Privacy Policy
How we handle your files and data across every tool on Stelluna.
Last updated: August 16, 2026
Overview
Stelluna (stelluna.io) is a collection of free, browser-based tools — image and video editors, PDF utilities, and YouTube creator tools. This page explains what data we collect, how each tool actually handles your files, and how our third-party services (analytics, advertising, sign-in) work.
How your files are handled
Most tools on Stelluna run entirely inside your browser — your photo, video, or PDF is processed on your own device using standard web APIs (Canvas, WebAssembly, WebCodecs) and is never sent to our servers. This applies to the compressors, converters, resizers, PDF utilities, the QR code generator, the screen recorder, and the AI-powered Image Upscaler and Object Remover (the AI model runs client-side too — only the model itself is downloaded to your browser, your photo stays local).
A small number of tools work differently, and we're explicit about which ones on their own pages:
- Watermark Remover — your video is uploaded to our server to be processed, then deleted immediately once the result is ready.
- YouTube Niche Analysis and YouTube Comment Analyzer — no file is uploaded; the search term or channel you enter is sent to our backend, which queries the YouTube Data API and caches the result.
- AI YouTube Thumbnail Maker — not yet publicly available; when it launches, an uploaded reference photo will be sent to an AI image generation provider to produce the thumbnail, then deleted from our server.
Account data
Creating a free account is optional and only needed for unlimited daily usage; you can use every tool without one, within the free daily limit. If you sign in with Google, we store your name, email address, and a record of which tools you've used (for your own usage history) — nothing else from your Google account.
Cookies and analytics
We use Google Analytics to understand overall traffic and which tools are popular — this sets standard analytics cookies. If you sign in, we set a session cookie to keep you logged in. We also keep basic server logs (IP address, page visited, browser type) for security and internal usage statistics; we derive an approximate country/city from the IP address using an offline lookup, we don't track precise location.
Advertising
Stelluna is supported by Google AdSense. Google may use cookies to serve ads based on your visits to this and other sites; you can review or opt out of personalized advertising through Google's Ad Settings. See Google's own policies for how they handle data collected through AdSense.
Third-party services we use
- Google Analytics — traffic and usage statistics
- Google AdSense — advertising
- Google Sign-In — optional account creation
- YouTube Data API — powers the Niche Analysis and Comment Analyzer tools
Data retention and your rights
Files processed by backend-dependent tools (like Watermark Remover) are deleted immediately after processing — we don't keep a library of your uploads. Account data is kept for as long as your account is active. To request deletion of your account or any data we hold about you, email us — see Contact below.
Children's privacy
Stelluna is not directed at children under 13, and we don't knowingly collect personal information from children.
Changes to this policy
We may update this policy as the site changes. The "Last updated" date at the top reflects the most recent revision.
Contact
Questions about this policy or your data: support@stelluna.io