Silo Redact.
A black box drawn over a PDF hides nothing. Silo Redact removes the text, then attacks its own export to prove it is gone.
Silo Redact proposes what to remove, holds Apply until you have decided every finding, rebuilds each page from redacted pixels, and then re-opens the export to try to get your text back. It also includes a sample document filled with invented data, Batch folder scans, reason codes you define, and Clean & Verify for hidden data in PDFs and images.
Available todayReal redaction, not a black rectangle
Apply rebuilds every page from redacted pixels. The exported PDF is image-only: no text layer, form field or metadata from your original survives anywhere in the file, which is why the redaction cannot be undone. It also means the export is not searchable, so keep your original for your own reference.
Available todayNothing is redacted until you accept it
Detection proposes and you decide. Accept or reject every finding, drag on the page to box anything it missed, and Apply stays locked while a single suggestion is still pending. Silo Redact cannot promise it found everything; the final review is yours.
Available todayIt tries to break its own work
After burn-in, the verifier re-opens the export with two independent text extractors, a structural scan, fresh text recognition over every page and embedded image, a byte-level sweep for recoverable images, and a check that nothing unreviewed slipped through. The PDF and its verification report are separate saves.
Available today.
US Social Security, card, bank routing and employer ID numbers, driver's license and passport numbers, emails, phone numbers, dates, postal addresses, form-field values and personal names, with text recognition for scanned pages. Card and routing numbers must pass their checksums. Tuned for English-language documents and US identifier formats.
Page thumbnails lead to the exact source box for each finding, with its confidence, reason and origin. Accept or reject with the pointer or the keyboard.
A file that passes is exported with a -REDACTED name, and its report lists each check with the SHA-256 hashes of input and output. If the review cannot be fully corroborated, the export is marked UNVERIFIED. If removed text is proven to survive, the file is named -FAILED-DO-NOT-SEND and is never presented as a redaction.
Scan a folder against a saved detection profile and each file's findings wait for you in Review. Batch never accepts or applies anything for you. Reason codes you define can be burned inside each box, so a production shows why every item was withheld.
A built-in sample document filled with fake personal data runs the whole cycle (detect, review, burn, verify) with no download, before you trust Silo Redact with a real file.
Strips document info, XMP, embedded scripts and actions, attachments and page thumbnails from PDFs, and EXIF and GPS from JPEG and PNG images, then re-checks the result independently. Your source file is never modified, and a clean that does not verify is quarantined instead of saved.
Pattern, form-field, text-recognition and name detection ship inside the app. Detection, burn-in and verification run on your Mac with no account and no document upload.
An optional contextual detection tier is a separate download of roughly 3.6 GB. Before it starts, Silo Redact shows its size, license, download hosts, integrity policy, storage location, the free space it needs and whether your Mac fits. Decline it and everything above still works.
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Paper in, searchable PDFs out.