A simple tool to help you manually discover the depths of your spectra one spectrum at a time. It can load MGF files (only in centroid mode, also do not forget to deconvolute if you have TD data). Once loaded you can select a scan and add you annotation while tweaking the exact settings for generating the annotation. The annotation itself is interactive to help you discover what the spectrum means. Which you can then export as nice images for use in other environments.
What's new in 1.2.1
Fixed custom modifications and custom models not being displayed
Fixed print output including unnecessary parts
Updated naming of "folder" button to better reflect it use for Bruker .d data
Better error output + merged identical errors
Added generalised display of flanking residues for identified peptidoforms
Improved support for MaxNovo de novo sequences
Added support for π-HelixNovo, π-PrimeNovo, Proteoscape, and Casanovo v5.0
Yes. Annotator is free and open-source software released under the MIT license.
What is the latest version of Annotator?
The latest version is 1.2.1, released on Sep 1, 2025.
Is it safe to download Annotator?
The download button links to the official installer published on github.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with 8e33ece379158db40133992a0bf176b67f1c802edba409dd28fce687d2c88452.
Which Windows versions does Annotator support?
Annotator runs on Windows and is available for 64-bit (x64) systems.
How do I install Annotator silently?
Run the offline installer with "Annotator_1.2.1_x64-setup.exe" /S, or install it with Windows Package Manager: winget install --id=Snijderlab.Annotator -e --silent.
How do I uninstall Annotator?
Open Settings › Apps › Installed apps, find Annotator and select Uninstall. From the command line, run winget uninstall --id=Snijderlab.Annotator -e.
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