Developers Day: September 30th

COOL Days 2021 starts very soon with a Developers Day. Meet other developers at this event. It is free to join, virtual this year, and we expect the very first of many COOL Days to come! Reserve your seat by filling the form.

Developers Day features more than 40 sessions with included breaks for Q&A. All talks will be short, from 5 to 15 minutes, this in turn will allow you to watch more cool stuff and perhaps participate in Q&A slots! The full schedule will be released soon, but here is a test.

Starting off with the opening keynote at 09:30 CEST then a couple of talks ranging from insight on Localization of Collabora website; walk-through the Notebookbar structure; Updates on newly FreeBSD port; HowTo session on the Cypress tests and ending the morning session with Canvas for rendering UI.

Q&A ( max 15 min) followed by lunch break (1 hour), during the conference you will have multiple opportunities to participate during these Q&A time slots.

In the afternoon session, attendees will receive an update on the latest Calc canvas improvements followed by a presentation on Performance wins; Editing simulation; Android and iOS new features; Scaling improvements and Dialog improvements.

Q&A break (max 15 min)

See some of the Mobile design improvements; Get to know the ins and outs of bisecting; Collabora Online forum update; Learn how to get involved with translation; Stability and cleanup improvements; How 1&1 embeds COOL and right before the break Kubernetes setup & deployment.

Q&A break (max 15 min)

At 20:00 attendees will hear about all of the effort on the New sidebar and dialog backend. The proceeding talks will touch a variety of challenges and improvements: Async-save design; VBA macro support; OOXML document analysis; Rendering wasteage; Document searching; Multi-page PDF viewing; Text/JSON protocol performance improvement; Fuzzing / asan / string-vectors; User sentiment reporting; Setting up your own Collabora Online; SDK: creating a new integration.

Q&A break (max 15 min)

The last Collabora Online related talks centers on integration pieces and the latest development on that front. From the New Nextcloud/richdocuments pieces and New ownCloud integration pieces to the Moodle integration or the New Mattermost integration ending with a talk on how to contribute and the closing session.

The event as a whole is a great opportunity for people who are familiar with Open Source and Collabora Online. People who just want to learn more about the technology free of cost also have a great opportunity to experience the openness of COOL and the event itself.

Join us to celebrate the 1st COOL day on September the 30th, it’s free of charge:

Reserve your seat


If you have more of a business interest in deploying Collabora Online in the enterprise
then perhaps you should attend the Business Day? Early booking: 50% off before September 18!

Collaboran talks at the LibreOffice Conference 2021

An online conference all about LibreOffice technology

Hosted by The Document Foundation, the LibreOffice Conference 2021 (LibOCon) will be an online event. The live-streaming of the talks and workshops will be taking place from September 23rd to September 25th. Collabora developers will give interesting talks on LibreOffice technology, Collabora Online and the ecosystem on all three days, providing profound insights around the latest features and developments. This article gives you an overview of our presentations. Meet us at LibOCon 2021 and just one week later at our COOLdays!

Day 1: Thursday, September 23rd 2021

Michael Meeks

 13:00 – 13:30 – Room 1

Collabora Keynote

Michael Meeks, Managing Director of Collabora Productivity and member of the LibreOffice Board, looks at the latest developments around LibreOffice from an organizational and ecosystem perspective.

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Noel Grandin

 15:00 – 15:30 – Room 1

I feel the need… The need for speed…

Optimization is a lengthy process. But also an adventure that requires a bit of detective instinct and plenty of exploratory talent. Discover which adjustments are being made to make LibreOffice even faster and better performing.

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Marco Cecchetti

 16:00 – 16:20 – Room 1

Some improvements for the SVG export filter

Marco Cecchetti reports on progress around the use of SVG in presentations and the improvements in performance and storage requirements on export.

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Tomaž Vajngerl

 16:30 – 17:00 – Room 1

Improved document searching with LibreOffice

Collabora developer Miklos Vajna introduces the latest enhancements to LibreOffice and Collabora Online search that visualize hits across different documents.

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Mike Kaganski

 17:00 – 17:30 – Room 1

Multi-column support in LibreOffice 7.2

The new feature, its relevance, obstacles and implementation status. Mike Kaganski shares his experience, how interesting was it to work on this.

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Day 2: Friday, September 24th 2021

Cor Nouws

 12:00 – 12:30 – Room 1

A year of COOL …

Find out about the improvements that LibreOffice technology in the browser experienced. Hear about success stories and new features in Collabora Online!

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Michael Meeks

 12:30 – 13:00 – Room 1

COOL performance

Recently, we have been focusing our Collobora Online development on improving the feel and slickness of document editing. Come and hear about the things that we’ve found and fixed, both in COOL and also in the LibreOffice core to improve the experience!

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Sarper Akdemir

 13:00 – 13:05 – Room 2

PPTX footer export & import interoperability

Sarper Akdemir outlines the challenges around the export & import of Footers in PPTX and how they have been mastered.

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Miklos Vajna

 13:30 – 13:50 – Room 1

Gutter margin in Writer page styles

LibreOffice was already capable of handling various margins in Writer page styles. A missing piece was the support for the gutter margins. Find out, how this was implemented!

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Tomaž Vajngerl

 14:00 – 14:30 – Room 1

Built-in “Xray” like UNO object inspector

When developing macros and extensions in LibreOffice, it is very useful to have an object inspector. The Document Foundation put up a tender to create a built-in Xray-like UNO object inspector. It was awarded to Collabora, and we are now in the process of implementing it. Hear about the progress!

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Tomaž Vajngerl

 15:30 – 16:00 – Room 1

PDF annotations support

The LibreOffice technology in Draw is key to PDF annotations, and the support of a recently added review-based workflow. Find out, how this has been implemented!

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Day 3: Saturday, September 25th 2021

Szymon Kłos

 13:00 – 13:15 – Room 1

JSDialogs improvements over the past year

JSDialogs is a LibreOffice component used to share UI elements with Collabora Online. Hear about the most recent updates added.

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More interesting talks on LibreOffice technology at the COOLdays


We’re excited to announce the COOL Days 2021 – just one week after the LibOCon. The online conference will take place on September 30th and October 1st and feature a vast range of topics around Collabora Online’s technological and commercial development. The 30th of September – Development Day – is focused on developers to share their experiences. The 1st of October – Business Day – concentrates on commercial topics. Discover the COOL Days program.