The blog
Tutorials, new features, and stories from the labs using WEBKNOSSOS to explore, annotate, and share large 3D microscopy data.


TUTORIAL
Making a flythrough video of your data with WEBKNOSSOS and your AI coding agent
Making a flythrough video of your data with WEBKNOSSOS and your AI coding agent
With your data in WEBKNOSSOS, you can create beautiful, professional-looking videos, which has become much easier now that we have AI coding agents (e.g. Claude).
Sep 2026
Sep 2026
Sep 2026

FEATURE
Maximum Intensity Projection now in WEBKNOSSOS
Maximum Intensity Projection now in WEBKNOSSOS
Maximum Intensity Projection (MIP) renders your dataset directly in the 3D viewport. It is similar to meshes, giving you a spatial view of your data, but it applies to any image layer rather than only segmentations, and it needs no precomputation.
Aug 2026
Aug 2026
Aug 2026

INTERVIEW
Teaching Cell Biology with Real EM Data: An Interview with Ahmed Elewa, Miami University
Teaching Cell Biology with Real EM Data: An Interview with Ahmed Elewa, Miami University
WEBKNOSSOS allows researchers and students to explore large 3D microscopy datasets directly in the browser. We spoke with Ahmed Elewa, assistant professor at Miami University, about how he used WEBKNOSSOS to teach cell biology through a hands-on course project.
May 2026
May 2026
May 2026

CASE STUDY
From Beamline to Browser: Automating High-Throughput X-ray Imaging with WEBKNOSSOS at EMBL P14
From Beamline to Browser: Automating High-Throughput X-ray Imaging with WEBKNOSSOS at EMBL P14
At the European Molecular Biology Laboratory (EMBL) in Hamburg, an X-ray imaging team has established a fully automated pipeline that transfers reconstructed synchrotron X-ray tomography datasets directly into a browser-based 3D environment powered by WEBKNOSSOS.
Mar 2026
Mar 2026
Mar 2026

CASE STUDY
Custom model training for mitochondria detection in WEBKNOSSOS
Custom model training for mitochondria detection in WEBKNOSSOS
We tested the AI features of WEBKNOSSOS on a real-world volume EM dataset of Mouse Cortex. We trained a custom instance segmentation model and deployed it across the full 140GB volume.
Feb 2026
Feb 2026
Feb 2026

EXERCISES
Cell biology exercises with WEBKNOSSOS
Cell biology exercises with WEBKNOSSOS
With these exercises, students will explore the brain in 3D at high resolution, identify cell processes, and learn to recognize synapses.
Oct 2024
Oct 2024
Oct 2024

EXERCISES
Neuroanatomy exercises with WEBKNOSSOS
Neuroanatomy exercises with WEBKNOSSOS
These exercises, designed by Prof. Berson. from Brown University, will help your students get familiar with connectomic analysis of retinal neurons.
Sep 2024
Sep 2024
Sep 2024

FEATURE
AI Quick-Select Tool
AI Quick-Select Tool
The quick-select tool now works in 3D and can predict up to 16 sections! Moreover, a simple click now suffices to segment a cell - no need to draw a rectangle.
Sep 2024
Sep 2024
Sep 2024

STORY
Printing neurons in 3D from WEBKNOSSOS
Printing neurons in 3D from WEBKNOSSOS
For the Connectomics conference, we wanted to create neuron sculptures to showcase the beauty and complexity of the brain through art. As many of you know, the shape and architecture of neurons are extremely challenging to reproduce.
Jul 2024
Jul 2024
Jul 2024

INTERVIEW
Pioneering Accessibility in Retinal Connectomics
Pioneering Accessibility in Retinal Connectomics
In this interview with Prof. David Berson from Brown University, you will learn about his pioneering research on the retina, how EM-based connectomics has influenced his work, and get insights into his latest project.
May 2024
May 2024
May 2024

VIDEO
A story about collaboration, continents, and the struggles of big data
A story about collaboration, continents, and the struggles of big data
Embark on a journey with two scientists in London as they navigate the challenges of managing large datasets from a serial electron microscope.
Apr 2024
Apr 2024
Apr 2024

INTERVIEW
Behind the scenes of WEBKNOSSOS
Behind the scenes of WEBKNOSSOS
Philipp Otto has been one of the principal developers of WEBKNOSSOS for a decade. In this interview, he will share his story and insights from behind the scenes of developing such a product, including the challenges and the enjoyment it brings.
Feb 2024
Feb 2024
Feb 2024

