Dev tools · alternatives · 2026
24 alternatives to PDF Filler
This is a REST API to handle the form document data
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. PDF Filler launched in 2019; newer entries below may have overtaken it.
- 1AA
2017 · formapi.io · its alternatives →
- 2
The easiest way to programmatically populate any PDF
2020 · its alternatives →
- 3
- 4
- 5
- 6PA
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 →
- 7
- 8PJ
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 →
- 9
- 10DC
2012 · docverter.com · its alternatives →
- 11
- 12
- 13
Add text, watermarks, and fill forms in pdfs with ease | API
2025 · prefillpdf.com · its alternatives →
- 14
- 15
- 16
DocSpring▲12POST JSON; GET PDF - Fill, generate, and sign PDFs via API
2025 · docspring.com · its alternatives →
- 17
A .NET Core API that fills PDF. Also Unit & Integration Test
2019 · 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 →
- 20DC
2023 · docconverter.app · its alternatives →
- 21
Automated PDF form completion from any data source
2025 · docufill.ai · its alternatives →
- 22
- 23PT
Hi HN, A friend and I hacked this together to turn PDFs, docs and raw text into an easy-to-fill online form. The hardest part was getting the prompts to work reliably. We're using PDF.js to parse the document, asking OpenAI to extract the questions and calling the Fillout API to create the form. Let me know what you think: https://fillout.com/ai-form-builder (free to use + no sign up needed)
2023 · fillout.com · its alternatives →
- 24AF
2022 · doqs.dev · 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 →