How file processing works
PDF utilities on Toolminator (merge, split, compress, rotate, PDF to JPG) are designed so your documents stay on your device. This page describes the flow in plain language—no marketing fluff.
What happens when you pick a file
- You select a PDF (or images) using the browser file picker. The file is read into memory in this tab via the File API—similar to opening a file in a desktop app.
- JavaScript libraries (notably pdf-lib and, where needed, pdf.js) parse and transform bytes inside your browser. Rotation, page extraction, and merge operations happen without a round trip to our hosting.
- When you click download, the browser builds a new Blob and saves it locally. We do not store a copy on Toolminator servers because static hosting has no upload endpoint for these tools.
What we do not do
- No server-side PDF storage or “cloud queue” for these tools.
- No account login required to process a file.
- No sending file contents to external AI APIs for PDF operations.
Limits you should know
Very large PDFs can be slow or fail due to browser memory limits—especially on mobile. Encrypted PDFs may need passwords before editing. Always keep a backup of originals before batch merges or compression.
Other tools
Image compression and similar utilities also run client-side where labeled. Network requests may still occur for the HTML/JS assets of the site itself, analytics (if enabled), or ads—see our privacy policy. Template generators only send text you type to local logic, not to a model API.