FEATURE
Feature highlights of WEBKNOSSOS from 2023
Feature highlights of WEBKNOSSOS from 2023
2023 was a year full of new features for WEBKNOSSOS, with exciting additions: from AI-powered quick-select tools to improved touch device support, here are the standout features we want to make sure you haven’t missed!
Jan 2024
Jan 2024
Jan 2024

FEATURE
Creating animations with WEBKNOSSOS
Creating animations with WEBKNOSSOS
We are excited to introduce a new feature in WEBKNOSSOS for creating professional-looking animations of your data.
Dec 2023
Dec 2023
Dec 2023

FEATURE
Segment Statistics in WEBKNOSSOS
Segment Statistics in WEBKNOSSOS
You can now access segment statistics in WEBKNOSSOS! The segments statistics include essential information like cell count, the volume of the segments, their positions, as well as their bounding boxes.
Oct 2023
Oct 2023
Oct 2023

FEATURE
Introducing 4D datasets for time series in WEBKNOSSOS
Introducing 4D datasets for time series in WEBKNOSSOS
WEBKNOSSOS added support for time series datasets, opening up a new dimension in your data exploration. Now, you can not only view your data in 3D but also in 4D, adding the element of time.
Sep 2023
Sep 2023
Sep 2023

TUTORIAL
Showing and annotating data with an iPad
Showing and annotating data with an iPad
Using WEBKNOSSOS on an iPad offers two key advantages: seamless data visualization on the go and intuitive annotation with the Apple Pencil. Discover in this tutorial how to show and annotate your data with an iPad.
Aug 2023
Aug 2023
Aug 2023

TUTORIAL
Pen Tablets and WEBKNOSSOS
Pen Tablets and WEBKNOSSOS
In this tutorial, we share helpful tips on using pen tablets for efficient data annotation with WEBKNOSSOS. You will learn to program your tablet and pen buttons to match the WEBKNOSSOS shortcuts and we will show you a complete annotation workflow.
Jul 2023
Jul 2023
Jul 2023

INTERVIEW
Comparative Connectomic Studies among Species
Comparative Connectomic Studies among Species
Sahil Loomba is a post-doctoral research scientist at the Max Planck Institute for Brain Research. In this interview, he will discuss the research’s origins, the encountered challenges, the tools and techniques employed, and his perspective on the future development of comparative connectomics across not only species, but also ages and disease models.
Jul 2023
Jul 2023
Jul 2023

FEATURE
New AI-based quick segment tool in WEBKNOSSOS
New AI-based quick segment tool in WEBKNOSSOS
We are excited to announce the integration of Meta’s new AI model, SAM: Segment Anything, into WEBKNOSSOS! Learn how to make the best out of the AI option in WEBKNOSSOS.
Jun 2023
Jun 2023
Jun 2023

TUTORIAL
Automation and interoperability
Automation and interoperability
In this tutorial, we will learn how to download data as a Tiff stack with the WEBKNOSSOS UI, how to automate this process, and how to incorporate an N5 remote dataset into WEBKNOSSOS.
Jun 2023
Jun 2023
Jun 2023

TUTORIAL
Volume annotations with WEBKNOSSOS
Volume annotations with WEBKNOSSOS
In this tutorial, we will explore the annotation features of WEBKNOSSOS. We will cover everything from opening and annotating a published dataset to utilizing both basic and advanced annotation tools.
May 2023
May 2023
May 2023

TUTORIAL
Data sharing with WEBKNOSSOS
Data sharing with WEBKNOSSOS
In this tutorial, you will discover how to efficiently manage and share your data.
Apr 2023
Apr 2023
Apr 2023

TUTORIAL
Self-hosted data for WEBKNOSSOS
Self-hosted data for WEBKNOSSOS
This tutorial explains how to store data externally by converting data into OME-Zarr and setting up a static file server for use with WEBKNOSSOS.
Feb 2023
Feb 2023
Feb 2023

FEATURE
Organize your data in folders
Organize your data in folders
The folder structure in WEBKNOSSOS allows you to have your datasets structured, organized, and easily accessible.
Feb 2023
Feb 2023
Feb 2023

STORY
Rebranding WEBKNOSSOS
Rebranding WEBKNOSSOS
Follow our journey of redesigning the branding of WEBKNOSSOS to align it more closely with our identity and values.
Feb 2023
Feb 2023
Feb 2023

FEATURE
Feature highlights of WEBKNOSSOS from 2022
Feature highlights of WEBKNOSSOS from 2022
Read all about the top features of 2022: quick-select, interpolation tool, collaborative annotations, and more.
Feb 2023
Feb 2023
Feb 2023

