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  1. Stackups
  2. Utilities
  3. API Tools
  4. Pdf Tools
  5. FormAPI vs OpenPDF

FormAPI vs OpenPDF

OverviewDecisionsComparisonAlternatives

Overview

DocSpring
DocSpring
Stacks3
Followers10
Votes0
OpenPDF
OpenPDF
Stacks3
Followers29
Votes0
GitHub Stars4.1K
Forks673

FormAPI vs OpenPDF: What are the differences?

Developers describe FormAPI as "An API for filling out and signing PDFs". FormAPI is a service that makes it easy to generate PDFs by posting data to an API. You can upload PDF templates and configure form fields in our web-based template editor. You can also generate PDFs by filling in an online form. On the other hand, OpenPDF is detailed as "A free Java library for creating and editing PDF files". OpenPDF is a free Java library for creating and editing PDF files with a LGPL and MPL open source license. OpenPDF is based on a fork of iText.

FormAPI and OpenPDF belong to "File Conversion" category of the tech stack.

OpenPDF is an open source tool with 1.12K GitHub stars and 156 GitHub forks. Here's a link to OpenPDF's open source repository on GitHub.

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Advice on DocSpring, OpenPDF

Cesar
Cesar

Jun 24, 2020

Needs advice

Users are uploading huge PDF files of more than 100MB on our platform. We are creating several tools to manage those files, but keeping the raw file will eat up space, as we are handling several of them. After upload, they will be mainly keep stored for future use.

I am looking for a tool to compress and optimize those PDFs, like a library or an external API that can process that for us.

Thanks

20.9k views20.9k
Comments

Detailed Comparison

DocSpring
DocSpring
OpenPDF
OpenPDF

DocSpring is a service that makes it easy to generate PDFs by posting data to an API. You can upload PDF templates and configure form fields in our web-based template editor. You can also generate PDFs by filling in an online form.

OpenPDF is a free Java library for creating and editing PDF files with a LGPL and MPL open source license. OpenPDF is based on a fork of iText.

API for filling out PDFs; PDF Template Editor; JSON Schema Validation; Online Forms
-
Statistics
GitHub Stars
-
GitHub Stars
4.1K
GitHub Forks
-
GitHub Forks
673
Stacks
3
Stacks
3
Followers
10
Followers
29
Votes
0
Votes
0
Integrations
Slack
Slack
Java
Java

What are some alternatives to DocSpring, OpenPDF?

AllInOneTools

AllInOneTools

AllInOneTools is a lightweight, developer-focused web platform that provides utilities for PDF processing, image optimization, text manipulation, SEO analysis, and Google AdSense workflows. It is designed for developers, indie hackers, and website owners who need fast, browser-based tools to support development, optimization, and monetization tasks. The platform emphasizes performance, privacy-friendly processing, and zero-installation workflows for modern web projects.

LedgeSpace — Automated Client Reporting for Agencies

LedgeSpace — Automated Client Reporting for Agencies

Connect GA4, Google Ads, and Meta Ads. Auto-generate white-labeled PDF reports and deliver them to clients on autopilot.

CaptureAPI

CaptureAPI

The only API that combines screenshots, PDF generation, and OG images in one service. Free tier: 200 screenshots/month. Under 2s response time. 99.9% uptime. Try it free.

WorkPPT: AI Presentations, Summarizer, Chat, PDF & More

WorkPPT: AI Presentations, Summarizer, Chat, PDF & More

Boost productivity with WorkPPT's AI-powered tools: Summarize content, generate slides, chat with AI, merge/split PDFs, add stamps/watermarks, and convert files. Fast, secure, and user-friendly!

HTML to PDF API for Developers

HTML to PDF API for Developers

Generate PDFs from HTML, CSS, and Markdown via REST API. Go-native engine under 100ms, Chromium for complex layouts. Free tier with 50 PDFs/month.

OrderSync

OrderSync

OrderSync’s AI parses purchase orders from EDI, PDF, email, CSV, and fax, validates them automatically, flags errors, and syncs clean data into your ERP. Built for distributors and stores.

Integrate Logic, Generate PDFs & Capture Screenshots with customJS

Integrate Logic, Generate PDFs & Capture Screenshots with customJS

The automation platform that lets you create and integrate custom JavaScript logic into Make.com, n8n, or as an HTTP API, and use it to integrate custom logic, generate PDFs, or capture screenshots in any software.

PDF.js

PDF.js

It is a Portable Document Format (PDF) viewer that is built with HTML5. It is community-driven and supported by Mozilla Labs. The goal is to create a general-purpose, web standards-based platform for parsing and rendering PDFs.

pdfmake

pdfmake

pdfmake, client/server side PDF printing in pure JavaScript.

Adobe Acrobat

Adobe Acrobat

Create, edit, and review PDFs. E-sign documents and collect signatures. Collaborate with your team. All in one app.

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