About Fourier Tools
Fourier Tools is a BISMUTH project by Bodhin Industries. We build free, browser-based tools for learning and using Fourier analysis and digital signal processing. Our interactive visualizers, calculators, and demos are designed from the ground up for the web — no downloads, no plug-ins, no accounts.
Our mission: make signal processing concepts accessible and interactive for students, educators, and engineers worldwide. Whether you're encountering the DFT for the first time or designing production filters, our tools meet you where you are.
All tools run entirely in your browser. No data is uploaded to any server. Your signals, drawings, and configurations never leave your device.
Questions or feedback? Reach us at help@fouriertools.com.
Terms of Service
1. Acceptance of Terms
By accessing or using fourier.tools (the "Service"), you agree to be bound by these Terms of Service. If you do not agree, please do not use the Service.
2. Service Description
Fourier Tools provides free, browser-based educational tools for signal processing, Fourier analysis, and related topics. The Service is provided on an "as available" basis. We make no guarantee of uptime, accuracy, or fitness for any particular purpose.
3. Use License
You may use the tools freely for personal, educational, and commercial purposes. You may embed tools on your own website using the embed codes we provide. This license does not grant you ownership of any intellectual property belonging to Fourier Tools.
4. Disclaimer of Warranties
The tools and content are provided "as is" without warranty of any kind, express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, and non-infringement. Results are for educational purposes only and are not a substitute for professional engineering analysis, validation, or certification.
5. Intellectual Property
The site content, design, code, and branding are the property of Bodhin Industries (operating as Fourier Tools, a BISMUTH project) and are protected by applicable intellectual property laws. User-generated content — such as drawn shapes, uploaded signals, and custom configurations — remains yours.
6. Acceptable Use
You agree not to:
- Attempt to reverse-engineer, decompile, or disassemble the Service.
- Overload, disrupt, or interfere with the Service or its infrastructure.
- Use the Service for any illegal or unauthorized purpose.
- Scrape or harvest content in bulk without permission.
7. Advertising
The Service displays third-party advertisements to remain free for all users. We do not control or endorse the content of these advertisements. Your interactions with advertisers are solely between you and the advertiser.
8. Changes to Terms
We reserve the right to update or modify these Terms of Service at any time. Changes will be posted on this page. Your continued use of the Service after changes are posted constitutes acceptance of the revised terms.
9. Contact
For questions about these terms, contact us at help@fouriertools.com.
Privacy Policy
1. Data Collection
We do not collect personal data. All computation happens locally in your browser. We do not require accounts, email addresses, or any personal information to use any tool on this site.
2. Cookies
Third-party advertising partners (such as Adsterra) may set cookies in your browser. We do not use any first-party tracking cookies. You can manage cookie preferences through your browser settings.
3. Analytics
We may use privacy-respecting analytics to understand traffic patterns and improve the Service. No personally identifiable information is collected through our analytics.
4. Advertising
Advertisements are served by third-party ad networks. These networks may use cookies, web beacons, and similar tracking technologies to serve ads based on your browsing activity. Please refer to each network's respective privacy policy for details on their data practices.
5. Email Communications
If you contact us voluntarily at help@fouriertools.com, we store your email address solely to respond to your inquiry. If we reach out to you, you can unsubscribe at any time via our /unsubscribe page or by replying "unsubscribe". We never sell or share email addresses with third parties.
6. Children
Our tools are educational and suitable for all ages. We do not knowingly collect personal data from anyone, including children under the age of 13.
7. Third-Party Links
The Service may contain links to external websites and resources. We are not responsible for the content or privacy practices of those third-party sites. We encourage you to review their privacy policies before providing any personal information.
8. Data Security
Since we do not collect or store personal data, there is minimal risk of a data breach. Your signals, drawings, and configurations are processed entirely on your device and never leave your browser.
9. Changes to This Policy
We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated revision date. Please check back periodically for the latest version.
Anti-Spam Commitment
We take unsolicited email seriously. Here is our commitment to you:
- ✓ We only email educators and professionals who may benefit from our free tools.
- ✓ Every email includes a one-click unsubscribe link.
- ✓ We honor all unsubscribe requests within 24 hours.
- ✓ We never sell, share, or rent email addresses to anyone.
- ✓ If you didn't request an email from us, we apologize — use the unsubscribe link and you'll never hear from us again.
- ✓ We are fully CAN-SPAM and GDPR compliant.
Get in Touch
Have questions, suggestions, or feedback? We'd love to hear from you.
help@fouriertools.comLast updated: February 2026