Software Alternatives & Startups
Register | Login

Quarto VS KeptPDF

Compare Quarto VS KeptPDF and see what are their differences

Quarto

Open-source scientific and technical publishing system built on Pandoc.

Quarto Landing page
Rating
0 reviews
Pricing
Open source
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.

KeptPDF Landing page
Rating
0 reviews
Pricing
Freemium $29 / Monthly (Pro, 1 user)
Alternatives Is it good?
Graded Prompts
A curated marketplace for AI prompts, each human-reviewed and live-tested before it goes on sale. Skip prompt trial-and-error: buy working prompts for Midjourney, ChatGPT, Claude, and 26+ more models. Free options, paid from $2.99, plus subscriptions 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, Quarto seems to be more popular. It has been mentioned 54 times since March 2021.

social mentions
54 vs 0
Configuration Management popularity
100% vs 0%
alternatives listed
174 vs 12

Base details

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

Quarto
KeptPDF
Website quarto.org keptpdf.com
Pricing
Open source
Freemium $29 / Monthly (Pro, 1 user) Official pricing
Company — Startup from the United States · 2026
Listed in
Configuration Management Text Editors Mobile Apps Blogging +1
PDF Tools Pdf Redaction OCR PDF Editor PDF Security & Privacy PDF Readers And Editors AI Tools +5

About Quarto and KeptPDF

In their own words, as submitted to SaaSHub.

Quarto
KeptPDF

No description of Quarto 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.

Quarto 5 features
KeptPDF 5 features
  • Versatility
    Quarto supports a wide variety of output formats such as HTML, PDF, Word, and PowerPoint, making it highly versatile for different publishing needs.
  • Extensibility
    Users can extend Quarto with their own custom templates and formats, allowing for a high degree of customization and integration with existing workflows.
  • Interactivity
    Supports interactive features such as embedded plots and widgets, which enhance the reader's experience by allowing them to engage with the content.
  • Multi-language Support
    Quarto allows users to write documents with R, Python, Julia, and JavaScript, providing flexibility to data scientists and analysts working across different programming environments.
  • Reproducibility
    Promotes reproducible research by supporting literate programming where code and its output are embedded within the document, ensuring results can be independently verified.

Possible disadvantages

  • Learning Curve
    New users may find the initial setup and learning phase challenging, especially if they are not familiar with markdown or programming concepts.
  • Limited Built-in Templates
    While users can create their own templates, the number of built-in templates is limited, potentially requiring more upfront work to design desired layouts.
  • Dependency Management
    Managing the environment and dependencies, especially with multiple programming languages, can be complex, potentially leading to version conflicts or execution issues.
  • Performance
    For very large documents or extensive interactive elements, performance can become an issue, leading to longer rendering times.
  • 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.

Quarto 3 videos + Add
KeptPDF 0 videos + Add

Quarto Review and tutorial

More videos

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
Quarto
KeptPDF
100% 100%
Configuration Management
0% 0%
0% 0%
PDF
100% 100%
100% 100%
Text Editors
0% 0%
0% 0%
PDF Readers And Editors
100% 100%

Questions & Answers

As answered by people managing Quarto 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 Quarto 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.

Quarto 54 mentions
KeptPDF 0 mentions
  • The Book of Frankie
    To write the book, I’m using Quarto on RStudio. I have never used Quarto before, so this was a great opportunity to give it a spin, and I need to say, it rules. - Source: dev.to / 2 days ago
  • Show HN: Write.md, a free, open-source, themeable Markdown editor for macOS
    I’m going to post this every time there’s a new markdown to pdf submission: quarto (https://quarto.org) is my go to tool. You can use it in R Studio, visual studio code or the cli. Uses pandoc under the hood, has support for latex and... - Source: Hacker News / about 1 month ago
  • How I turned a static site into a fully agentic AI course site using MCP and AI agents
    We chose Quarto. You write .qmd files, run quarto render, and get static HTML. We deploy that output to Cloudflare Pages. Pages load fast. URLs stay clean. Everything lives in Git. Learners can fork the repo and follow along. For a free,... - Source: dev.to / 3 months ago

View more

Tracking KeptPDF since Aug 2026.

Alternatives to Quarto and KeptPDF

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

Loading...