Redact PDF

Redaction paints opaque black regions into page pixels before building a completely new PDF from those cleaned images. Original PDF text, objects, metadata, annotations, attachments and interactive fields are not copied. All exported pages become image-only; searchable text and vector quality are lost. Regions are manual: there is no automatic sensitive-data detection or text-search redaction. Review the entire document, including visible information outside the marked areas.

Use an unlocked PDF up to 20 MB and 100 source pages. Files and output stay in this browser. Work is not saved after leaving the page. Modifying a digitally signed PDF invalidates its signatures; retain the original. Forms, annotations, bookmarks and document-level interactive features may not survive page rewriting. These tools are not intended to preserve certified or archival conformance.

Open the exported PDF and inspect every covered area at a high zoom. Confirm that all sensitive content, including other pages, is covered or excluded. Do not share the original or assume marking a few regions detects all private information.

Files and entered content are processed on your device in this browser tab. File contents and results are not uploaded to Helphonic or sent to analytics. The page still contacts Helphonic to load its tools, check access and confirm non-content usage information. Work is not saved to your account; download or copy results before leaving or reloading the page.

Use a current browser and smaller inputs if the tab runs out of memory. Some tools download a local processing library or model on first use, so an internet connection is needed even though your content stays on the device.

If the tool reports that access or limits changed, review the current policy and run it again. If usage confirmation is uncertain after an interrupted connection, a retry can count as another operation. Download completed work before reloading; this site does not keep a recovery copy.