Flat Rate Digital LLC · Fairbanks, Alaska
Last updated: June 6, 2026
Agreement: By purchasing, downloading, or using SpreadViewer, you agree to be bound by these Terms. If you do not agree, please do not use the Services.
We are Flat Rate Digital LLC ("Company," "we," "us," "our"). You can contact us at questions@spreadviewer.com. These Terms constitute a legally binding agreement between you and the Company concerning your use of SpreadViewer.
SpreadViewer is a single-file HTML application for laying out books for Amazon KDP (Kindle Direct Publishing) print. Users paste or import manuscript text, select a trim size, and the app paginates content into a spread view. Output is an HTML file the user opens in Chrome or Edge and saves as a PDF for KDP upload.
SpreadViewer requires an internet connection only for font loading and license activation. No account creation is required. We make no representation that SpreadViewer output will be accepted by KDP or will meet all KDP formatting guidelines. Users are solely responsible for verifying their final files against current KDP specifications before uploading.
We are the owner of all intellectual property rights in SpreadViewer, including all source code, design, layout, user interface, and functionality. These materials are protected by applicable copyright and intellectual property laws. You are granted a limited license to use SpreadViewer strictly in accordance with these Terms. No intellectual property rights are transferred to you by virtue of your purchase.
You retain all intellectual property rights in the manuscript text, images, and other content you create or import using SpreadViewer. We do not claim ownership over your content. You are responsible for ensuring you have the rights to use any content you incorporate into your layouts.
Subject to your compliance with these Terms and upon receipt of payment, we grant you a limited, non-exclusive, non-transferable, non-sublicensable license to:
This license does not permit you to:
Each license key is for a single user. Sharing a license key constitutes a material breach of these Terms.
SpreadViewer is available for a one-time purchase of $39.99 USD, processed through LemonSqueezy. By completing a purchase, you agree to LemonSqueezy's Terms of Service and Privacy Policy in addition to these Terms.
Upon successful payment, you will receive a license key by email. You must activate this key within SpreadViewer to unlock full export functionality. License keys are for a single user and remain valid indefinitely for the version purchased.
Due to the digital nature of SpreadViewer, all sales are final. We do not offer refunds once a license key has been delivered and activated.
If you experience a technical issue that prevents SpreadViewer from functioning as described, please contact us at questions@spreadviewer.com before requesting a chargeback. We will make reasonable efforts to resolve any technical issues. Unresolved issues may be eligible for a refund at our sole discretion within 7 days of purchase.
By using SpreadViewer, you represent and warrant that you have the legal capacity to agree to these Terms; you are not a minor in your jurisdiction; you will not use SpreadViewer for any illegal or unauthorized purpose; and you own or have the right to use all content you incorporate into your book layouts.
You agree not to:
SpreadViewer is designed for and tested on Google Chrome and Microsoft Edge (desktop, version 90 or later). Other browsers — including Firefox, Safari, and mobile browsers — are not supported and may produce incorrect layouts, failed exports, or other errors. We make no warranties regarding SpreadViewer's performance in unsupported environments.
SpreadViewer is a client-side application. All project data — including manuscript text, layout configurations, uploaded images, and settings — is stored locally on your device using your browser's localStorage and, when you save a project file, on your own file system. We do not store, back up, or have any access to your project data.
You acknowledge and accept the following risks inherent to local browser storage:
We strongly recommend saving your project as a file frequently and maintaining your own backups.
SPREADVIEWER IS PROVIDED ON AN "AS-IS" AND "AS-AVAILABLE" BASIS. TO THE FULLEST EXTENT PERMITTED BY LAW, WE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
We do not warrant that files produced by SpreadViewer will meet KDP's requirements, be accepted by KDP, or produce commercially acceptable print results. Print color accuracy — particularly for color interiors — depends on KDP's printing process and is outside our control. We strongly recommend ordering a proof copy before any bulk print order.
TO THE FULLEST EXTENT PERMITTED BY LAW, IN NO EVENT WILL WE BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES ARISING OUT OF YOUR USE OF SPREADVIEWER, INCLUDING BUT NOT LIMITED TO LOSS OF DATA, LOSS OF CREATIVE WORK, OR LOSS OF PROFITS. OUR TOTAL LIABILITY TO YOU WILL NOT EXCEED THE AMOUNT YOU PAID FOR YOUR LICENSE.
You agree to defend, indemnify, and hold harmless Flat Rate Digital LLC and its officers, employees, and agents from any claims, liabilities, or expenses arising out of your use of SpreadViewer, your content, or your breach of these Terms.
SpreadViewer stores project data locally in your browser's localStorage and does not transmit your manuscript content or project files to any server. Your license key is stored in localStorage and transmitted to LemonSqueezy solely for license validation. SpreadViewer loads fonts from Google Fonts APIs. We do not use analytics, tracking pixels, or advertising within SpreadViewer. See our Privacy Policy for full details.
