Convert HTML
directly to PDF.

One lightweight API that turns web pages → pixel-perfect PDFs in seconds. Your first 50 pages each month are free.

A4 and Letter, landscape, custom margins, print backgrounds, and an optional delay for JS-heavy pages—when you need more than a plain HTML dump.

Get API Key Read Docs HTML 2 PDF Converter

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Why developers choose FileSlap

Built for developers who need reliable, fast, and secure PDF generation.

Fast

Render full webpages to PDF in seconds.

Secure

TLS-only endpoints; content is not kept for long-term access after conversion.

Pay-as-you-go

Usage-based pricing from $0.002 per page.

More control when you need it

Sensible defaults for a single-field call—optional knobs when your template is picky.

Standard page sizes
Paper formats such as A4 and Letter (Playwright-supported names).
Portrait & landscape
Flip orientation when your layout needs a wider canvas.
Margin control
Optional per-side margins as numbers or CSS lengths (e.g. 12 or "0.5in").
Backgrounds & print CSS
Background colors and images are included using print-style rendering.
JS & delayed capture
Optional delay after load so client-rendered content can settle before PDF.

Who Uses HTML-to-PDF Conversion?

From small businesses to enterprise applications, developers use FileSlap to automate document generation and create professional PDFs from web content. Here's how different industries benefit:

E-commerce & Retail

Generate invoices, receipts, and order confirmations automatically from your web application.

Order confirmations

Shipping labels

Product catalogs

Customer invoices

Business & Finance

Create professional reports, statements, and financial documents with consistent formatting.

Financial reports

Bank statements

Tax documents

Business proposals

Education & Training

Convert course materials, certificates, and educational content into shareable PDFs.

Course certificates

Training materials

Student reports

Educational handouts

Healthcare & Legal

Generate patient records, legal documents, and compliance reports with perfect formatting.

Medical reports

Legal contracts

Patient records

Compliance documents

Real Estate & Property

Create property listings, contracts, and documentation for real estate transactions.

Property listings

Rental agreements

Inspection reports

Closing documents

Marketing & Sales

Convert web content into professional marketing materials and sales collateral.

Sales proposals

Marketing brochures

Case studies

Product sheets

Try It Now

Test the API right now. Paste HTML below; expand advanced options to try layout and timing fields the API accepts.

Daily Demo:3/3 conversions remaining

Need an example? Try one of these:

Advanced options

formatlandscapemarginTopmarginRightmarginBottommarginLeftdelayMs (0–10000)filename (optional, .pdf added server-side)

Copy-paste examples

curl -X POST https://api.fileslap.com/api/convert \
  -H "Content-Type: application/json" \
  -H "X-API-KEY: YOUR_API_KEY" \
  -d &apos;{"html": "<h1>Hello World</h1>"}&apos; \
  --output hello.pdf

Simple, predictable pricing

Start free, scale as you grow. No hidden fees, no surprises.

Free

$0/month

• 50 pages / mo
• Up to 5 conversions per day
• No credit card required

Get Free API Key

Starter

$9/month

• 2,000 pages / mo
• Overage $0.002 / page

Start Free Trial

Pro

$29/month

• 12,000 pages / mo
• Overage $0.002 / page

Start Free Trial

Need higher volume? Contact us.

Frequently Asked Questions

What is FileSlap?

FileSlap is a fast, secure API for converting HTML to PDF. It is designed for developers who need reliable, scalable PDF generation in their apps.

How many free conversions do I get?

You get 50 free pages per month with the Free plan, with a limit of 5 conversions per day. No credit card required.

Is my HTML or PDF data stored?

We do not keep your HTML or PDFs for long-term access. Generated PDFs exist only briefly for delivery and are removed automatically. See Security & Privacy.