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Alternatives

Products that do what Pdf.js Express – PDF annotation, e-signatures, and form filling does

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,…

  1. 1
    pdfme106

    Open source PDF library fully written in TypeScript

    2022

  2. 2

    Twilio for PDFs: esign, fill, generate PDFs with one API

    2021

  3. 3AN

    React-print-pdf is a new open-source library that simplifies PDF creation with React. You can design your PDFs like a website, integrate data from your database to your documents, and reuse community components and templates or build your own. Created by three friends who were frustrated by existing solutions and wanted to make PDF creation easier for everyone. Now it’s yours. What are your thoughts on it ?!

    2024 · github.com

  4. 4
    Fill84

    The smart way to fill, send, sign & store PDF's

    2019

  5. 5

    The easiest way to programmatically populate any PDF

    2020

  6. 6
    PDFMonkey164

    Automate your PDF generation, get the job done

    2023

  7. 7TA

    Hello HN! It kept surprising me how much of a hassle it is to generate a PDF with decent HTML5 rendering from my SaaS apps. I tried several free libs and APIs but ended up with botched rendering a lot of times. So I set out to simplify this chore by creating an AWS hosted HTML to PDF conversion API that's based on Chrome. This API will allow a dev to just send the HTML to our API and get a PDF in response without having to worry about running and managing Chrome somewhere in their infra. I just finished the first version of my landing page and hosted pdf generation API…

    2018

  8. 8

    Render React components to Sketch ⚛️💎

    2017

  9. 9

    The developer-friendly HTML to PDF API

    2020

  10. 10

    Open-source tool for digitally signing PDFs

    2022

  11. 11

    Design and generate pixel-perfect PDF documents in minutes

    2022

  12. 12
    Doppio155

    HTML to PDF/image API

    2023

  13. 13

    Production-ready PDFs for React, in code you own

    Jul 2026 · pdfxbuilder.com

  14. 14

    Enterprise-Level Document Signing Goes Open-Source

    2023

  15. 15
    SudoPdf21

    API for rendering PDFs using React & Tailwind

    Oct 2025

  16. 16

    An open-source email editor you can embed in your own app

    Apr 2026

  17. 17PA

    I banged this out over the weekend. It's really rough though. https://github.com/burtonator/pdf-annotation-exporter Basically I have it working with: https://mozilla.github.io/pdf.js/web/viewer.html Whereby I can paste the pos.js into the console and it can export PDF annotations with screenshots of the annotation. I intend on using this with Anki to read more complex books and take notes with it. Now I just need to wire it all together with chrome headless and PDF.js

    2018

  18. 18PG

    We saw that the existing solutions have a learning curve and restrictions. So we thought to assemble one that can make things easy. Let me know your thoughts on this.

    Oct 2025 · producthunt.com

  19. 19

    Annotate images and PDFs quickly in your browser

    Jul 2026 · freewww.com

  20. 20PT

    Hi HN, A friend and I hacked this together to turn PDFs, docs and raw text into an easy-to-fill online form. The hardest part was getting the prompts to work reliably. We're using PDF.js to parse the document, asking OpenAI to extract the questions and calling the Fillout API to create the form. Let me know what you think: https://fillout.com/ai-form-builder (free to use + no sign up needed)

    2023 · fillout.com

  21. 21

    HTML to PDF API — Go-native engine, under 100ms

    Mar 2026

  22. 22HT
  23. 23

    Annotate and sign PDFs privately in your browser

    Mar 2026

  24. 24PP

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