Free Document & PDF Redactor (Black Out Text)
Blackout confidential PII, social security numbers, credit cards, emails, API keys, and custom client names before sharing documents with third parties or submitting to public LLM chatbots.
Black Out Sensitive Data, Share with Confidence
Never leak customer credentials, employee identities, or trade secrets to public AI chatbots. Redact confidential data directly inside your browser.
Hide Private Info Before Sharing With AI Chatbots
Public LLMs train on user prompt history. Pasting customer data, contracts, or codebases directly into chatbots violates GDPR, HIPAA, and SOC-2 compliance.
Safe for Legal, Financial & Medical Documents
Legal teams and medical professionals require verified redaction before sharing discovery documents. Our dual-pane view lets you review every single masked entity side-by-side.
Download Redaction Summary & Proof
Need proof of sanitization for your data protection officer? Export an itemized JSON audit report containing counts, detected categories, and timestamped verification.
100% Private in Your Browser — Zero Server Uploads
Other redaction services upload your unredacted documents to remote cloud servers to process regex. Our redactor executes 100% within your client browser memory.
How to Use Document Redactor
Fast, intuitive, and 100% client-side. No signups, no watermarks, no server delays.
Open Document
Upload any multi-page PDF or image file. Rendered instantly in browser memory.
Apply Redaction
Draw permanent blackout boxes or use auto-redact presets for SSN, emails, and phone numbers.
Export Flattened
Download permanently flattened PDF or image. Underlying text is destroyed and cannot be uncovered.
Your Files Never Touch Our Servers
True client-side rasterization. Text beneath blackout boxes is permanently scrubbed from the vector stream. Files never leave your local browser RAM.
Common Questions About Document Redactor
Clear answers about performance, browser compatibility, and our zero-data retention model.
Can redacted text be uncovered or recovered from the exported PDF?
No. ZeroTool permanently bakes and rasterizes the redaction boxes into the document pixels, destroying the underlying text stream. Once exported, redacted content cannot be recovered with copy-paste or PDF inspection.
Are sensitive documents uploaded to any third-party server?
Never. All PDF rendering, OCR-free box stamping, and flattening occur strictly inside your device's browser memory via Canvas.
Can I redact both text documents and scanned ID photos?
Yes. ZeroTool Document Redactor supports standard multi-page PDFs, scanned images, PNGs, and JPEGs.
Does this support automatic redaction of emails and numbers?
Yes. Built-in pattern presets let you highlight and redact email addresses, phone numbers, and Social Security / ID formats with one click.