Legal
Privacy
This page describes how Nelstack handles information based on the current implementation. It is not legal advice.
Browser-side tools
Stamp Maker (editor, exports), Stamp PDF, Online Signature draw/type, Sign PDF, Sign Documents, and Bill Generator PDF preview/download are built to run in your browser. Those workflows are designed so document and image bytes are processed locally for the primary generate/download path.
We do not claim that “files never leave your device” in every circumstance (for example, if you email yourself a download, sync a folder to cloud storage, or use browser extensions). We also do not claim zero data collection for the entire website.
Image Tools processing modes
Browser mode processes images on your device. Where Server mode is available, choosing it and starting processing uploads originals and your selected edits to our server. Images are temporarily stored for processing and automatically deleted within one hour of upload acceptance. Completed downloads, cancelled jobs and failed-job files are deleted sooner. Images are not retained permanently or used to train models.
Contact form
If you use the contact form, the message contents and the contact details you provide are sent to our email delivery provider (Resend) so we can respond. Do not submit passwords, OTPs, full account numbers, or other sensitive secrets through the form.
Finance rates and calculators
Metal rate pages fetch rate data from our API for display. Calculator math runs in the page for the interactive tools. Calculator inputs are not stored as user accounts.
Analytics
If Google Analytics is configured for a deployment, standard analytics events may be collected according to that configuration. When analytics is not configured, that script is not loaded.
Local storage
Some tools may keep drafts or recent items in your browser’s local storage so you can resume work on the same device. Clearing site data removes those drafts.
Questions
For privacy questions, use the contact page. See also our Terms.