Percentage Calculator - 7-in-1 Math Tool with PDF & Social Share
Preview and demo
Status: available · Last verified 21. 9. 2026. Availability checks are not a security guarantee.
Description
A highly accurate, responsive, and easy-to-use Percentage Calculator for everyday math needs. This tool combines 7 essential calculation modes into one sleek interface, including Percentage Increase/Decrease, Average Difference, and Value Difference. It features a clean design, robust input validation to prevent errors, and allows users to accumulate multiple results in a table. Users can easily download their calculations as a PDF or share them via social media. Built with pure HTML, CSS, and Vanilla JavaScript, it requires no backend setup.
Features
Requirements
Any modern web browser (Chrome, Firefox, Safari, Edge).
Basic web server to host the files (or runs locally).
No backend, database, or server-side language required.
Changelog
Version 1.0.0 - September 21, 2026
- Initial Release.
- Added 7 percentage calculation modes.
- Added PDF export and social sharing features.
- Implemented input validation for error-free calculations.
Automated Security Scan Passed
- Product version:
- 1.0.0
- Archive verified:
- Yes
- Scan date:
- 21 September 2026
- Malware scan:
- Passed
- Secret detection:
- Passed
- Dependency scan:
- Not applicable
- Static analysis:
- Passed
A passed automated scan does not guarantee that the software is free from every vulnerability or security risk. The result applies only to this version. View scan methodology
Technical requirements
- Vanilla JavaScript
- Shared hosting compatible
What is included
- Full application package with full downloadable files
- Documentation included for installation and setup
- Readable source code for customization
- 9 listed features
- Working live demo or preview access
- Changelog included on the product page
Who is this product for
- Buyers who need a full application rather than a custom build from scratch
- Teams shopping within Site Templates
- Projects already using HTML5, CSS3, Vanilla JavaScript
- Use cases aligned with Percentage Calculator, Math Tool, Percentage Increase, Percentage Decrease
License and usage
- Regular license for one end product where end users are not charged for access to the item itself
- Extended license for one end product where end users can be charged
- Verify the exact usage rights on the selected license before deployment or client handoff
- Keep the purchase record and license certificate for future verification
Updates and support
- Typical seller response time: Within 24 hours
- 3 months of seller support included
- Bug fixes and installation help are included during the support period.
- Update Policy: - Free Updates: Any new features or improvements I make to my tools on my official website will also be updated here for free. - Custom Requests: If you need any specific feature or custom change, it will be a paid service. The charges will depend on the type and complexity of the work.
- Use the changelog to confirm ongoing maintenance before rollout
Technical details
- Last updated
- Sep 22, 2026
- Framework
- Vanilla JavaScript
- Frontend stack
- HTML5, CSS3, Vanilla JavaScript
- Shared hosting
- Yes
- Docker
- No
- Composer required
- No
- Node.js required
- No
- Documentation
- Yes
- Source encrypted
- No
- Source obfuscated
- No
- License options
- Regular, Extended
- Support period
- 3 months of seller support included
Marketplace review
Content review processReviewed 22. 9. 2026. The current version was reviewed.
The marketplace reviewed the listing content, package structure and required documentation.
Automated checks looked for suspicious files and common malware indicators.
This is not a full penetration test or a guarantee that the product is vulnerability-free.
License comparison
A license is tied to one end product, not strictly to one domain. Development, staging, and the final production domain may belong to the same licensed deployment.
| Use | Regular License | Extended License |
|---|---|---|
| Source code modification | ||
| Own project use | ||
| One client project | ||
| One production deployment | ||
| Development and staging | ||
| Paid SaaS or paid user access | ||
| Multiple unrelated client projects | ||
| Redistribute source code | ||
| Resell source code |
License FAQ
Can I modify the source code?
Yes, under both licenses.
Can I use the script for a client?
Yes, for one client end product.
Can I install it on a staging domain?
Yes. Development and staging may belong to the licensed deployment.
Do I need another license for another client?
Yes, each unrelated client end product needs its own license.
Can I use it for a paid SaaS?
Yes, with an Extended License.
Can I resell the source code?
No. Standalone redistribution or resale is prohibited.
Is a license limited strictly to one domain?
No. It is tied to one end product, which may use development, staging, and production domains.
Related Items
For one end product — free to end users
Item Details
- Last Update
- September 22, 2026
- Published
- September 21, 2026
- Version
- 1.0
- Category
- Site Templates
- Product Type
- Full application
- Sale Type
- Source Code License
- Sales
- 0
- Reviews
- No reviews
Buying guides
Tags
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License Info
Regular License — Use in one end product which end users are not charged for.
Extended License — Use in one end product which end users can be charged for.
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