Subject access request redaction software
Redact SAR documents without uploading sensitive files. RedactProof runs in your browser with AI-powered detection, bulk processing, and tamper-evident verification - built for the pressure of SAR deadlines.
By RedactProof Editorial Team · 30 Mar 2026
What a SAR workflow demands from redaction software
Subject access requests require you to disclose personal data while protecting third-party information, legally privileged material, and other exempt content. The redaction tool you choose needs to handle this under time pressure - typically 30 days under UK GDPR, with extensions only in limited circumstances.
A practical SAR redaction tool must support:
- Accurate detection of personal identifiers across varied document types - names, addresses, national insurance numbers, dates of birth, and dozens more
- Bulk processing for multi-document bundles that are common in SAR responses
- Permanent redaction that cannot be reversed by removing annotation layers or copying hidden text
- Audit evidence that redactions have not been tampered with after the fact
- Data minimisation during the redaction process itself - the tool should not require uploading sensitive documents to external servers
How RedactProof handles SAR redaction
Frequently Asked Questions
Does RedactProof upload SAR documents to the cloud?
No. By default, RedactProof processes PDFs entirely in your browser. Files are opened, rendered, and redacted locally on your device, so SAR documents are not uploaded to our servers. If you enable the optional Pro Detection Engine, only extracted text (not the original files) is sent to Cloudflare for enhanced detection.
Can recipients reverse or bypass RedactProof redactions?
RedactProof uses pixel-burn redaction. Each page is rendered to an image and redaction areas are burned into the pixels before a new PDF is created. The original text is destroyed, so it cannot be recovered by removing annotations, copying hidden text, or using PDF inspection tools.
How does RedactProof help with SAR deadlines and large document sets?
For large SARs, RedactProof offers AI-powered PII detection and bulk processing. You can load multiple PDFs, run detection across the entire bundle, review suggested redactions, and export everything in one go. This reduces manual review time and helps you stay within typical 30-day SAR deadlines.
What evidence does RedactProof provide if a SAR response is challenged?
Paid plans include a tamper-evident verification certificate with each export. The certificate contains an Ed25519 digital signature and SHA-256 hash of the redacted file. Anyone can use this to confirm that the document has not been modified since export, supporting your audit trail if a SAR response is disputed.
Redact with confidence
RedactProof detects PII across your documents without uploading them. Start with a free account.