Dev tools · alternatives · 2026
24 alternatives to Anvil PDF API
Twilio for PDFs: esign, fill, generate PDFs with one API
Anvil PDF API provides developers with REST endpoints to fill, generate, and electronically sign PDFs programmatically. It simplifies PDF handling tasks that are traditionally complex in web applications. The tool is… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Anvil PDF API launched in 2021; newer entries below may have overtaken it.
- 1
The easiest way to programmatically populate any PDF
2020 · useanvil.com · its alternatives →
- 2
No-code PDF automation for all, webform meets PDF & e-sign
2021 · useanvil.com · its alternatives →
- 3PO
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 →
- 4
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 →
- 5
Draft brand new documents to use over API
2025 · useanvil.com · its alternatives →
- 6PJ
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 →
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The fastest way to build software for documents
2024 · useanvil.com · its alternatives →
- 9
PDFShift▲386Convert any HTML to PDF with a single POST request.
2018 · pdfshift.io · its alternatives →
- 10
- 11
🤖 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 →
- 12PA
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 →
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open-pdf-sign▲105Open-source tool for digitally signing PDFs
2022 · openpdfsign.org · its alternatives →
- 17
- 18AA
2013 · stamplin.com · its alternatives →
- 19
A flexible Web API and template editor for PDF generation
2020 · pdfgeneratorapi.com · its alternatives →
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- 21TA
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 →
- 22
Enable your website visitors to fill, annotate, merge and edit PDF files without leaving your website. Use the iframe, Javascript script or React component.
2023 · simplepdf.github.io · its alternatives →
- 23
Add text, watermarks, and fill forms in pdfs with ease | API
2025 · prefillpdf.com · its alternatives →
- 24
PDFBolt▲16Hi 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 →
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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 →