These Terms are governed by the laws of the State of Alaska, without regard to its conflict of law provisions. Any disputes shall be resolved in the courts of Fairbanks, Alaska. These Terms constitute the entire agreement between you and us regarding SpreadViewer. If any provision is found unenforceable, the remaining provisions remain in full force.
Flat Rate Digital LLC
1511 3rd Ave Suite 1002, Seattle, WA 98101, United States
Email: questions@spreadviewer.com
Website: spreadviewer.com
Last updated: June 6, 2026
This Privacy Notice for Flat Rate Digital LLC ("we," "us," or "our") describes how and why we might process your personal information when you use SpreadViewer or visit spreadviewer.com.
Questions or concerns? Contact us at questions@spreadviewer.com.
Short version: SpreadViewer runs entirely on your device. Your book content never leaves your computer. The only personal data we handle is your email (collected by LemonSqueezy at purchase) and your license key (stored locally on your device).
Purchase and license data. When you purchase SpreadViewer through LemonSqueezy, LemonSqueezy collects your email address and payment information. We receive confirmation of your purchase and your license key. All payment data is handled exclusively by LemonSqueezy under their Privacy Policy.
License activation. When you activate SpreadViewer, your license key and a device instance ID are transmitted to LemonSqueezy's servers for validation. This data is stored in your browser's localStorage. We do not store this on our own servers.
Support communications. If you contact us for support, we collect your email address and message content.
Google Fonts. SpreadViewer loads fonts from Google Fonts. When your browser requests fonts, Google may receive your IP address as part of a standard HTTP request. This is subject to Google's Privacy Policy.
Your book content. All manuscript text, images, and project data are stored locally in your browser's localStorage or exported as files to your computer. This content is never transmitted to our servers.
We do not use analytics, tracking pixels, cookies, or advertising of any kind within SpreadViewer.
We process your personal information solely to:
We do not use your information for advertising, profiling, or marketing.
LemonSqueezy. Your email and license information are processed by LemonSqueezy to fulfill your purchase and validate your license. LemonSqueezy is the merchant of record for SpreadViewer purchases.
Business transfers. We may share your information in connection with any merger, sale, or acquisition of our business.
Legal requirements. We may disclose your information where required by law or in response to valid legal process.
We do not sell, rent, or trade your personal information to third parties.
Purchase records are retained as long as required to provide support and comply with applicable tax and accounting laws. Support communications are retained for a reasonable period to resolve ongoing issues. License keys stored in your browser's localStorage remain until you clear your browser data.
We rely on LemonSqueezy's industry-standard security infrastructure for payment and license data. SpreadViewer's architecture minimizes risk by design: your book content never leaves your device, and only license validation data is transmitted over the internet. No electronic transmission is 100% guaranteed to be secure, and you should access SpreadViewer in a secure environment.
SpreadViewer is intended for adults. We do not knowingly collect data from or market to children under 18. If you believe we have inadvertently collected information from a minor, please contact us at questions@spreadviewer.com.
Depending on applicable law, you may have the right to access, correct, delete, or obtain a copy of your personal data, and to withdraw consent to our processing. To exercise any of these rights, contact us at questions@spreadviewer.com.
SpreadViewer does not use analytics or tracking technologies. DNT signals do not change our data practices. If a uniform DNT standard is adopted in the future, we will update this notice accordingly.
Residents of California, Alaska, Colorado, Connecticut, and other states with comprehensive privacy laws may have additional rights. Because SpreadViewer collects minimal personal data and does not sell it for advertising, many of these rights are satisfied by our default practices.
| Category | Examples | Collected |
|---|---|---|
| Identifiers | Email address (via LemonSqueezy purchase) | YES |
| Commercial information | License purchase transaction record | YES |
| Internet/network activity | IP address sent to Google Fonts & LemonSqueezy APIs | YES |
| Personal info (CA Records statute) | Name, contact info | NO |
| Protected classification characteristics | Gender, age, race, ethnicity | NO |
| Biometric information | Fingerprints, voiceprints | NO |
| Geolocation data | Precise device location | NO |
| Sensory information | Audio, video recordings | NO |
| Professional/employment information | Job title, employment history | NO |
| Sensitive personal information | Health data, financial account data | NO |
To submit a privacy rights request, email questions@spreadviewer.com. We will verify your identity and respond within the timeframe required by applicable law. If you are unsatisfied with our response, you may submit a complaint to your state attorney general.
We may update this Privacy Notice from time to time. The updated version will be indicated by the date at the top of this page. We encourage you to review this notice periodically.
Flat Rate Digital LLC
1511 3rd Ave Suite 1002, Seattle, WA 98101, United States
Email: questions@spreadviewer.com
Website: spreadviewer.com
To request access to, correction of, or deletion of personal information we hold about you, email questions@spreadviewer.com with your name, the email used for purchase, and the nature of your request.
Note: your book content, project files, and manuscript data are stored only on your own device. We have no access to this content — you control it entirely.