+
+

Related Products

  • PDF Guru
    95,963 Ratings
    Visit Website
  • Nutrient SDK
    111 Ratings
    Visit Website
  • RAD PDF
    3 Ratings
    Visit Website
  • MobiPDF
    7,811 Ratings
    Visit Website
  • Digital WarRoom
    55 Ratings
    Visit Website
  • MobiOffice
    15,505 Ratings
    Visit Website
  • Apryse PDF SDK
    159 Ratings
    Visit Website
  • Foxit Document Workflow APIs
    8 Ratings
    Visit Website
  • PDFCreator
    557 Ratings
    Visit Website
  • Datasite Diligence Virtual Data Room
    692 Ratings
    Visit Website

About

Most online PDF tools upload your file to a server to do the work. KeptPDF does the work right in your browser: 25 tools including redact, sign, compress, OCR, organize, and compare. Your document is never part of a single request. The proof takes ten seconds: load the page, turn on Airplane Mode, and every tool still works. Free tier with no account. Pro adds bulk actions, personal redaction lists, and exports for $29/mo. The redaction engine auto-detects names, SSNs, phone numbers, addresses, and dates, removes the underlying text instead of drawing a box over it, and prints an audit certificate on every file that anyone can verify. A command line version runs the same engine on your own servers for bulk work: scanning bureaus, litigation support teams, and records departments process thousands of PDFs in one pass.

About

MangoWriter is a secure text editor for Windows designed to run completely offline with no cloud, AI, network connections, or telemetry, offering a familiar, simple editing experience while keeping content private by default. It uses state-of-the-art AES-256-GCM encryption with strong key derivation (Argon2id) and optional keyfile two-factor support, ensuring no plaintext is ever written to disk and eliminating caches or temp files. MangoWriter protects your work with a secure clipboard that binds copied content to the current session, an instant lock screen to mask content when stepping away, and one-click bulk redaction tools to permanently black out selected text across documents. Sensitive buffers are zeroed after use and your password never gets stored on disk, with key material kept only in secure memory while a document is unlocked. It is delivered as clean, code-signed builds available as an MSI installer or portable ZIP and includes secure export options.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Law firms, accounting practices, clinics, and anyone who shares documents they cannot afford to leak

Audience

Professionals and individuals who need a secure offline text editor to write and protect sensitive text with strong encryption and redaction tools

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

$0 (Pro $29/month)
Free Version
Free Trial

Pricing

No information available.
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

KeptPDF
Founded: 2026
United States
keptpdf.com

Company Information

MangoWriter
mangowriter.net

Alternatives

Alternatives

Redact

Redact

Fordata

Categories

PDF

KeptPDF is a PDF toolkit that runs entirely in your browser. Nothing uploads: redaction, OCR, compression, signing, splitting, merging, and the rest of its 25 tools all run on your own device, so the document never touches a server. The redaction engine auto-detects names, SSNs, phone numbers, addresses, and dates, removes the underlying text instead of covering it, and prints a verifiable audit certificate on every file. A command line version handles thousands of PDFs in one pass for scanning bureaus, litigation support teams, and records departments. The core tools are free with no sign-up.

Categories

PDF Features

Annotations
Convert to PDF
Digital Signature
Encryption
Merge / Append
PDF Reader
Watermarking

Integrations

.NET
Google Drive
Windows 10
Windows 11

Integrations

.NET
Google Drive
Windows 10
Windows 11
Claim KeptPDF and update features and information
Claim KeptPDF and update features and information
Claim MangoWriter and update features and information
Claim MangoWriter and update features and information