Dev tools · alternatives · 2026

24 alternatives to Annotationeer

annotation, pdf.js, pdf, annotate

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Annotationeer launched in 2016; newer entries below may have overtaken it.

1. 1
   PDF Viewer▲161

   Read, review, and annotate PDFs with ease

   2016 · pdfviewer.io · its alternatives →

2. 2
   Notable PDF▲83

   Cloud-based PDF Viewer and Annotation

   2015 · kamiapp.com · its alternatives →

3. 3PJ
   Pdf.js Express – PDF annotation, e-signatures, and form filling▲334

   Hi HN, Nick here. We're super excited to officially launch PDF.js Express [1]. PDF.js Express wraps a modern React UI around the PDF.js rendering engine to enable PDF annotation, form filling, and signing inside your web app. We've also made some improvements to PDF.js text search, and taken a different approach to how the viewer uses the PDF.js rendering API, resulting in sharp graphics at any zoom magnification [2]. Based on our research, more than 70% of those who try to implement these features on top of PDF.js find it too difficult or time-intensive [3]. For those who are successful,…

   2020 · its alternatives →

4. 4
   Annotationeer▲2

   Annotate PDF documents using PDF.JS Viewer.

   2022 · youtube.com · its alternatives →

5. 5
   Annotate PDFs in Markdown▲39

   the essence of your research

   2022 · keypoints.app · its alternatives →

6. 6MF
   My first web app – PDF memo creator▲297

   2016 · createamemo.com · its alternatives →

7. 7
   Highlight & Summarize: PDF Companion▲129

   Highlight & summarize PDFs effortlessly with powerful tool

   2024 · glasp.co · its alternatives →

8. 8
   Annotable 2▲219

   Ultimate image annotation & markup tool

   2017 · moke.com · its alternatives →

9. 9
   Instacap▲127

   Async annotation & visual feedback

   2022 · chromewebstore.google.com · its alternatives →

10. 10
    Sumnotes▲131

    Export highlights from PDFs

    2016 · sumnotes.net · its alternatives →

11. 11
    LINER for Chrome▲188

    Highlight everything! From Wikipedia to PDF files

    2016 · its alternatives →

12. 12
    Annotate▲106

    Powering AI, one data point at a time

    2023 · annotate.my.canva.site · its alternatives →

13. 13
    Annotary▲3

    Save and annotate web pages, take notes, and shares

    2016 · joleerestaurant.com · its alternatives →

14. 14
    AgentEcho▲89

    Annotate any webpage UI and export feedback as Markdown

    Jan 2026 · github.com · its alternatives →

15. 15
    PDF Annotator by Good Annotations▲105

    Draw on your pdf online

    2020 · goodannotations.com · its alternatives →

16. 16
    PDF Markup Cloud▲1

    PDF & Web Annotator for Professionals

    2016 · apps.apple.com · its alternatives →

17. 17
    PDF Coach▲110

    Refine your thoughts and ideas with the help of AI

    2023 · its alternatives →

18. 18
    Reportly▲96

    PDF designer for Notion, Airtable & Coda

    2022 · its alternatives →

19. 19
    Annopad▲64

    Annotate and bookmark the Internet

    2016 · chromewebstore.google.com · its alternatives →

20. 20
    Pdf.js-based real-time collaborative viewer for Chrome▲61

    2014 · chrome.google.com · its alternatives →

21. 21
    Web Highlighter▲66

    Annotate and discuss web pages in real time.

    2022 · webhighlighter.com · its alternatives →

22. 22
    Annotary - Highlight Web Pages, Share Your Notes▲15

    OLE777 Sebagai penyedia rujukan digital untuk mengenal beberapa macam genre game dan entertaiment online. dengan blog konten yang ringan dan sangat informatif sehingga mudah di pahami untuk para pemain slot gacor yang mengejar maxwin

    2012 · annotary.com · its alternatives →

23. 23MF
    My first indie project - Annotate▲10

    2018 · play.google.com · its alternatives →

24. 24
    Web Annotation▲7

    2020 · kontxt.io · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →