Igor Filter Design Laboratory is included with Igor 8

The full version of IFDL 4 has been built into Igor 8.

Adding IFDL to Earlier Versions of Igor

IFDL can be added to earlier versions of Igor by purchasing IFDL separately. Contact [email protected] to purchase this additional software.


The IFDL Demo is version 3.1, which allows you to design your own Kaiser Low Pass filters and other Window Filters, and apply them to your data. It does not include IIR filter designs.

You can compare the responses of two filters, save the filter coefficients for use in other programs, and print a report showing a filter's response and coefficient values.

Pre-computed examples of McClellan-Parks-Rabiner (MPR) filters and Kaiser Maximal Flatness filters are provided.

The demo version ignores changes to the design parameters for these filter types.

Download the IFDL 3.1 Trial Version for Macintosh

For Igor 7 or earlier.

Download the IFDL 3.1 Trial Version for Windows

For Igor 7 or earlier.

IFDL 4 Upgrade

The IFDL 4 Upgrade is a free download for all registered users of any previous version of IFDL.

Please contact us at [email protected] or by phone at (503) 620-3001 to order IFDL 4 or the IFDL 4 Upgrade.

The upgrade includes a PDF version of the entire IFDL 4 Manual, which you can also download here.

    Download Igor 4.02 Manual

    For Igor 7 or earlier.

    IFDL 4.02 Updates - September 12, 2011

    These files have been updated since IFDL 4 first shipped:

    • IFDL.pdf
    • IFDL.ipf
    • IIR Analog Design.ipf
    • MPR Differentiator.ipf
    • Window Filters.ipf

    Download IFDL 4.02 replacement files

    For Igor 7 or earlier.




    Igor Pro 8

    Learn More

    Igor XOP Toolkit

    Learn More

    Igor NIDAQ Tools MX

    Learn More