free software to redact in pdf

You can try free trial of pdffiller service. They have very good and flexible editor and make refund quite fast if you will not like it.

You will need to make PDF editable first, then to redact the PDF.#1 Google DocsLogin into your Google AccountGoogle Drive,Click "New" File Upload, import the PDF file that you want to make in editable formatOnce uploaded, right click to "Open with Google Docs", if your PDFs are scanned copies, an OCR processing will start automatically,Your PDF will be opened in Google Docs, choose "File""Download As" to choose the editable output format you want to save your PDF as.#2 AdobeOpen PDF with Adobe Acrobat ProGo to ViewToolsRecognize Text in This File to make PDF editable on macNow the PDF file is editable now, you can edit the PDF file as you want to in Adobe, then go to “File” and export PDF as other editable format.

In my understanding, you want to change original text in PDF, am I right?If your PDF is native file which is searchable and selectable, you can open it with PDFelement on your PC or Mac, and directly edit it under “Edit” mode. (see image below) Edited text would automatically match original font and size.If your PDF is scanned or images, you need to OCR(Optical Character Recognition) first to convert it into searchable and editable file. PDFelement 6 Pro can complete the OCR.Original file:After OCR:After OCR, then you can edit the PDF file directly under “Edit” mode.If you want to edit PDF on you iPhone, you can have PDFelement for iOS. As I know, it is the only free App offering PDF text editing and converting feature in Apple Store. (Please note, iOS version does not include OCR, therefore, you can only edit native PDF file. For scanned PDF, you can only annotate with drawing tool)

Foxit Phantom can do it :PDF Editor,PDF Editor Download,PDF Text Editor | Foxit SoftwarePDF Editor – Perform all your document updates in PDFDocuments evolve over time, requiring the needs for multiple file formats to be updated – the word processor, page layout, and file sharing formats. Now, once it’s converted into PDF, update it in PDF.Paragraph edit and have text flow across multiple paragraphs, columns, and pages.Change the document layout by moving text boxes, changing its sizes, or how text is justified.Professionalize documents by adding stamps, watermarks, headers, footers, bates number, etc.Organize – Manipulate PDF files and pagesOften we create new documents from pages of existing documents. PhantomPDF allows you to quickly and easily organize and manipulate your PDF to support your workflows.Merge PDF documents together or split PDF apart.Drag and drop pages within a document or from one document to another.Crop, delete, add, swap, flatten, and rotate PDF pagesCollaborate and Share – Annotate, share, and collaborate with PDFWhen teams collaborate and share information, they work at their best. PhantomPDF links knowledge workers together to increase flexibility and results.Integrate with leading Content Management Systems.Utilize popular storage sharing products.Initiate shared reviews and provide and manage comments.PDF Creator – Create PDF docs, forms, and portfoliosThe connected world shares documents in the PDF format. PhantomPDF allows you to create PDF from all file formats. Foxit is the first vendor to deliver PDF 2.0 file view.Create PDF, PDF/A, PDF/X, and PDF/E from Microsoft Office and virtually any file format.Create PDF Portfolios to tie multiple files together and PDF Forms to collect data.Convert webpages to PDF from the Chrome, Internet Explorer, and Firefox browsers.Convert PDF – Share Information on PDF with Other File FormatsMany workflows require information within PDF documents be shared in other file formats. PhantomPDF enables users to export PDF into popular file formats.Convert PDF to Word, PowerPoint, and Excel.Convert PDF to image formats such as JPEG and PNG.Convert PDF to HTML and text.Scan and OCR – Scan to PDF, OCR PDF, and edit scanned PDFsMany times hardcopy documents are required to be in digital format. PhantomPDF supports capabilities to support your paperless office workflows.Interfaces with your scanner to scan and convert to PDF. Will convert existing scans (i.e. images) to PDF.OCRs image based content into selectable and searchable text. OCR (Optical Character Recognition) identifies characters and words within images.OCR option to make text editable, which is really valuable when updating documents when you only have the hardcopy.Protect and Sign – Encrypt, redact, and sign PDFsMany documents contain confidential information. Don't just protect your perimeter, protect information by protecting the documents themselves. PhantomPDF provides multiple security options.ConnectedPDF Powered - grant and revoke document access.Extends usage control of Microsoft Rights Management Services to PDF documents.Permanently remove (redact) visible text and images from PDF to protect sensitive information.Section 508 Compliance – Document Accessibility Through Assistive TechnologyPhantomPDF enables PDF document accessibility for people with disabilities who use assistive technology to have access to information.JAWS (Job Access With Speech) compatibility allowing blind and visually impaired users to read the screen either with a text-to-speech output or by a refreshable Braille.Checks accessibility of PDF files to verify if the document complies with Section 508 technology standards. Identifies and provides fixes for accessibility checker failed results to make the PDF file comply with Section 508 technology standards.Enables users to easy create JAWS compliant PDF from files using Microsoft Office file formats.PhantomPDF Online – Cloud based PDF EditorPhantomPDF comes bundled with PhantomPDF Online, a cloud based PDF editor which provides many of the same capabilities as the PhantomPDF product.PDF editor capabilities available through a web browser, so you have access everywhere, all the time.Bundled with PhantomPDF subscriptions.Bundled with PhantomPDF 1-time purchases for one year and customers who are current on maintenance.Try PhantomPDF Free for 14 Days!

Yes, PDF converters are completely safe to use on files with sensitive information. In fact, PDF converters are probably the only way to safely handle such files because they offer features that work specifically towards securing confidential information.Provided that the PDF conversion software isn’t pirated or offered by a less than reputable company, you can be sure that your data is being handled with care.Of course, you also need to do your own research first, though. To start, you should only download PDF software that doesn’t require the internet or other applications to convert a file. Your data should never be compromised by any other application or sent over an unsecured connection.Able2Extract Professional, for example, uses local-only technology preventing access to your valuable documents and files to anyone but local users. No data is recorded or sent out at any time. The software delivers all of its features in a sandbox environment--no need for an internet connection, network access, or communication with external servers. Everything is done locally, from the safety (and with the resources) of your own computer.Also, if you need to deal with extra confidentiality issues, the PDF software you choose should keep the bigger PDF security picture in mind with things like:PDF encryption and decryption featuresThe ability to set permissions for password-protected filesPDF redactionThe ability to add watermarks to PDFsAt Investintech, we make sure the desktop version of Able2Extract Professional ticks off all the above boxes so you get all the security you need in one PDF tool. There’s a 7-day free trial you can test out to see how it handles sensitive information.

To me ZetPDF is much better pdf SKD for developing .NET applications to Create, Edit, Convert, Protect or Print PDF documents. The official site to download is ZetPDF - PDF library for .NET, Windows Forms, ASP.NET, Mono, WPF, Silverlight