Edit PDF Online

Private PDF workflow

What this Edit PDF tool is best for

PDFKit helps you quickly cover sensitive areas, add notes, and prepare a document for sharing.

Editing and masking PDFs before they leave your device

The most common reason people "edit" a PDF is not rewriting it — it is hiding something before sharing: an account number on a statement, a phone number on an invoice, a salary figure on an offer letter. Doing that on an upload-based editor is self-defeating, because the unredacted original gets uploaded first. PDFKit applies masks, text, and annotations locally in your browser, so the version containing the sensitive data never leaves your computer.

Understand what masking does and does not do. A mask is a solid overlay flattened onto the page — after export, the covered area is opaque in every viewer. It is effective for routine sharing, but it is not certified forensic redaction: if a PDF has selectable text underneath, determined tooling may still find traces in some workflows. For court-grade redaction, follow your organisation's formal process. For "the landlord doesn't need my account balance", a flattened mask does the job.

Scanned documents behave differently from digital ones. A scan is one big image per page, so there is no underlying text layer at all — a mask painted over a scanned account number removes it completely from the exported file. This makes browser-based masking particularly reliable for phone-scanned paperwork, which is most of what people actually share.

After masking, always open the exported file and check every page before sending. Then compress it if it is going by email — masked scans are still scans, and scans are large.