
PdfHighlights
Adobe Acrobat DC
Sumatra PDF
DocMadeEasy
PDF Assistant
PDF Annotator
PDFelement Pro
Export highlights from PDFs

PdfHighlights
Readwise
Zotero
Adobe Acrobat DC
Sumatra PDF
Able2Extract Professional
Foxit PhantomPDF
A local-first web tool to extract PDF highlights, notes, and comments directly into Obsidian, Notion, Markdown, CSV, and JSON. 100% offline and private.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | sumnotes.net | pdfannotations.com |
| Pricing | ||
| Platforms | — | |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Sumnotes yet.
What is PDFAnnotations? PDFAnnotations.com is a privacy-first, and browser-local web utility designed to extract highlights, comments, notes, and drawings from PDF files. It formats and exports this extracted data directly into structured notes for personal knowledge management (PKM) tools like...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Sumnotes yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Sumnotes tutorial/pdf extractor/highlights extractor
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Sumnotes and PDFAnnotations.
PDFAnnotations's answer:
PDFAnnotations is unique because it operates 100% locally in the user's browser using WebAssembly. Unlike traditional extractors that require uploading sensitive documents to cloud servers, PDFAnnotations parses files completely offline. It also features a visual, interactive Template Designer that allows active readers to format their extracted highlights into custom native Markdown, Obsidian Callouts, or Notion blocks with complete metadata preservation.
PDFAnnotations's answer:
A user should choose PDFAnnotations over competitors due to three key advantages: absolute data privacy, extreme cost efficiency, and deep note-taking integration. It requires no signup, no subscriptions, and no file uploads, serving as a robust free/freemium alternative to expensive cloud sync services like Readwise. Additionally, its "Sentence Mode" context preservation, multi-level comment reply extraction, and highly customizable formatting templates are specifically optimized for modern knowledge workers, which generic PDF readers do not support.
PDFAnnotations's answer:
The primary audience of PDFAnnotations consists of students, researchers, academics, legal professionals, and digital note-takers (PKM enthusiasts). It is designed specifically for active readers who frequently annotate academic papers, textbook PDFs, or legal contracts, and need a frictionless, secure way to move those highlighted concepts and reviewer comments into structured personal knowledge bases like Obsidian, Notion, or Logseq.
PDFAnnotations's answer:
PDFAnnotations was born out of frustration. As researchers and avid readers, we found ourselves spending hours manually copying and pasting highlighted quotes and comments from PDF textbooks and research papers into our note-taking apps. Existing cloud-based tools either required expensive monthly subscriptions or forced us to upload confidential PDFs to external servers, violating our data privacy requirements. We decided to build a lightweight, browser-local, WebAssembly-powered tool that solves this friction instantly with zero security risks.
PDFAnnotations's answer:
HTML5, TypeScript, WebAssembly (WASM) for lightning-fast client-side PDF parsing, and Tailwind CSS.
PDFAnnotations's answer:
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