Software Alternatives, Accelerators & Startups

AdBlock VS KeptPDF

Compare AdBlock VS KeptPDF and see what are their differences

AdBlock logo AdBlock

Ad blocker for Chrome, Safari and Opera on desktop and Safari for iOS devices.

KeptPDF logo KeptPDF

Redact, edit, OCR, and sign PDFs entirely in your browser. The file never leaves your device. Free, no account needed.
Visit Website
  • AdBlock Landing page
    Landing page //
    2022-03-26
  • KeptPDF Landing page
    Landing page //
    2026-08-22

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 a box over it. Every redacted file gets an audit certificate that anyone can verify.
  • OCR that makes scanned PDFs searchable, with on-device processing.
  • Sign, annotate, compare, organize, split, merge, compress, convert, watermark, Bates numbering, exhibit stamps, and more. About 25 tools in total.
  • A command line version runs the same redaction engine on your own servers for bulk work: scanning bureaus, litigation support teams, and records departments process thousands of PDFs in one pass.

Who it is for: law firms, accounting practices, clinics, and anyone who shares documents they cannot afford to leak.

The core tools are free with no sign-up. Works offline as an installable app.

AdBlock

Pricing URL
-
$ Details
-
Release Date
-
Startup details
Country
United States

KeptPDF

$ Details
freemium $29 / Monthly (Pro, 1 user)
Release Date
2026 May
Startup details
Country
United States
State
Tennessee
Founder(s)
John Whitworth

AdBlock features and specs

  • Improved Browsing Experience
    AdBlock removes intrusive ads, allowing web pages to load faster and users to enjoy a cleaner browsing experience.
  • Enhanced Privacy
    By blocking ads, AdBlock helps reduce tracking by ad networks, thereby enhancing the user's privacy online.
  • Reduced Data Usage
    Since ads often contain large images, videos, or animations, blocking them can significantly reduce data usage, which is beneficial for users with limited bandwidth.
  • Security
    AdBlock can protect users from malicious ads that might contain malware or phishing links.
  • Customization
    AdBlock offers customization options, allowing users to whitelist specific websites and control what types of ads to block.
  • Engaging Gameplay
    AdBlock: The Game offers fun and interactive gameplay that combines the theme of ad-blocking with entertaining mechanics, keeping players engaged.
  • Educational Experience
    The game provides an educational insight into how ad-blocking works and raises awareness of online advertising strategies, making it informative for players.
  • Free to Play
    Players can enjoy AdBlock: The Game for free, making it accessible to a wide audience without any initial financial commitment.
  • Supports Original AdBlock
    Playing the game supports the original AdBlock service, promoting their mission and possibly funding further developments.

Possible disadvantages of AdBlock

  • Hurts Content Creators
    Many websites rely on ad revenue to fund their content. By blocking ads, users may inadvertently reduce the income generated by these sites.
  • Potential Website Breakage
    Some websites may not function properly or fully when ads are blocked, leading to a degraded user experience.
  • Ethical Considerations
    Blocking ads raises ethical questions regarding fair compensation for free content and services provided by websites.
  • Circumvention by Publishers
    Some websites have started using anti-adblock measures, restricting access to their content if they detect the use of ad blockers, forcing users to disable the extension.
  • Resource Usage
    Running AdBlock as a browser extension can increase the consumption of system resources, potentially slowing down the browser.
  • Limited Audience
    The theme and premise of the game may appeal primarily to users already interested in digital advertising or ad-blocking, making its target audience niche.
  • In-Game Advertisements
    Despite being a game about ad-blocking, it might use in-game ads as part of the gameplay mechanics, which could be ironic or off-putting to some players.
  • Potential Over-Simplification
    The game might oversimplify the complexities of internet advertisements and ad-blocking, potentially leading to a misunderstanding of the topic.
  • Derivative Experience
    Players looking for novel or groundbreaking gameplay might find it derivative if the game relies heavily on traditional ad-blocking themes.

KeptPDF features and specs

  • 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.

