Edit & Sign PDF: Signature, Watermark, Page Numbers
Signing and marking up a document is exactly when privacy matters most. These tools let you sign, watermark, and number any PDF inside your browser, so a contract you are about to sign or an invoice you are about to brand never leaves your device.
Sign PDF
→Draw or type a signature, place it anywhere.
Watermark PDF
→Stamp text or image: opacity, angle, position.
Page Numbers
→Add page numbers: choose position, range, style.
Crop PDF
→Trim margins from every page.
Flatten PDF
→Lock filled form fields into the page.
Resize PDF
→Rescale pages to A4, Letter, and more.
Fill PDF Form
→Type into interactive form fields.
Signing a PDF on your device
Sign PDF lets you draw, type, or upload a signature image and place it anywhere on any page, then save the signed file locally. It is ideal for one-off approvals and internal documents. When a multi-party agreement also needs a tamper-evident, independently verifiable audit trail, that is a different job, handled by a verification layer like Nijam Seal rather than a quick on-device signature.
Watermarks: branding and document control
Watermark PDF stamps text or an image across pages, with control over opacity, rotation, and position. Use a diagonal CONFIDENTIAL or DRAFT stamp to mark document status, or a logo to brand a proposal. You can target specific pages or tile the mark across the whole page. Because it runs locally, you can watermark a sensitive draft without exposing it.
Page numbers for long documents
Page Numbers adds clean numbering with a choice of position, format (including Roman numerals for front matter), starting number, and a skip-first-page option for cover pages. It is the finishing touch on a merged report or a compiled contract, and like every tool here it edits the file in your browser with no upload.
Signatures, watermarks, and page numbers are drawn directly into the PDF locally with pdf-lib. Your signature image, your draft stamp, and the document itself stay in browser memory and are discarded when you close the tab. No server ever sees the file or the mark you applied.
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