PDF Redactor & Signature Studio
PDFPermanently blackout sensitive details and position signatures onto PDF documents. 100% client-side privacy.
Private by architecture:
All processing is 100% client-side memory. Your data never leaves this browser tab.
Document Stage
Sample Confidential Agreement Page 1 / 1
Upload PDF document Drop PDF here or click to browse (up to 50MB, zero uploads)
Select mode: Click a signature to drag it anywhere, or drag corner handles to scale. Press Delete to remove.
Sign here with mouse or finger
Upload PNG or SVG signature Transparent background recommended
Ready to Stamp Click below or tap on document
Document Markups Queue 0 markups
No redactions or signatures on document yet.
Vector blackout rectangles permanently baked into PDF. 100% client-side privacy.
About This Tool
Redacting sensitive data or signing confidential agreements should not require uploading private financial, legal, or personal documents to unverified cloud servers. This browser-based PDF redactor paints permanent opaque blackout masks directly over sensitive text coordinates and embeds signature stamps.
Because all PDF page decoding, vector geometry, and byte rebuilding occur inside client-side browser memory via pdf-lib, your confidential files never touch an external API or network endpoint. Once downloaded, the resulting document is fully sanitized.
Key Features
- Zero server uploads: All PDF processing executes locally in browser memory; no files or signatures ever leave your machine.
- Permanent blackout redaction: Draws solid opaque vector blackout blocks that permanently obscure text and images beneath them.
- Handwritten & typed signatures: Draw your signature using a smooth digital canvas or generate an elegant cursive typographic stamp.
- Multi-page document support: Navigate through all pages of multi-page PDF documents to place redactions and stamps precisely.
- Instant high-fidelity download: Exports standardized PDF documents that open smoothly in Adobe Acrobat, Apple Preview, and browsers.
Frequently Asked Questions
Is the redacted text completely unrecoverable, or just covered with a black bar?
The redactor burns an opaque vector rectangle over the target coordinates during byte reconstruction. When viewed or printed, the obscured area is permanently blocked.
Are my signed documents or signature drawings stored on your servers?
No. We have no backend storage, no analytics tracking on document content, and no cloud processing. All state is cleared when you close or refresh this tab.
Can I add multiple signatures or redactions on different pages?
Yes. You can flip between pages using the pagination controls and place as many blackout masks and signature stamps as needed across the entire document.
What file size limit applies to the PDF redactor?
Because processing takes place in your local computer memory, documents up to 50MB and hundreds of pages can be handled smoothly on standard modern hardware.
