Alternatives

Products that do what Fast PDF API does

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

1. 1PA
   PDF API – Generate, convert, and modify PDF documents▲204

   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

2. 2
   liblab▲446

   Generate better SDKs for your API

   2024

3. 3
   API Template▲118

   Generate images and PDFs with simple API

   2021

4. 4
   PDF merge API▲98

   Create PDF documents from data and templates

   2024

5. 5
   PDFShift▲391

   Convert any HTML to PDF with a single POST request.

   2018

6. 6
   PDF Generator API▲15

   Creating PDF files made easy

   2024

7. 7AA
   An API for filling out PDF forms▲209

   2017 · formapi.io

8. 8PB
   Pdf-Bot, an API/CLI for Generating PDFs Using Headless Chrome▲235

   2017 · github.com

9. 9
   Anvil PDF API▲185

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

   2021

10. 10
    Anvil PDF Filling API▲205

    The easiest way to programmatically populate any PDF

    2020

11. 11
    PDF Charts▲121

    Charts for busy developers

    2024

12. 12
    pdfme▲106

    Open source PDF library fully written in TypeScript

    2022

13. 13TA
    ThePDFApi, a Chrome Based PDF Generation API Hosted on AWS▲41

    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

14. 14
    Doppio▲155

    HTML to PDF/image API

    2023

15. 15
    TemplateTo▲125

    Document generation API

    2022

16. 16
    Docstron▲7

    The PDF Generation API for Developers

    Nov 2025 · docstron.com

17. 17
    WebPDF▲103

    Simple PDF API & web toolkit

    2024

18. 18
    PDFBlade▲87

    The developer-friendly HTML to PDF API

    2020

19. 19
    DocSpring▲12

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

    2025

20. 20AA
    Api2Pdf, an API for Converting HTML, URLs, and Office Docs to PDF▲9

    2018 · api2pdf.com

21. 21
    PlutoPDF▲110

    A URL to PDF converter wrapped behind a simple API.

    2021

22. 22OP
    Ocrbase – pdf → .md/.json document OCR and structured extraction API▲99

    Jan 2026 · github.com

23. 23
    PDF Generator▲9

    Stop building PDF code. Generate PDFs with 3 lines of code.

    2025

24. 24
    Docuest▲18

    API-based PDF document generator

    2025

Ranked by how close each launch is in meaning, then by votes. Refine with your own description →