Dev tools · alternatives · 2026
24 alternatives to PDF API Hub
Add text, watermarks, and fill forms in pdfs with ease | API
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1
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 →
- 2
- 3
The easiest way to programmatically populate any PDF
2020 · useanvil.com · its alternatives →
- 4
Anvil PDF API▲185Twilio for PDFs: esign, fill, generate PDFs with one API
2021 · useanvil.com · its alternatives →
- 5PA
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 →
- 6
- 7PJ
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 →
- 8
Merge, password-protect, watermark PDF documents, and more
2021 · pdfblocks.com · its alternatives →
- 9PO
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 →
- 10
Every API you need to automate document workflows
2024 · developers.altaflow.com · its alternatives →
- 11
- 12
🤖 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 →
- 13
- 14
Highlight & summarize PDFs effortlessly with powerful tool
2024 · glasp.co · its alternatives →
- 15
- 16
A flexible Web API and template editor for PDF generation
2020 · pdfgeneratorapi.com · its alternatives →
- 17AA
2013 · stamplin.com · its alternatives →
- 18
- 19
This is a simple free tools to automate watermarking image, video and pdf. Some free tools - https://apiwatermark.com/free-image-watermark - https://apiwatermark.com/free-video-watermark - https://apiwatermark.com/free-pdf-watermark Initially to help watermarking ecommerce products. Any feedback is appreciated
Aug 2026 · apiwatermark.com · its alternatives →
- 20
DocSpring▲12POST JSON; GET PDF - Fill, generate, and sign PDFs via API
2025 · docspring.com · its alternatives →
- 21FP
2017 · form.ac · its alternatives →
- 22TA
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 →
- 23
- 24AA
Simplest and cheapest REST API to generate PDF from HTML, Office Docs, and merge PDFs
2018 · api2pdf.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 →