Software Alternatives & Startups
Register | Login

Moon Reader VS KeptPDF

Compare Moon Reader VS KeptPDF and see what are their differences

Moon Reader

Innovative book reader with powerful controls & full functions

Rating
0 reviews
Alternatives Is it good?
KeptPDF

Redact, edit, OCR, and sign PDFs entirely in your browser. The file never leaves your device. Free, no account needed.

Rating
0 reviews
Pricing
Freemium $29 / Monthly (Pro, 1 user)
Alternatives Is it good?
PlexTrac
PlexTrac is the #1 AI-powered platform for pentest reporting and threat exposure management, helping cybersecurity teams efficiently address the most critical threats and vulnerabilities. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, Moon Reader seems to be more popular. It has been mentioned 4 times since March 2021.

social mentions
4 vs 0
Ebooks popularity
100% vs 0%
alternatives listed
34 vs 12

Base details

Website, pricing, platforms and company facts side by side.

Moon Reader
KeptPDF
Website moondownload.com keptpdf.com
Pricing —
Freemium $29 / Monthly (Pro, 1 user) Official pricing
Company — Startup from the United States · 2026
Listed in
eBook Reader Ebooks eBook Manager Science +1
PDF Tools Pdf Redaction OCR PDF Editor PDF Security & Privacy PDF Readers And Editors AI Tools +5

About Moon Reader and KeptPDF

In their own words, as submitted to SaaSHub.

Moon Reader
KeptPDF

No description of Moon Reader yet.

KeptPDF is a PDF toolkit that runs entirely in your browser. Nothing uploads: every tool runs on your own device, so the document never touches a server. What it does: Redaction that auto-detects names, SSNs, phone numbers, addresses, and dates, then removes the underlying text instead of drawing...

Read more about KeptPDF

Features and specs

What each product offers, as listed by its team.

Moon Reader 5 features
KeptPDF 5 features
  • Customizable Reading Settings
    Moon Reader allows significant customization of reading settings, including font type, font size, background color, and line spacing. This helps users create a comfortable reading experience tailored to their preferences.
  • Supports Various Formats
    The app supports a wide range of eBook formats, such as EPUB, PDF, MOBI, and more, providing flexibility in reading different types of digital content.
  • Built-in Dictionary and Translator
    Moon Reader integrates with dictionaries and translation services, allowing users to look up definitions or translations without leaving the app.
  • Sync Across Devices
    With the use of cloud services like Dropbox, Moon Reader can synchronize reading progress, bookmarks, and notes across multiple devices.
  • Advanced Features
    The app offers advanced features such as text-to-speech, annotations, and highlighting, which enhance the reading experience and utility.

Possible disadvantages

  • Advertisements in Free Version
    Users of the free version of Moon Reader are subjected to advertisements, which can disrupt the reading experience.
  • Complex User Interface
    The app's interface can be overwhelming for new users due to the multitude of features and settings offered, leading to a steeper learning curve.
  • Premium Features Locked
    Some of the advanced features, such as the text-to-speech and certain customization options, are locked behind a paywall, requiring users to purchase the Pro version.
  • Limited Customer Support
    Some users have reported limited customer support options, making it difficult to resolve issues or get assistance when needed.
  • Requires Internet for Some Features
    Certain features, like cloud synchronization and dictionary/translator access, require an internet connection, which may not always be available for all users.
  • Simple PDF Editing
    KeptPDF offers straightforward tools for editing, merging, splitting, and converting PDF files, making it accessible for users who need quick document management without a steep learning curve.
  • Web-Based Accessibility
    Being a web-based tool, KeptPDF can be accessed from any device with an internet connection, eliminating the need for software installation and allowing use across different operating systems.
  • Multiple File Format Support
    The platform supports conversion between PDF and various other file formats, offering flexibility for users who work with documents in different formats.
  • No Installation Required
    Since it operates in a browser, users can save storage space on their devices and avoid compatibility issues that sometimes arise with desktop software installations.
  • Quick Processing
    KeptPDF is designed to process PDF tasks efficiently, allowing users to complete common document tasks like compression or conversion in a relatively short amount of time.

Videos

Walkthroughs and reviews on video.

