Opening a JAMS File

The JAMS file type is primarily associated with jams.py.

JAMS	File extension: JAMS
	File type:	audio annotation file

What is a JAMS file?

JAMS files mostly belong to jams.py. A JAMS file stores audio annotations in a structured JSON format. It's designed to be a standardized way to represent various types of annotations, making it easier to share and analyze data across different music information retrieval (MIR) research projects and tools. The JAMS format allows for annotations related to beats, chords, segments, pitch contours, and more. Each annotation includes the time of occurrence, the confidence level (if available), and other relevant information depending on the annotation type. This structured approach facilitates consistent data handling and enables interoperability between different MIR systems.

How to open JAMS files

You need a suitable software like jams.py to open a JAMS file. You need a suitable software like jams.py to open a JAMS file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your JAMS file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a JAMS file directly in the browser:. Just drag the file onto this browser window and drop it.

Online JAMS Text Viewer

Choose your .jams file to view

or drag and drop it here

Online File Viewer

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How to extract texts from JAMS files or capture a screenshot to PDF, JPG, DOCX, TXT, ...

If you want to extract texts from JAMS file or capture a screenshot, you can use our free Online JAMS File Viewer:

To do so, click the "Choose your .jams file to view" button above.
Your JAMS file will then be displayed in the browser.
Now click on "Save as..." at the top of the page.
Then choose the file format (e.g. JPG, PDF, DOCX, TXT, ...) you want.
Your file will be converted and downloaded.

.JAMS File Not Opening? How to Fix It:

Because .JAMS files can come from different programs, they aren't universally openable.

Identify the Source: If received from a music researcher or audio developer, it is likely a JSON Annotated Music Specification file used for audio annotation.
Check the Header: Open the file in a basic text editor.
- Seeing { or "annotations": means it's a readable JSON text file.
- Seeing "PK" or scrambled characters suggests a compressed or binary format.
Use the Original Software: You often need the original tool to use it properly. For .JAMS, this is usually the Python library jams.py or a standard code editor. If unsure, ask the sender.
Use this Webpage: Drag and drop your file onto this page to detect its format, extract readable text/metadata, and preview when possible.

Technical Data for JAMS File Extension

File classification:

audio annotation

Related files:

jam, ann, annot, vap

a jams audio annotation file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with JAMS files

Associate the JAMS file extension with the correct application.
Update your software that should actually open audio annotation files. Because only the current version supports the latest JAMS file format. Search, therefore, e.g. on the manufacturer website after an available jams.py update.
To make sure that your JAMS file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .JAMS file online - secure, fast, and no downloads needed.