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What is SlimerJS?

SlimerJS is a free and open-source browser tailored for web development, allowing users to manipulate web pages through external JavaScript scripts. It offers a wide range of capabilities, such as opening web pages, clicking links, and modifying content, which proves beneficial for functional testing, automating interactions, monitoring network activity, capturing screenshots, and scraping online data. Unlike PhantomJS, SlimerJS operates using Gecko, Mozilla Firefox's rendering engine, rather than WebKit, and it supports both headless and non-headless operation modes. The APIs available in SlimerJS are somewhat akin to those in PhantomJS, though there are significant differences in their respective functionalities. Nevertheless, most scripts initially created for PhantomJS remain compatible with SlimerJS, making it easier for developers to transition between the two platforms. This flexibility ultimately improves the overall scripting experience for web developers, allowing them to choose the tools that best suit their needs. As a result, SlimerJS serves as a valuable asset in the web development toolkit.

What is PDFik?

PDFik generates the documents your systems produce every day — invoices, reports, statements, tickets — from URLs or HTML, through a reliable asynchronous API. Your application submits a job and gets on with its work; PDFik notifies it with a cryptographically signed callback when the PDF is ready. Costs stay predictable: plans meter exactly two things, rendered PDFs and generated gigabytes; every limit is published, and downloads are never billed. Documents up to 150 MB are supported on every tier, and generated files are deleted within 24 hours, which keeps data-retention reviews short. Teams can evaluate end to end at no cost: a free plan (100 PDFs and 0.5 GB monthly, no credit card required) plus a free test mode that exercises the full workflow without consuming quota. Paid plans start at $29/month; the service carries a 99.9% uptime SLA. Official SDKs for JavaScript/TypeScript, Python and Java, plus a command-line client.

Media

Media

Integrations Supported

JavaScript
Mozilla Firefox

Integrations Supported

API Availability

Has API

API Availability

Has API

Pricing Information

Free
Free Version

Pricing Information

$29/month
Free: 100 PDFs / 0.5 GB per month, no credit card required. Starter $29/mo: 5,000 PDFs / 10 GB. Pro $99/mo: 50,000 PDFs / 50 GB. Business $449/mo: 500,000 PDFs / 300 GB + $0.55/GB add-on. Annual billing saves ~20%. 99.9% uptime SLA.
Free Version

Supported Platforms

Windows
Mac
Linux

Supported Platforms

SaaS

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

SlimerJS

Company Location

United States

Company Website

slimerjs.org

Company Facts

Organization Name

PDFik

Date Founded

2026

Company Location

Poland

Company Website

pdfik.net

Categories and Features

Headless Browsers

Not specified

Categories and Features

PDF APIs

Not specified

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