Open VHDR files in your browser
The EEG BrainVision Recorder writes, and MNE, EEGLAB and BIDS datasets keep. Open one right here, every channel on one timeline with its markers, with no Analyzer. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your EEG opens with each channel as a curve on one timeline, its markers along the top.
- Every channel in its unit • Its reference by its name
- Stimuli, responses and segments along the top • Find one by its text
- Two cursors • The time between them, and each channel's lowest, highest, mean and RMS
- Export • PNG, the samples as CSV and the markers as CSV
About VHDR
Brain Products' BrainVision Recorder writes its EEG as three files, and the format is one of those BIDS takes for EEG, so MNE-Python, EEGLAB and FieldTrip write it too.
The header (.vhdr) is text in sections: the data and marker files' names, the number of channels, the sampling interval in microseconds and each channel's name, reference, resolution and unit. The data (.eeg) holds the samples as 16 or 32 bit integers or floats, multiplexed or a channel at a time, and the markers (.vmrk) list each stimulus, response and segment at its data point.
Filepeek reads them in your browser when they're dropped together and draws every channel as a curve in its unit on one timeline, the markers along the top, stimuli and responses in colors of their own, and when it began from the first New Segment. Drag or pinch to move and zoom, put two cursors for the time between them and each channel's lowest, highest, mean and RMS, find a marker by its text, and save the view as PNG, the samples between the cursors as CSV, or the markers as CSV.
BrainVision header
.vhdr
Format
- MIME type
- text/x-brainvision
- Made by
- Brain Products
Inside the file
- Header
- The files, the channels and the sampling interval
- Channels
- Name, reference, resolution and unit
- Data
- Integers or floats, in the .eeg
- Markers
- Stimuli, responses and segments, in the .vmrk
Opens in every browser
Filepeek opens BrainVision files in Chrome, Edge, Firefox and Safari when the .vhdr comes with its .eeg and .vmrk. On their own, browsers show the header as text or download the files.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Apps that open VHDR
- WindowsBrainVision Analyzer, paid, or MNE-Python, free
- MacMNE-Python, free
- iPhone and iPadNo app opens it
- AndroidNo app opens it
Questions
How do I open BrainVision files without Analyzer?
Drop the .vhdr, .eeg and .vmrk together on this page, or choose them together with Peek a VHDR. Every channel opens on one timeline in your browser with its markers.
Do I need the .eeg file?
Yes, for the channels. A .vhdr opened alone says its samples are in files that aren't with it, so open the three together.
Does it open BIDS datasets?
Yes, a recording at a time. Drop the .vhdr from a BIDS eeg folder with its .eeg and .vmrk, and it opens like any other.
Can I save the markers?
Yes. Choose Export, then Save the marks, for a CSV of each marker's time, length and text.