COOL Days meetup in Berlin – community team building & partner day (October 3, 4 & 5)


We are glad to announce that our next Collabora Productivity meetup for 2022 will be on October 3, October 4 and October 5 in Berlin, Germany.

There are some special events prepared for our partners and customers where you will hear about the latest work in Collabora Online and Office, be able to give your input to help develop our road map, meet the engineers and see how you can become part of the project, all while having fun with the Collabora team!

We have prepared three days with activities in Berlin, Germany – you just need to book your flight and join us! We will meet on October 3, with our first activity starting at 10am.

Collabora Community Team Building Day – October 3

We have prepared a day of awesome and unique activities for our partners and customers in Berlin.

10:00 – 12:30 – Computer Games Museum

Experience 60 years of gaming history and culture. The Computerspielemuseum contains over 300 exhibits, including rare originals, playable classics, and more!

We will meet at the Computerspielemuseum between 10 and 10.30am for 2 hours of retro gaming fun!

13:00 – Lunch & Indoor Skydiving at Windobona

Ever wanted to skydive? Now’s your chance!

  • An unforgettable experience with guidance from fully-certified instructors.
  • Open to everyone, whether you’re a first-timer or a pro!
  • Reach speeds of up to 180 km/h and imagine how it would feel to jump out of a real plane.
  • Spread your wings inside the 4.3m wide, 17m high, glazed flight chamber.
  • The indoor skydiving centre is located in the centre of the city and is easily accessible by public transport.

If you need to pay for these events yourself, please let us know – and significant others may also be included.

Collabora Partner Day & Hackfest – October 4

On October 4 our wonderful development community has a great opportunity to meet up, catch up, and work on problems together in-person at the bUm thanks to Nextcloud.

Meanwhile – we will have our Partner Day – this will take place at the Alexander Plaza Hotel – located in the centre of the city and is invitation only. Please send an e-mail to book a place before they’re all gone! (More booking info at the end.)

Program of the Business Day

Full details below – subject to change. All times displayed are CEST (UTC+2)

Time Topic Type By
09:30 Welcome to COOL Days Partner Day Opening Naomi Obbard
09:35 Digital Sovereignty: Building a Sustainable Marketing Strategy Strategy Peter Ganten, CEO Univention
10:20 Ensuring Digital Sovereignty with COOL Business Benefits Eloy Crespo
10:40 Ensuring Data Security with COOL Security Miklos Vajna
11:00 Break
11:30 Making Sense of the Last 2 Years: Collabora Online as a Response to the Mega-Trends of the 20’s Keynote Michael Meeks
12:00 Ensuring Covid Resilience with COOL Integration/Features Jan Holesovsky
12:20 Roadmap – Presentation & Discussion Talk/Discussion Michael Meeks
13:00 Lunch
14:00 Executive Round Table including Q&A Panel/Discussion
15:00 Brief Partner updates Feedback Partners
16:00 Wrap-up Close
16:15 Networking until dinner

There will be plenty of opportunity to find out more information on what Collabora is doing and where we are heading. You will also be able to meet the engineers and ask any questions. And of course, we will have snacks, drinks and lunch waiting for you there.

COOL Days “Technical day” – October 5

On October 5 we will have our Technical Day – the event will take place at the bUm.

This day is focused on providing the latest updates about our development, and we will have a whole round of lightning talks from our technical team and community. Come and listen to the latest from our top engineers and contributors about all the most important technical developments and challenges around Collabora Online. We will also have snacks and drinks waiting for you there.

Program of the Technical Day

Full details below – subject to change. All times displayed are CEST (UTC+2)

