Dev tools · alternatives · 2026
24 alternatives to PDF Blocks API
Merge, password-protect, watermark PDF documents, and more
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. PDF Blocks API launched in 2021; newer entries below may have overtaken it.
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- 2PA
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 →
- 3
The easiest way to programmatically populate any PDF
2020 · its alternatives →
- 4
- 5
Add text, watermarks, and fill forms in pdfs with ease | API
2025 · prefillpdf.com · its alternatives →
- 6
- 7AA
2017 · formapi.io · its alternatives →
- 8
- 9
- 10
Automate Image, Video, PDF Watermark
Aug 2026 · apiwatermark.com · its alternatives →
- 11NW
2021 · github.com · its alternatives →
- 12
- 13
- 14
- 15
A flexible Web API and template editor for PDF generation
2020 · its alternatives →
- 16
- 17
Free & fast | no signup | nowatermark | privacy
Nov 2025 · pdf-inity.vercel.app · its alternatives →
- 18
- 19FA
Hi HN, Like everyone, I'm working on an product that uses LLMs to extract data from photos and documents. Part of the processing pipeline is extracting data from PDFs as raw text or a raster image. As part of our leadgen strategy, we've opened our REST API that lets you process pages of a PDF. The API is completely free to use anonymously, but is rate limited to 1 page per 30 seconds. Creating a free account removes this restriction. The two endpoints are: - https://extract.dev/api/pages/extract/raster - Rasterize a page of a PDF -…
Oct 2025 · its alternatives →
- 20HI
I’m Michał, and I’d like to share with you the journey I went through with my wife and how, thanks to her, we built our first SaaS, PDFBolt (https://pdfbolt.com). I’ve been a developer for over 10 years. In 2020, I decided to build a side project to learn all aspects of app development—deployment, authentication, payments, frontend, landing pages, etc. While looking for project ideas, I came across the Indie Hackers community, where I found a simple HTML to PDF API project. The creator mentioned a lot of interest in it and that it was generating revenue. I thought I’d build…
2025 · pdfbolt.com · its alternatives →
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- 22
Merge PDFs Online Fast - 100% free, no limits
2025 · pdfcombine.github.io · its alternatives →
- 23
PDFMint▲7PDF generation API with built-in open-tracking
Jul 2026 · pdfmintapi.com · its alternatives →
- 24OS
2015 · stackhut.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 →