Install OnlyOffice Desktop Editors on Ubuntu: APT Repo, .deb, and Snap

OnlyOffice Desktop Editors is a free office suite for Ubuntu that edits local docx, xlsx, pptx, PDFs, and PDF forms without a browser tab. It is a common pick when you want Microsoft Office–friendly layout and formatting instead of—or alongside—LibreOffice on a Ubuntu Desktop machine.

This guide covers how to install OnlyOffice on Ubuntu from the official APT repository (the path Ascensio documents for Debian and Ubuntu), a direct .deb, Snap, and Flatpak. I ran the repository install on Ubuntu 25.04 and finished with 9.4.0-129 under /opt/onlyoffice. The install briefly stalled on ttf-mscorefonts-installer until dependencies were reconciled—you will see that fix below. This article is about Desktop Editors, not OnlyOffice Docs (the self-hosted collaboration server).

Tested on: Ubuntu 25.04 (Plucky Puffin); kernel 6.14.0-37-generic.

NOTE

OnlyOffice Docs (Document Server) is a different product—it runs as a web service for Nextcloud and similar stacks. Community tutorials that install onlyoffice-documentserver target servers, not the desktop app. This page installs onlyoffice-desktopeditors for local editing.

Quick command summary

Task	Command
Add official APT repo	See Step 1 below
Install from repo	`sudo apt install -y onlyoffice-desktopeditors`
Check version	`desktopeditors --version`
Install direct `.deb`	`wget -O onlyoffice.deb https://download.onlyoffice.com/install/desktop/editors/linux/onlyoffice-desktopeditors_amd64.deb && sudo apt install -y ./onlyoffice.deb`
Install via Snap	`sudo snap install onlyoffice-desktopeditors`
Install via Flatpak	`flatpak install flathub org.onlyoffice.desktopeditors`
Launch (terminal)	`desktopeditors`
Remove (keep config)	`sudo apt remove onlyoffice-desktopeditors`
Completely remove	`sudo apt purge -y onlyoffice-desktopeditors`

Prerequisites

Ubuntu 22.04 LTS, 24.04 LTS, or newer (25.04 tested here). Only 64-bit amd64 is published in the main Debian repo; ARM builds are separate downloads on onlyoffice.com.
sudo and outbound HTTPS to download.onlyoffice.com.
A desktop session (GNOME, KDE, Xfce, etc.) if you want the GUI—Server images need a desktop stack first.
Roughly 1.3 GB under /opt/onlyoffice after install, plus download cache during apt install.
Optional: remove LibreOffice first when you only want one suite—the remove LibreOffice on Ubuntu guide covers purge and autoremove.

OnlyOffice is not in the default Ubuntu archive; you add Ascensio’s vendor repo or use Snap/Flatpak. The must-have Ubuntu apps roundup lists Snap as a quick path when you are still choosing an office stack.

Step 1: Add the official OnlyOffice APT repository

Ascensio publishes Desktop Editors in a Debian squeeze suite that also works on Ubuntu derivatives. Import the signing key and list file:

bash


sudo apt-get install -y gnupg wget
mkdir -p -m 700 ~/.gnupg
gpg --no-default-keyring --keyring gnupg-ring:/tmp/onlyoffice.gpg \
  --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys CB2DE8E5
chmod 644 /tmp/onlyoffice.gpg
sudo chown root:root /tmp/onlyoffice.gpg
sudo mv /tmp/onlyoffice.gpg /usr/share/keyrings/onlyoffice.gpg
echo 'deb [signed-by=/usr/share/keyrings/onlyoffice.gpg] https://download.onlyoffice.com/repo/debian squeeze main' \
  | sudo tee /etc/apt/sources.list.d/onlyoffice.list
sudo apt-get update

On Ubuntu 25.04 the key import and apt update for OnlyOffice completed without errors. The key owner line looked like this:

text

gpg: key 8320CA65CB2DE8E5: public key "Ascensio System Limited (ONLYOFFICE) <[email protected]>" imported

Confirm the candidate version before you install:

bash

apt-cache policy onlyoffice-desktopeditors

text


onlyoffice-desktopeditors:
  Installed: (none)
  Candidate: 9.4.0-129
  Version table:
     9.4.0-129 500
        500 https://download.onlyoffice.com/repo/debian squeeze/main amd64 Packages

Step 2: Install OnlyOffice from APT

bash

sudo apt-get install -y onlyoffice-desktopeditors

The package is large (about 348 MB in the apt cache on my host). Near the end of a successful run you should see:

text


Setting up gstreamer1.0-plugins-ugly:amd64 ...
Setting up gstreamer1.0-libav:amd64 ...
Setting up onlyoffice-desktopeditors (9.4.0-129) ...

