What VelloDoc is
VelloDoc is a collection of focused tools for the document jobs that come up again and again: merging a set of PDFs, splitting out a few pages, shrinking a scan to fit an upload limit, turning a Word file or a folder of photos into a PDF, pulling text back out, or removing information before a document is shared. Each tool does one job, shows only the settings that change the result, and hands back a file. There’s nothing to install and nothing to sign up for.
Why there’s no account
Most document tasks are one-off. Asking for an account before someone can rotate a page adds friction and creates a store of personal data that has to be protected for no real benefit to the person using the tool. VelloDoc therefore keeps no user accounts and no file history. Nothing is stored in your browser either: the language you read the site in comes from the page address.
How files are handled
VelloDoc is a server-side service. When you process a file, it’s uploaded over an encrypted connection to VelloDoc's server and written to a temporary job folder with a random name. The tool runs against that copy, and the result is returned directly in the same response. As soon as the download completes, the job folder is deleted. Failed jobs are deleted immediately, and if a job is interrupted, a cleanup that runs every minute removes job folders older than 30 minutes. Uploads are size-limited, processing is time-limited, and requests are rate-limited so that one user can’t degrade the service for everyone else. The file security page, the limits page and the privacy policy go into more detail.
How the tools are built
The processing is done by open-source document software running on the server: PyMuPDF for most PDF page operations, Ghostscript for compression and PDF/A, LibreOffice for office formats, Tesseract for OCR, WeasyPrint for rendering text and web content, and Pillow for images. Using these engines directly means the behavior of each tool can be explained plainly, and no document is passed to an outside conversion service.
What the tools don’t do
Some limits are worth stating up front. Converting a PDF back into Word, Excel or PowerPoint is best-effort: text and page images come across, but a complex layout won’t rebuild perfectly. Add Text to PDF places new text on a page but can’t change text that’s already there, and Scan to PDF doesn’t detect page edges or correct perspective. The Sign PDF tool places a visual signature on the page. It isn’t a certificate-based digital signature. OCR can misread small type, handwriting and unusual layouts, so recognized text should be checked before it’s relied on. Each tool page lists its own limitations.
How the guides are written
The guides explain the document problems behind the tools, like why a scan is large, what makes a PDF searchable or what a PDF can reveal about its author. They’re written from how the tools actually behave and are updated when that behavior changes. Where a figure is a rule of thumb instead of a guarantee, the guide says so.
Contact
For support questions, accessibility feedback, privacy requests or abuse reports, use the contact page. Please describe the problem without attaching confidential documents or passwords.