BleachPDF vs RedactFile

BleachPDF is a free desktop utility for Linux and macOS that redacts sensitive information from PDF files, including scanned pages. It converts each page into an image, applies OCR to locate text you specify, covers matches with black boxes, and writes a new PDF. The resulting file contains images only, so it has no hidden text layer that could reveal redacted wording through copying and pasting. Matching can use exact text or more complex patterns, including case-insensitive rules and digit patterns. Its command line accepts a folder or file pattern for batch processing. After redaction, BleachPDF rescans the output; if matching text is still exposed, verification fails and processing stops. It runs locally without uploading documents. Installation uses pip and requires Tesseract, with OCR language selection such as eng or eng+kor. Handwriting, unusual fonts, poor scans, and tiny dense text can cause recognition errors, so manual checking is advised.

RedactFile is a web and API service for identifying and removing sensitive information from documents and images before sharing them. Its OCR and PII detection can find names, emails, phone numbers, IDs, account data, and addresses, including in scanned PDFs. Users can review matches, add redaction marks themselves, apply changes, and export a protected copy. Methods include black boxes, blur, pixelation, masking, replacement labels, and removal. File cleanup tools check metadata, comments, author data, OCR layers, annotations, bookmarks, embedded files, forms, and scripts. Some supported browser workflows process files locally; upload, dashboard, public-link, and API workflows may use RedactFile infrastructure and storage. The external v1 API supports OCR and structured extraction through JSON requests with document URLs and an API key; documentation includes JavaScript and Python examples and signed asynchronous webhooks. RedactFile publishes tests and a checker for examining recoverable text and hidden file data. It cautions that the service is not a compliance certification or guarantee that every document is safe to disclose, and recommends manual validation for regulated disclosures. The free plan costs nothing and has a 2MB upload limit, 10 daily uploads, 500MB storage, and no API.