HTML to PDF API for developers, $3.5K a month, self-reported in 2024: async conversion

An API for developers to generate PDFs from HTML, CSS, and JavaScript. Its $3.5K a month was founder-reported on the Indie Hackers product page (not independently verified), as of March 2024.

What it actually sells

HTML2PDF.app sells an HTML-to-PDF conversion API for developers integrating PDF generation. Its positioning is: “Most realistic, high-quality HTML to PDF conversion API service for developers!” The service describes itself as “A fast, developer-friendly API with everything you need for high-quality PDF generation.”

How it charges

The product's price could not be identified on the pages we read. Currency amounts appear on the pages, but none could be tied to the product's own pricing.

Where customers come from

The site presents a free browser-based HTML-to-PDF converter that works with a URL or raw HTML. It also provides an API playground that generates ready-to-use code and a WordPress plugin that converts pages or posts through a shortcode.

What stands out

The API supports Chromium-based rendering for modern HTML, CSS, and JavaScript. PDFs can be generated in the background and delivered to a callback URL, with controls for page size, orientation, margins, media styles, headers, footers, passwords, permissions, and AES encryption.

The site reports 1.7M+ conversions per month, 1.5K+ developers using the service, 1.8s average processing time, and 99.9% uptime reliability.

From the official site

A fast, developer-friendly API with everything you need for high-quality PDF generation.

Control page size, orientation, margins, media styles, headers, footers, and more.

Excerpts from the official website, fetched October 1, 2026.

Where it sits in the data

HTML2PDF.app's $3.5K a month is higher than 55% of the 6,604 projects with founder-reported monthly revenue in our dataset; the median across them is $2K. Snapshot: 2026-09-30. The dataset only covers founders who chose to publish their numbers, so it leans toward businesses that work; use it for scale, not as an average.

Currency

All figures are in US dollars as published. A rough yuan or euro conversion is not applied here because prices, taxes and acquisition costs differ by country.

Could you build something like this?

In my view, this needs real work. The buyer is a developer integrating document generation, and distribution can come from a browser converter, an API playground, code examples, documentation, and integrations such as the WordPress plugin.

The hard parts include rendering modern web content accurately, processing documents asynchronously, maintaining reliability, handling security and permissions, and supporting developers when rendering or delivery fails. A new entrant would also face competition in the HTML-to-PDF API category.

Verdict: Needs real work.

One thing to take from it

The site combines an API with an online converter, API playground, and WordPress plugin. It also publishes proof points covering conversions, developers, processing time, and uptime.

Sources

HTML2PDF.app official website, fetched October 1, 2026
HTML2PDF.app pricing page, fetched October 1, 2026
Indie Hackers product page: revenue founder-reported on the Indie Hackers product page (not independently verified), as of March 2024

Revenue, team and start-cost figures are what the founder reported at the interview date, not current figures and not a prediction of what you will earn. Product and pricing facts come from the business's own website as checked on 30 September 2026. Method & sources · Disclosure