Free
Free
FFTW homepage describes the library as free software with downloads from the official site.
- Access
- FFTW homepage describes the library as free software with downloads from the official site.
FFTW
● Identity checkedCode · Vendor site 2026-10-04
FFTW is a free C library for computing discrete Fourier transforms in one or more dimensions on arbitrary input sizes, including real, complex, and DCT/DST variants. It targets high-performance FFT routines with official releases and documentation maintained on fftw.org.
- Category
- Code
- Free access
- FFTW homepage describes the library as free software with downloads from the official site.
- API access
- Not confirmed
Is FFTW right for you?
A good fit for
Scientific and engineering developers needing fast FFT implementations in C/C++ projects.
Before you choose
You compile and link FFTW locally; support is community and documentation driven rather than a hosted SaaS.
Fast Fourier transforms in C
FFTW presents itself as the FFT library of choice for most applications with free downloads and extensive documentation.
What it can do
Features & capabilities
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| FFT scope | Introduction states FFTW computes DFTs in one or more dimensions for real and complex data. | Facts sourced | 2026-10-04 |
| Current release | Homepage highlights latest official release 3.3.11 available from the download page. | Facts sourced | 2026-10-04 |
Understand the total cost
FFTW pricing & plans
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Explore toolThe practical questions
Frequently asked questions
What is FFTW used for?
FFTW is a free C library for computing discrete Fourier transforms in one or more dimensions on arbitrary input sizes, including real, complex, and DCT/DST variants. It targets high-performance FFT routines with official releases and documentation maintained on fftw.org.
Does FFTW have a free plan?
FFTW homepage describes the library as free software with downloads from the official site.. This record lists ongoing free access; check the plan limits before starting.
How much does FFTW cost?
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Can I use FFTW through an API?
Not confirmed. API access and subscription access may have different terms; consult the linked sources.
What should I check before choosing it?
You compile and link FFTW locally; support is community and documentation driven rather than a hosted SaaS.
Price history
No retained pricing changes yet. A current price alone does not establish a historical trend.
How this profile is supported
Identity and profile
Reviewed vendor source
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.