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Dev tools · alternatives · 2026

24 alternatives to PDF merge API

Create PDF documents from data and templates

PDF merge API is a developer tool that generates PDF documents from customized templates and JSON data. It includes a visual editor for template management with real-time PDF previews, allowing developers to create… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. PDF merge API launched in 2024; 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

    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 →

  3. 3
    FormAPI▲230

    Stripe for PDFs

    2017 · docspring.com · its alternatives →

  4. 4

    A flexible Web API and template editor for PDF generation

    2020 · pdfgeneratorapi.com · its alternatives →

  5. 5

    The easiest way to programmatically populate any PDF

    2020 · useanvil.com · its alternatives →

  6. 6

    Generate images and PDFs with simple API

    2021 · apitemplate.io · its alternatives →

  7. 7

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

    2021 · useanvil.com · its alternatives →

  8. 8

    Document generation API

    2022 · templateto.com · its alternatives →

  9. 9

    Creating PDF files made easy

    2024 · its alternatives →

  10. 10

    Combine and merge multiple PDFs into one PDF for free

    2023 · onepdf.online · its alternatives →

  11. 11
    Pdfbix▲59

    Scalable REST API to generate PDF

    2021 · its alternatives →

  12. 12
    WebPDF▲103

    Simple PDF API & web toolkit

    2024 · its alternatives →

  13. 13PO

    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 →

  14. 14

    PDF API. Generate & Transform PDFs. Multi-language SDKs.

    2023 · fastpdfservice.com · its alternatives →

  15. 15

    Combine PDFs. Easy. Free. Secure.

    2024 · maxai.me · its alternatives →

  16. 16

    Create, edit and generate professional documents from your data. A hosted document automation platform with an embeddable visual template editor and PDF generation API.

    2018 · pdfgeneratorapi.com · its alternatives →

  17. 17AA

    Simplest and cheapest REST API to generate PDF from HTML, Office Docs, and merge PDFs

    2018 · api2pdf.com · its alternatives →

  18. 18AA
  19. 19

    The PDF Generation API for Developers

    Nov 2025 · docstron.com · its alternatives →

  20. 20

    Extract JSON data from PDFs with a developer-friendly API

    Jan 2026 · pdf-extractor.com · its alternatives →

  21. 21

    Parse PDF to Json with AI and BYO-JSON-Schema

    2025 · pdftojson.dev · 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

    POST JSON; GET PDF - Fill, generate, and sign PDFs via API

    2025 · docspring.com · its alternatives →

  24. 24AF

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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 →