Time Topic By
10:00 Welcome to COOL Days Technical Day
10:10 (JS)Dialogs Conversion Status Szymon Klos
10:20 NextCloud Office Raul & Julius from NextCloud
10:30 DeepL Mert Tümer
10:40 Faster zstd Tiles Thanks to Facebook Michael Meeks
10:50 Design Improvements Pedro Silva
11:00 Break
11:30 PDF Export Mert Tümer
11:40 Re-vamped Save As Mert Tümer
11:50 Async Saving Cleanups Ash Nakashian
12:00 COOL Kubernetes Pranam Lashkari
12:10 Content Controls Miklos Vajna
12:20 Sparklines and Chart Data Tables Tomaz Vajngerl
12:30 Remote Control Configuration Rashesh Padia
12:40 iOS Improvements Tor Lillqvist
12:50 EGroupware and COOL Integration Birgit Becker
13:00 Lunch
14:00 Streaming Document Deltas Michael Meeks
14:10 Accessibility Checker Tomaz Vajngerl
14:20 Calc Formula Bar Szymon Klos
14:30 Tips on Debugging COOL Andras Timar
14:40 How to Use COOL Inside VNC Lagoon Andrea Wörrlein from VNC
14:50 Video Embedding Ash Nakashian
15:00 COOL and 1&1 Gabriel
15:10 Interoperability Improvements Gülşah Köse
15:20 Multi-host Configuration Jan Holesovsky
15:30 Giant Spreadsheets in Online Luboš Luňák
15:40 Using Cypress for Testing a Presentation Exported in SVG Marco Cecchetti
15:50 COOL Fonts Tor
16:00 File Properties Nick Wingate
16:10 LanguageTool Mert Tümer
16:20 Getting Involved and Overview of COOL Community Pedro Silva
16:30 Close

Get your ticket NOW to reserve your space!

Send an email to as soon as possible to get your name on our VIP list, as there is a limited number of places.

Please do not hesitate to contact us for further information or travel details.

In addition, if you’d like to give a ~five-minute lightning talk, send us an e-mail with Talk: in the subject line so we can arrange a slot for you.

Looking forward to seeing you all there!

Read More

Take advantage of style and grammar checking of your texts in Collabora Online

Writing grammatically correct and stylistically beautiful texts in the browser has now become much more convenient. LanguageTool, known to desktop users of Collabora Office and LibreOffice as a powerful grammar checker extension, is now also available for Collabora Online. In this article you can find out how to use it for your online documents.

About LanguageTool

LanguageTool’s mission is to unleash the professional writing skills in every user. It is an open-source project based on AI-technology that analyses the style, tonality, and typography of text and instantly generates context-aware suggestions. The software supports spell- and grammar checking for 30 languages and is constantly being enhanced by an international team of linguistic professionals and machine learning experts. Besides the plug-ins for desktop office suits, it offers add-ons for all major browsers.


Get LanguageTool


Some Preliminary Comments

Many users of LanguageTool’s browser add-ons may already be familiar with how LanguageTool works. Once installed, it automatically highlights errors in composed online forms and text fields in different colours. However, the documents we edit in Collabora Online are not text in the true sense of the word, as the document never leaves its location on the server. Users only see image renderings of the document during editing. For this reason, a server-side setting must be made to activate LanguageTool. For more information, please consult the technical documentation on LanguageTool. Additionally, a paid premium account with LanguageTool offers better checking results and a larger selection of alternative formulations.

Using LanguageTool in Collabora Online

Through the integration of LanguageTool, different types of errors in text are now highlighted in different colours within Collabora Online. Spelling errors continue being indicated by a red underlining. Grammatical errors are indicated by an orange underline, while stylistic errors are underlined in blue. If you mark the highlighted error, you can display alternative formulations by right-clicking and selecting them through the context menu. LanguageTool’s grammar correction works in all Collabora Online modules, i.e., not only in text documents but also in spreadsheets, presentations, or Draw designs.

Step-by-step Procedure

  1. Write your text in Collabora Online
  2. LanguageTool automatically detects and underlines mistakes in your text
  3. Right-click the underlined segment to open the context menu with LanguageTool suggestions
  4. Choose the prefered suggestion from the context menu

Examples of Grammar- and Style Checking with LanguageTool

Here are just a few examples of style and grammar mistakes that LanguageTool can detect.

  1. Terms spelled with a hyphen
  2. Wrong use of nouns and pronouns
  3. Start of sentences in lower case
  4. Typographical Mistakes (missing or needless commas, typographical ellipsis character, unpaired parentheses)
  5. (Presumably) Incorrect dates and weekday (Weekday and date mismatch, dates in the future)
  6. Successive beginning of sentences with the same word
  7. Stylistic redundancies (e.g., 6 PM in the afternoon)
Unpaired Symbol message from LanguageTool in Collabora Online
Successive beginning of sentences with the same word detected by Language Tool in Collabora Online



Afterword and Thank You

As mentioned above, to make use of this feature, you have to enable this inside Collabora Online’s configuration file. Depending on whether you are using a free or a premium account, both the quality and amount of the suggestions may vary. We would like to express our gratitude to Nicolas Christener and his wonderful team at Adfinis for making this great feature a reality.

Read More