Dev tools · alternatives · 2026
24 alternatives to PDF Otter – Fill in PDFs Online and API
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.
PDF Otter is an API and web tool that lets developers fill PDF templates and accept eSignatures programmatically. It includes a template editor for converting any PDF into a fillable form without manual coordinate… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. PDF Otter – Fill in PDFs Online and API launched in 2017; newer entries below may have overtaken it.
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The easiest way to programmatically populate any PDF
2020 · useanvil.com · its alternatives →
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Anvil PDF API▲185Twilio for PDFs: esign, fill, generate PDFs with one API
2021 · useanvil.com · its alternatives →
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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 →
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PDFShift▲386Convert any HTML to PDF with a single POST request.
2018 · pdfshift.io · its alternatives →
- 7
BreezePDF lets you edit, sign, merge, compress, redact, OCR, fill forms, extract tables, and use 30+ more PDF tools — all in the browser, no sign-up. Files never leave your computer. I built it because when people search Google for common PDF tasks, many of the tools they find upload documents to a server. I wanted an option that keeps files local instead. I posted an earlier version on HN last spring: https://news.ycombinator.com/item?id=43880962 At the time it only supported a small set of features. Over the last 10 months I rebuilt large parts of it and expanded it to…
2025 · breezepdf.com · its alternatives →
- 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 →
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🤖 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 →
- 11MF
2016 · createamemo.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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Best app for signing, editing pdf documents
2025 · apps.apple.com · its alternatives →
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- 18FP
2017 · form.ac · its alternatives →
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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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A flexible Web API and template editor for PDF generation
2020 · pdfgeneratorapi.com · its alternatives →
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DocSpring▲12POST JSON; GET PDF - Fill, generate, and sign PDFs via API
2025 · docspring.com · its alternatives →
- 23AF
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 →