Verify:

bash

dpkg -l onlyoffice-desktopeditors
desktopeditors --version

text

ii  onlyoffice-desktopeditors 9.4.0-129    amd64        Desktop editors for text ...
ONLYOFFICE ver. 9.4.0.129

The main binary is /usr/bin/desktopeditors (symlink to onlyoffice-desktopeditors). Application files live under /opt/onlyoffice/desktopeditors/.

If install stalls on `ttf-mscorefonts-installer`

OnlyOffice recommends ttf-mscorefonts-installer for Arial and Times New Roman metrics. On my VM the postinst script spent several minutes downloading .exe font payloads from SourceForge mirrors. Some mirrors failed with:

text

ERROR: cannot verify excellmedia.dl.sourceforge.net's certificate ...
  Issued certificate not yet valid.

That showed up alongside System clock synchronized: no in timedatectl—the same class of clock-skew issue that breaks other vendor repos until NTP catches up.

Workarounds:

Sync time, then finish configuration:

bash


sudo timedatectl set-ntp true
echo "ttf-mscorefonts-installer msttcorefonts/accepted-mscorefonts-eula boolean true" | sudo debconf-set-selections
sudo DEBIAN_FRONTEND=noninteractive apt-get install -f -y

Skip the font recommend if you do not need Microsoft core fonts immediately:

bash

sudo apt-get install -y --no-install-recommends onlyoffice-desktopeditors

If dpkg left OnlyOffice half-configured (iU status), repair with:

bash

sudo apt-get install -f -y

That command configured gstreamer1.0-libav and onlyoffice-desktopeditors on my host after the font installer was removed.

Step 3: Launch OnlyOffice Desktop Editors

Graphical: open the app menu → Office → ONLYOFFICE (or search “OnlyOffice”).

After a successful install on Ubuntu 25.04, opening ONLYOFFICE from the app menu lands on the home screen with Document, Spreadsheet, and Presentation tiles, sidebar links for local files and templates, and a Select file drop zone:

ONLYOFFICE Desktop Editors home screen on Ubuntu with DOCX XLSX and PPTX create tiles sidebar navigation and Select file button

Terminal:

bash

desktopeditors

Open a specific file:

bash

desktopeditors ~/Documents/report.docx

The .desktop entry registers dozens of MIME types—docx, xlsx, pptx, ODF, PDF, and more—so you can set OnlyOffice as the default handler in Settings → Apps → Default applications after install.

User settings and caches land under ~/.config/onlyoffice, ~/.local/share/onlyoffice, and ~/.cache/onlyoffice once you run the app.

Alternative: install the official `.deb` package

When you cannot add a repository (locked-down image, one-off VM, or policy that forbids extra sources.list entries), download the current amd64 package from Ascensio:

bash


cd ~/Downloads
wget -O onlyoffice-desktopeditors_amd64.deb \
  https://download.onlyoffice.com/install/desktop/editors/linux/onlyoffice-desktopeditors_amd64.deb
sudo apt install -y ./onlyoffice-desktopeditors_amd64.deb

apt install ./file.deb resolves the same dependency chain as the repository package. The .deb URL returned HTTP 200 with content-length: 364644136 (~348 MB) when I checked headers—expect a long download on slow links.

You can still add the APT repo later for apt upgrade without reinstalling from scratch.

Alternative: Snap package

Canonical’s Snap store carries the same product name:

bash

sudo snap install onlyoffice-desktopeditors

snap info onlyoffice-desktopeditors showed 9.4.0 on latest/stable (June 2026) at about 1.06 GB installed size. Snap confinement is convenient on Ubuntu Desktop when you do not want a vendor sources.list entry.

Remove later with:

bash

sudo snap remove onlyoffice-desktopeditors

Do not install both the deb and Snap builds unless you intentionally want two copies—they register similar menu entries.

Alternative: Flatpak

Flatpak distributes OnlyOffice as org.onlyoffice.desktopeditors on Flathub. Enable Flathub once, then:

bash

flatpak install flathub org.onlyoffice.desktopeditors
flatpak run org.onlyoffice.desktopeditors

Flatpak builds sometimes trail the .deb by a short window after major releases—fine for trials, but the APT repo is usually first for x86_64 Ubuntu.

Uninstall:

bash

flatpak uninstall org.onlyoffice.desktopeditors

Uninstall OnlyOffice

Ascensio’s docs distinguish remove (keep local config) from purge (delete package metadata).

