 365	Google Docs
Price	Free	Paid subscription for the desktop apps	Free with a Google account
Account needed	No	Yes (Microsoft account)	Yes (Google account)
Install anything	No, runs in the browser	Desktop apps install; web apps don’t	No
Your files	Stay on your device	Usually saved to OneDrive	Saved to Google Drive
Opens Publisher (.pub) files	Yes	No, since October 2026	No
Advanced features (macros, mail merge, tracked changes)	Not yet	Yes	Some

FAQ

Frequently asked questions

Is Altto Office really free?

Yes. Every app and tool on this page is free, with no sign-up, no watermark and no limit on how many documents you open or save. Altto is paid for by the ads on its pages.

Do I need an account or to install anything?

No. Everything runs in your web browser on a computer, Chromebook, tablet or phone. Open the page and start; there is nothing to download or sign in to.

Are my files uploaded?

No. Altto’s apps open, edit and save your files on your own device, in the browser tab, so your documents never reach a server. The only exception is the optional AI designer in Altto Layout, which sends the description you type (never a file) to make a design.

Can it replace Microsoft Office?

For everyday work, often yes: writing and editing letters, CVs, essays and reports, making flyers and newsletters, and handling PDFs, with files saved in the formats Office uses. It doesn’t yet do advanced features such as macros, mail merge, tracked changes or a spreadsheet editor, so if you rely on those you’ll still want Office.

Will files I make open in Word?

Yes. Altto Write saves standard Word (.docx) files that open in Microsoft Word, Google Docs, LibreOffice and Apple Pages, and every app can save a PDF that looks the same everywhere.

Is there a spreadsheet or slides editor?

Not yet. For now Altto converts Excel and PowerPoint files to and from PDF (see the tools above). A spreadsheet editor and a slides editor are what we’re working on next.

Microsoft, Word, Excel, PowerPoint and Publisher are trademarks of Microsoft Corporation. Altto is not affiliated with or endorsed by Microsoft.

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