Analysis of AdBlock

Overall verdict

  • AdBlock is generally considered a good and reliable choice for users looking to mitigate the annoyance and privacy concerns associated with online advertising. It is easy to install, widely supported across different browsers, and offers customizable options for allowing certain ads or whitelisting specific websites.

Why this product is good

  • AdBlock (getadblock.com) is effective for users who want to block intrusive advertisements, enhance browsing speed, and increase online privacy. It is designed to remove ads from websites, thus improving the overall user experience on the internet. Additionally, blocking ads can lead to faster loading times and reduced data consumption.

Recommended for

    AdBlock is recommended for individuals who frequently browse the internet and wish to have a cleaner, more streamlined viewing experience without ads. It is particularly useful for those concerned about online privacy and data usage, or for anyone who is frustrated with the distraction caused by excessive advertising on websites.

AdBlock videos

Dear AdBlock, Kiss My A$$!

KeptPDF videos

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

Add video

Category Popularity

0-100% (relative to AdBlock and KeptPDF)
Security & Privacy
97 97%
3% 3
PDF
0 0%
100% 100
Ad Blockers
100 100%
0% 0
PDF Readers And Editors
0 0%
100% 100

Questions & Answers

As answered by people managing AdBlock 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

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Reviews

These are some of the external sources and on-site user reviews we've used to compare AdBlock and KeptPDF

AdBlock Reviews

  1. Easy to use and makes browsing cleaner

    I've been using AdBlock for a while now, and I really like it. It blocks annoying pop-ups, video ads, making websites load faster and look cleaner. It’s easy to use and works seamlessly in the background.


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KeptPDF Reviews

We have no reviews of KeptPDF yet.
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Social recommendations and mentions

Based on our record, AdBlock seems to be more popular. It has been mentiond 24 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

AdBlock mentions (24)

  • Are there any good and free ad blocker??
    Https://getadblock.com/en/ This one works fine with me on Opera GX. You can go to your browser's web store, like the Chrome Web Store and download one. If you switch to a browser like Brave or Opera GX, you can have a built-in one, which is easier. Source: about 3 years ago
  • R.I.P soap2day
    Interesting, I usually don't get pop ups on soap2day or that site(only if I miss click on the play button or something similar sometimes). I use an ad blocker though so maybe thats why. I get WAY more when I use my iphone though. Source: about 3 years ago
  • Help!
    If I were you I would contact official steam support at the Steam Help Page, maybe they'll be able to help you, make sure to use an AD-Block or a VPN to stay safe out here on the internet. Wish you good luck. Source: about 3 years ago
  • 1337x saying I need a VPN?
    This issue just appeared today, I've never seen it before. I'm using NordVPN with kill switch enabled, and I already checked with https://www.iplocation.net/ and http://checkmyip.torrentprivacy.com/ to confirm I'm routing all traffic through the VPN. I tried getting a new IP from Nord, but it still didn't fix it. I'm using this ad block plugin in chrome https://getadblock.com/en/ , so I don't think this is an ad. Source: over 3 years ago
  • With all the talk of blocking the Tbell Pete and, what do you all do for other ads?
    I have an AdBlock extension for my Chrome browser on desktop: https://getadblock.com/en/. Source: almost 4 years ago
View more

KeptPDF mentions (0)

We have not tracked any mentions of KeptPDF yet. Tracking of KeptPDF recommendations started around Aug 2026.

What are some alternatives?

When comparing AdBlock and KeptPDF, you can also consider the following products

uBlock Origin - Popular and efficient blocker for Chromium, Chrome, Edge, Firefox, Opera, Safari, Thunderbird.

Smallpdf - PDF document management and conversion suite

Adblock Plus - AdBlock Plus is a browser extension for Firefox, Chrome, Opera, and several other popular browsers that prevents intrusive ads like pop-ups and malicious code from appearing on websites you visit.

iLovePDF - Premium online PDF tool set

AdGuard - Surf the Web Ad-Free and Safely. Shield up!

Sejda - Split, merge and other powerful PDF tools.