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Dev tools · alternatives · 2026

24 alternatives to Doppio

HTML to PDF/image API

Doppio is an API that converts HTML into PDFs or images and stores the results directly in users' own S3 buckets. Designed for developers, it functions as an alternative to Puppeteer with additional built-in helpers.… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Doppio launched in 2023; newer entries below may have overtaken it.

  1. 1PA

    Hi HN, Arek here. We’re super excited to officially launch PSPDFKit API [1]. PSPDFKit API is a collection of HTTP APIs that enable you to convert, generate, and edit documents without running any service on your infrastructure. What differentiates our API from others is that you can chain together multiple “actions” as part of a single API request. For example, you can convert, OCR, watermark, edit, and flatten a document — all in one call. Available actions [2]: - PDF Generator - PDF Converter - Image Converter - OCR - Watermark - Merge - Split - Duplicate - Delete - Flatten Our…

    2022 · its alternatives →

  2. 2
    PDFShift▲386

    Convert any HTML to PDF with a single POST request.

    2018 · pdfshift.io · its alternatives →

  3. 3

    🤖 A Node queue API for generating PDFs using headless Chrome. Comes with a CLI, S3 storage and webhooks for notifying subscribers about generated PDFs - esbenp/pdf-bot

    2017 · github.com · its alternatives →

  4. 4PJ

    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 →

  5. 5

    Loads a web page in headless Chrome using Puppeteer and prints it to PDF. The input is a JSON object and output is a PDF file.

    2017 · apify.com · its alternatives →

  6. 6

    Document generation API

    2022 · templateto.com · its alternatives →

  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 · its alternatives →

  8. 8

    The easiest way to programmatically populate any PDF

    2020 · useanvil.com · its alternatives →

  9. 9

    Generate images and PDFs with simple API

    2021 · apitemplate.io · its alternatives →

  10. 10

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

    2021 · useanvil.com · its alternatives →

  11. 11

    Fill out and generate PDFs with a simple API request. Design templates in our drag-and-drop editor, POST your JSON data, and download a finished PDF in seconds.

    2017 · formapi.io · its alternatives →

  12. 12

    500+ browser tools — your files never get uploaded

    Jun 2026 · brevio.pro · its alternatives →

  13. 13

    The API to convert anything into PDF

    2023 · its alternatives →

  14. 14

    Transform HTML to PDF, images, and videos instantly

    2024 · html2pdfapi.com · its alternatives →

  15. 15
    WebPDF▲103

    Simple PDF API & web toolkit

    2024 · its alternatives →

  16. 16PO

    Fill in PDF templates with the PDF Otter API. Use it to accept eSignatures in your app, repeatedly fill in common PDF forms, or build large scale apps around PDF documents.

    2017 · pdfotter.com · its alternatives →

  17. 17

    Create PDF documents from data and templates

    2024 · its alternatives →

  18. 18

    Create, build and run workflows

    2023 · its alternatives →

  19. 19AF
  20. 20PD

    PDFHippo is an API tool that lets you design a PDF in Excel, add functions and variables to parse dynamic values from the API to Excel and save it. While looking to integrate a PDF component into a no-code application my team and I were building, we went down the rabbit hole of PDF creation in the backend. I couldn't find a tool to edit/parse pdf in a simpler manner. Creating an in-house drag-drop widget for PDF was way too complex to print in PDF format. Tools like pdfkit , pdf-lib, and pdfjam were not compatible with the designs we wanted to create. Other API tools were too expensive…

    2023 · pdfhippo.com · its alternatives →

  21. 21

    Drop-in replacement for wkhtmltopdf using Docker, Electron and Go. Try now for free!

    2016 · athenapdf.com · its alternatives →

  22. 22
    PDFBolt▲16

    Hi HN, I'm Michał. I posted PDFBolt here about a year ago as a basic HTML to PDF API. Since then I've been rebuilding it around the thing that kept bugging me: every time a designer tweaked a layout, it meant a code change, a deploy, and a prayer that nothing broke in production. I wanted templates that live on the server and version themselves, so my API calls stay the same when the layout changes. Try the editor, no sign-up. Open a sample report, change the data, and download a real PDF: https://pdfbolt.com/try Templates use Handlebars. Your API call sends a templateId +…

    2025 · pdfbolt.com · its alternatives →

  23. 23

    HTML to PDF API — iframes, SPAs/React, complex JS

    Nov 2025 · its alternatives →

  24. 24

    One API for all your image & PDF conversions

    2024 · markupgo.com · its alternatives →

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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 →