Website review fftw.org
FFTW Home Page
Generated on March 06 2026 17:28 PM
Old data? UPDATE !
The score is 49/100
SEO Content
Title
FFTW Home Page
Length : 14
Perfect, your title contains between 10 and 70 characters.
Description
A fast, free C FFT library; includes real-complex, multidimensional, and parallel transforms. Benchmarked against many other FFTs.
Length : 130
Great, your meta description contains between 70 and 160 characters.
Keywords
FFT,DFT,benchmark,parallel FFT,source code,math library,Fast Fourier Transform,DSP,Signal Processing
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Og Meta Properties
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Headings
| H1 | H2 | H3 | H4 | H5 | H6 |
| 0 | 9 | 0 | 0 | 0 | 0 |
- [H2] Introduction
- [H2] Features
- [H2] Documentation
- [H2] Downloading
- [H2] Literature.
- [H2] Awards
- [H2] Acknowledgements
- [H2] Related Links
- [H2] Feedback
Images
We found 4 images on this web page.
1 alt attributes are empty or missing. Add alternative text so that search engines can better understand the content of your images.
Text/HTML Ratio
Ratio : 59%
Ideal! This page's ratio of text to HTML code is between 25 and 70 percent.
Flash
Perfect, no Flash content has been detected on this page.
Iframe
Great, there are no Iframes detected on this page.
SEO Links
URL Rewrite
Good. Your links looks friendly!
Underscores in the URLs
We have detected underscores in your URLs. You should rather use hyphens to optimize your SEO.
In-page links
We found a total of 54 links including 17 link(s) to files
| Anchor | Type | Juice |
|---|---|---|
| Download | Internal | Passing Juice |
| GitHub | External | Passing Juice |
| Mailing List | External | Passing Juice |
| Benchmark | Internal | Passing Juice |
| Features | Internal | Passing Juice |
| Documentation | Internal | Passing Juice |
| FAQ | Internal | Passing Juice |
| Links | Internal | Passing Juice |
| Feedback | Internal | Passing Juice |
| free software | Internal | Passing Juice |
| FFT | External | Passing Juice |
| release notes | Internal | Passing Juice |
| Matteo Frigo | Internal | Passing Juice |
| Steven G. Johnson | External | Passing Juice |
| fftw-announce mailing list | External | Passing Juice |
| fftw-announce mailing list | Internal | Passing Juice |
| discrete cosine transform | External | Passing Juice |
| discrete sine transform | External | Passing Juice |
| Parallel transforms | Internal | Passing Juice |
| threads | External | Passing Juice |
| OpenMP | External | Passing Juice |
| Documentation | Internal | Passing Juice |
| Free | External | Passing Juice |
| FFTW license | Internal | Passing Juice |
| purchased from MIT | External | Passing Juice |
| FAQ | Internal | Passing Juice |
| manual | Internal | Passing Juice |
| Internal | Passing Juice | |
| fftw-wisdom | Internal | Passing Juice |
| fftw-wisdom-to-conf | Internal | Passing Juice |
| discussion of pruned FFTs | Internal | Passing Juice |
| interview of the FFTW authors | External | Passing Juice |
| BibTeX file | Internal | Passing Juice |
| The Design and Implementation of FFTW3 | Internal | Passing Juice |
| Postscript | Internal | Passing Juice |
| here | External | Passing Juice |
| Implementing FFTs in Practice | External | Passing Juice |
| "A Fast Fourier Transform Compiler," | Internal | Passing Juice |
| PLDI '99 | External | Passing Juice |
| Postscript | Internal | Passing Juice |
| slides | Internal | Passing Juice |
| "FFTW: An Adaptive Software Architecture for the FFT" | Internal | Passing Juice |
| Postscript | Internal | Passing Juice |
| "The Fastest Fourier Transform in the West," | Internal | Passing Juice |
| "Cache-Oblivious Algorithms," | Internal | Passing Juice |
| slides | Internal | Passing Juice |
| slides | Internal | Passing Juice |
| James Van Buskirk | External | Passing Juice |
| A modified split-radix FFT with fewer arithmetic operations | Internal | Passing Juice |
| Type-II/III DCT/DST algorithms with reduced number of arithmetic operations | External | Passing Juice |
| Type-IV DCT, DST, and MDCT algorithms with reduced numbers of arithmetic operations | External | Passing Juice |
| 1999 J. H. Wilkinson Prize for Numerical Software | External | Passing Juice |
| Acknowledgements | Internal | Passing Juice |
| our public keys | Internal | Passing Juice |
SEO Keywords
Keywords Cloud
transform from fourier frigo fft fftw software transforms version also
Keywords Consistency
| Keyword | Content | Title | Keywords | Description | Headings |
|---|---|---|---|---|---|
| fftw | 31 |  |
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| transforms | 13 | |
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| transform | 11 | |
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| also | 10 | |
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| fourier | 9 | |
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Usability
Url
Domain : fftw.org
Length : 8
Favicon
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Printability
We could not find a Print-Friendly CSS.
Language
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Dublin Core
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Document
Doctype
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Encoding
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W3C Validity
Errors : 0
Warnings : 0
Email Privacy
Warning! At least one email address has been found in the plain text. Use free antispam protector to hide email from spammers.
Deprecated HTML
| Deprecated tags | Occurrences |
|---|---|
| <CENTER> | 1 |
Deprecated HTML tags are HTML tags that are no longer used. It is recommended that you remove or replace these HTML tags because they are now obsolete.
Speed Tips
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Excellent, your website doesn't use nested tables. |
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Perfect. No inline css has been found in HTML tags! |
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Great, your website has few CSS files. |
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Perfect, your website has few JavaScript files. |
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Perfect, your website takes advantage of gzip. |
Mobile
Mobile Optimization
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Apple Icon |
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Meta Viewport Tag |
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Flash content |
Optimization
XML Sitemap
Missing
Your website does not have an XML sitemap - this can be problematic.
A sitemap lists URLs that are available for crawling and can include additional information like your site's latest updates, frequency of changes and importance of the URLs. This allows search engines to crawl the site more intelligently.
Robots.txt
https://fftw.org/robots.txt
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Analytics
Missing
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PageSpeed Insights
Device
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