Convert EDF to NWB Online - Free & Fast

What is EDF?

European Data Format (EDF) is a simple and widely-used standard for exchanging and storing medical time-series data, commonly used for EEG, EMG, ECG, and polysomnography recordings in clinical and research settings.

What is NWB?

Neurodata Without Borders (NWB) is a data standard built on HDF5 for organizing and sharing neuroscience experiments, consolidating electrophysiology, optical physiology, behavior, and metadata into a single self-describing file.

When Should You Use EDF vs NWB?

EDF vs NWB: Key Differences

• •EDF and NWB diverge on compression: lossless compression for the source, lossless compression for the target.
• •Both formats share lossless compression, so quality behavior is similar across the two — file size differences come from algorithm efficiency rather than compression philosophy.
• •Alpha channel support: NWB lacks transparency support.
• •Storage footprint: 1MB to 100MB per recording depending on channels and duration for EDF vs 100MB to 2TB per experiment depending on modalities for NWB.
• •EDF is optimized for sleep studies, eeg recording, clinical neurophysiology while NWB is designed for extracellular electrophysiology, optical physiology, multi-modal neuroscience — choose based on your specific workflow needs

Advantages of EDF

• ✓At its core, EDF relies on lossless encoding — a design choice that makes it perfect for Sleep studies, EEG recording, clinical neurophysiology.
• ✓You won't run into compatibility issues with EDF — it's a universal standard across platforms.
• ✓File size management with EDF: larger files guaranteed to match the original exactly.
• ✓Every major application in the Sleep studies, EEG recording, clinical neurophysiology space supports EDF natively.

Advantages of NWB

• ✓At its core, NWB relies on lossless encoding — a design choice that makes it perfect for Extracellular electrophysiology, optical physiology, multi-modal neuroscience.
• ✓You won't run into compatibility issues with NWB — it's a universal standard across platforms.
• ✓File size management with NWB: larger files guaranteed to match the original exactly.
• ✓Every major application in the Extracellular electrophysiology, optical physiology, multi-modal neuroscience space supports NWB natively.

Common Use Cases for EDF to NWB Conversion

Industry Applications

Best Practices for EDF to NWB Conversion

• →When converting EDF to NWB: verify that variable names, units, and dimensions are preserved
• →Preserve metadata and provenance attributes so NWB remains scientifically interpretable
• →Check that multi-dimensional arrays (time, depth, lat, lon) map without truncation
• →Confirm endianness and numeric precision are handled correctly for the target format output
• →Always keep a backup of your original files before converting
• →Choose the appropriate quality settings for your specific use case

Troubleshooting EDF to NWB Conversion

• !Coordinate variable ordering is wrong in the converted NWB → CF conventions expect (time, depth, lat, lon) ordering
• !Missing values / fill values are not recognized by tools reading NWB → check that the fill value attribute transferred correctly
• !The converted NWB file has incorrect data type → data precision (float32 vs float64) should match the original's requirements
• !Dimension scales are off in the converted NWB → verify that scale_factor and add_offset were preserved during conversion

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