EXPERIMENT
Comparing Array Tomography with Serial Block-face Electron Microscopy
Comparing Array Tomography with Serial Block-face Electron Microscopy
Array tomography and Serial Block-face Electron Microscopy are two microscopy techniques that work in a similar way and are hard to understand. We playfully explained and compared these techniques using a fig (AT) and a tomato (SBEM).
Jan 2023
Jan 2023
Jan 2023

EXPERIMENT
Reconstructing a kiwi fruit… with SBEM (sort of)
Reconstructing a kiwi fruit… with SBEM (sort of)
How would you explain SBEM/volume EM and 3D reconstruction to your grandparents? With a camera, a knife, and a kiwi fruit.
Jan 2023
Jan 2023
Jan 2023

TUTORIAL
Data Streaming with WEBKNOSSOS Libs
Data Streaming with WEBKNOSSOS Libs
Today, we would like to highlight some features and quality of life improvements WEBKNOSSOS acquired over the summer. They will accelerate your workflows and make the annotating of EM data easier.
Nov 2022
Nov 2022
Nov 2022

TUTORIAL
Using Zarr Datasets with WEBKNOSSOS
Using Zarr Datasets with WEBKNOSSOS
This tutorial explains how to load any Zarr-format-based datasets into WEBKNOSSOS. We support reading Zarr dataset from the local file system, cloud providers such as S3 and Google Cloud, as well as through any web server over HTTP.
Oct 2022
Oct 2022
Oct 2022

TUTORIAL
Zarr Streaming from WEBKNOSSOS
Zarr Streaming from WEBKNOSSOS
In this blog post, we will share some progress on streaming any dataset from WEBKNOSSOS to compatible third-party programs through the Zarr interface.
Sep 2022
Sep 2022
Sep 2022

FEATURE
Summer update: annotate faster than ever with these new features
Summer update: annotate faster than ever with these new features
Today, we would like to highlight some features and quality of life improvements WEBKNOSSOS acquired over the summer. They will accelerate your workflows and make the annotating of EM data easier.
Aug 2022
Aug 2022
Aug 2022

INTERVIEW
Interview with Carles Bosch on Correlative Multimodal Imaging
Interview with Carles Bosch on Correlative Multimodal Imaging
Carles Bosch, principal laboratory research scientist at the Sensory Circuits and Neurotechnology Laboratory of the Francis Crick Institute, explains his research on glomerular column circuits in the mouse olfactory bulb.
Jul 2022
Jul 2022
Jul 2022

INTERVIEW
Reconstructing connectomes from human, macaque, and mouse cortex with Voxelytics
Reconstructing connectomes from human, macaque, and mouse cortex with Voxelytics
Daniel Werner, data scientist at scalable minds, tells us about the analysis and reconstruction of 9 vEM datasets he contributed to for a comparative connectomic study among species, by the Max Planck Institute for Brain Research.
Jul 2022
Jul 2022
Jul 2022

FEATURE
How to speed up your annotations using the volume interpolation tool in WEBKNOSSOS
How to speed up your annotations using the volume interpolation tool in WEBKNOSSOS
In this tutorial, we will tell you about the interpolation feature. Draw on one slice, move forward by a few slices, draw again… and WEBKNOSSOS will interpolate the segments between the two annotated slices.
Jun 2022
Jun 2022
Jun 2022

INTERVIEW
How to debug a synapse classifier with WEBKNOSSOS
How to debug a synapse classifier with WEBKNOSSOS
Today, we will have a chat with one of our colleagues: Valentin Pinkau. As an experienced data scientist specializing in connectomics, he has some interesting insights to share.
Oct 2021
Oct 2021
Oct 2021

CASE STUDY
Automated Neuron Reconstruction
Automated Neuron Reconstruction
With the recent publication of the “Dense connectomic reconstruction in layer 4 of the somatosensory cortex“ paper by the Max-Planck-Institute for Brain Research, we showcase WEBKNOSSOS and the ML reconstruction pipeline Voxelytics.
Aug 2021
Aug 2021
Aug 2021

TUTORIAL
Machine learning workflows for large-scale reconstruction projects
Machine learning workflows for large-scale reconstruction projects
Here, we share some tips on how to reconstruct biological objects (e.g. neurons) from tera- or peta-scale image datasets.
Jul 2021
Jul 2021
Jul 2021
Annotate, proofread, and analyze large 3D microscopy datasets in the browser.
Annotate, proofread, and analyze large 3D microscopy datasets in the browser.