Keep configuration files:

bash

sudo apt-get remove onlyoffice-desktopeditors

Remove configuration too:

bash

sudo apt-get purge -y onlyoffice-desktopeditors
sudo apt-get autoremove -y

A purge dry-run on my host reported:

text


The following packages will be REMOVED:
  onlyoffice-desktopeditors*
Purg onlyoffice-desktopeditors [9.4.0-129]

Drop the repository when you no longer need updates:

bash

sudo rm -f /etc/apt/sources.list.d/onlyoffice.list /usr/share/keyrings/onlyoffice.gpg

Delete personal data only when you are sure you do not need it:

bash

rm -rf ~/.config/onlyoffice ~/.local/share/onlyoffice ~/.cache/onlyoffice

If anything remains under /opt/onlyoffice after a broken uninstall, Ascensio documents manual cleanup of that path and stale .desktop files—normally apt purge handles it.

Troubleshooting

Symptom	Likely cause	Fix
`onlyoffice-desktopeditors` stuck at `iU` / `dpkg --configure` hangs	`ttf-mscorefonts-installer` downloading fonts	Sync NTP; pre-accept EULA with `debconf-set-selections`; run `sudo apt install -f -y`
SSL certificate not yet valid on SourceForge mirrors	Clock behind real time or TLS inspection	`sudo timedatectl set-ntp true`; retry, or install with `--no-install-recommends`
`desktopeditors: command not found` after install	Package not fully configured	`sudo apt install -f -y`; check `dpkg -l onlyoffice-desktopeditors` shows `ii`
Two OnlyOffice icons in the app menu	Both Snap and `.deb` installed	Remove one channel (`snap remove` or `apt purge`)
Wrong architecture / no amd64 package	ARM or 32-bit CPU	Use ARM build from OnlyOffice download page or AppImage where published
Cannot open `docx` by double-click	MIME default still LibreOffice	Settings → Default applications, or `xdg-mime` default

References

Summary

To install OnlyOffice on Ubuntu, add Ascensio’s signed download.onlyoffice.com repository, run sudo apt install onlyoffice-desktopeditors, and launch ONLYOFFICE from the Office menu or with desktopeditors. Version 9.4.0-129 landed under /opt/onlyoffice on Ubuntu 25.04. If apt pauses on Microsoft core fonts, sync time or use --no-install-recommends, then sudo apt install -f. For repo-less installs, use the official amd64 .deb; Snap and Flatpak suit sandboxed setups. This guide covers Desktop Editors only—pair it with the site’s LibreOffice removal walkthrough when you want a single local office suite.

Frequently Asked Questions

1. How do I install OnlyOffice on Ubuntu?

Add the official OnlyOffice APT repo at download.onlyoffice.com with the CB2DE8E5 GPG key in /usr/share/keyrings/onlyoffice.gpg, run sudo apt update, then sudo apt install onlyoffice-desktopeditors. Launch from the app menu or with desktopeditors.

2. Is OnlyOffice free on Ubuntu?

OnlyOffice Desktop Editors is free for personal and internal business use under the AGPL license. The APT, Snap, and Flatpak packages install the desktop suite—not the paid OnlyOffice Docs collaboration server.

3. What is the difference between OnlyOffice Desktop Editors and OnlyOffice Docs?

Desktop Editors is the local Word, Excel, and PowerPoint-style app for your PC. OnlyOffice Docs is a server product for browser editing and Nextcloud integration. This guide installs Desktop Editors only.

4. Can OnlyOffice replace LibreOffice on Ubuntu?

Yes. OnlyOffice opens docx, xlsx, and pptx with strong Microsoft Office compatibility. Purge LibreOffice first if you want one suite, then install OnlyOffice from apt or Snap. See the site guide on removing LibreOffice for a clean swap.

5. Which install method is best for OnlyOffice on Ubuntu?

The official APT repository is best for automatic updates and desktop integration. Use the direct .deb when you cannot add a repo. Snap and Flatpak are fine on immutable or sandboxed setups but can lag the .deb release slightly.

6. Why does apt hang on ttf-mscorefonts-installer during OnlyOffice install?

OnlyOffice recommends Microsoft core fonts. The ttf-mscorefonts-installer postinst downloads fonts from SourceForge and can stall on SSL errors or slow mirrors. Pre-accept the EULA with debconf-set-selections, sync NTP, or skip the recommend and run sudo apt install -f after fonts finish.

7. Does OnlyOffice support ARM Ubuntu?

Official Desktop Editors builds target amd64 in the Debian squeeze repo. Ascensio also publishes ARM packages and AppImage builds—check the OnlyOffice download page and release blog for aarch64 when you are not on x86_64.

8. How do I uninstall OnlyOffice from Ubuntu?

Run sudo apt purge onlyoffice-desktopeditors for the APT install. Remove /etc/apt/sources.list.d/onlyoffice.list and /usr/share/keyrings/onlyoffice.gpg if you no longer need updates. Delete ~/.config/onlyoffice only when you do not need local settings.