Moon Reader 1 video + Add
KeptPDF 0 videos + Add

Moon Reader for Android: App Review

No KeptPDF videos yet. You could help us improve this page by suggesting one.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Moon Reader
KeptPDF
100% 100%
Ebooks
0% 0%
0% 0%
PDF
100% 100%
100% 100%
eBook Reader
0% 0%
0% 0%
PDF Readers And Editors
100% 100%

Questions & Answers

As answered by people managing Moon Reader and KeptPDF.

What makes your product unique?

KeptPDF's answer:

KeptPDF runs entirely in your browser. Your file, and the text inside it, never leaves your device. Not to an AI, not even to us. You can open your browser's network tab and watch: the document bytes never go out.

Most online PDF tools upload your file to a server first, and some "AI redaction" services quietly send your document text to a third-party model. That is the exact risk people are trying to avoid when they redact something.

KeptPDF also does true redaction. The text is removed from the file, not covered with a black box you can copy out later. Every redaction produces a verification certificate you can share with the file.

Why should a person choose your product over its competitors?

KeptPDF's answer:

Three reasons.

Privacy you can verify, not just a promise. Processing happens locally in the browser, so there is no upload step to trust. We do send anonymous usage counts for quota, and we say so plainly, but never your document.

Real redaction with proof. Removed text is permanently gone, and you get a certificate showing the file was checked for leftover extractable text. Automated detection cannot catch everything, so a final human review is still your job, and the tool says that too.

It works on a phone. Most PDF suites assume a desktop. KeptPDF was built and used on a phone first, so redacting a document while you are standing in a hallway actually works.

How would you describe the primary audience of your product?

KeptPDF's answer:

Anyone who has to hand a document to someone else and needs the sensitive parts gone first.

In practice that is solo attorneys and small law firms, accountants and tax preparers, healthcare and records staff handling requests, HR teams, and individuals dealing with their own medical, legal, or financial paperwork.

The common thread is not an industry. It is a person who cannot upload a confidential file to a random website, and who does not have an enterprise IT budget to solve it.

What's the story behind your product?

KeptPDF's answer:

A family member got seriously ill. We spent most days at the hospital, and straight answers were hard to come by, so we leaned on AI tools to make sense of the records, notes, and lab results.

But you cannot paste a medical record into an AI chat. You have to strip the names, the ID numbers, the diagnoses first. And almost every tool we found either wanted to upload the whole file to a server, or "auto-redacted" by sending the document text to an online AI. That was the exact thing we were trying to avoid.

Most of this was happening on a phone, at a bedside. So I built the tool I needed: redaction that runs on the device, works on mobile, and never sends the file anywhere. That turned into KeptPDF, which is now a full PDF suite with over 20 tools, all local-first.

Which are the primary technologies used for building your product?

KeptPDF's answer:

The app is plain JavaScript with no front-end framework, which keeps it fast and keeps the code auditable.

PDF work happens in the browser using pdf.js for rendering and pdf-lib for writing. Text recognition uses Tesseract running as WebAssembly. Password and encryption handling uses a WebAssembly build of qpdf. It is a Progressive Web App, so it installs and works offline.

The thin server side is Node on Vercel, with Postgres for accounts, Stripe for billing, and Resend for email. None of those ever see a document.

Who are some of the biggest customers of your product?

KeptPDF's answer:

KeptPDF is early and independent, and we do not publish customer names. The product is privacy-first by design: we never see your documents, and we do not track who our users are or what they work on. Publishing a client list would sit badly next to that.

The user base today is mostly solo attorneys, small firms, accountants, and individuals handling their own records.

User comments

Share your experience with using Moon Reader and KeptPDF. For example, how are they different and which one is better?

Log in or Post with

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Moon Reader 4 mentions
KeptPDF 0 mentions
  • ElevenReader by ElevenLabs
    I have used Moon+ Reader [1] for years with the build-in Android TTS service. It works very well, is free, and sounds good enough for me. 1: https://moondownload.com/. - Source: Hacker News / over 1 year ago
  • Best Ebook (PDF/EPUB) reader app for Xperia?
    Been using moon reader for a long while. http://moondownload.com/. Source: almost 4 years ago
  • Standard Ebooks
    I've been using MoonReader (https://moondownload.com/) for years now and it's great, with an integration with the Gutenberg project. I also love the gestual shortcuts to control brightness, and the treasure thrive of options. The... - Source: Hacker News / about 4 years ago

View more

Tracking KeptPDF since Aug 2026.

Alternatives to Moon Reader and KeptPDF

When comparing Moon Reader and KeptPDF, you can also consider the following products.

Loading...