Automate HTML to

PDF

Screenshot

PDF

Screenshot

Conversion

Yes, absolutely! You can use our free plan (up to 150 conversions per month) for as long as you want. There is no credit card required to sign up, and you can upgrade to a paid plan as you grow.

Additionally, we support sandbox conversions (see 8th question below for more information).

Our API service allows you to automate the conversion of HTML content into high-quality PDFs or screenshots.

Practical use cases include generating invoices, reports, tickets, certificates, marketing materials, QR code documents, and more.

This service can be integrated into larger workflows, supporting many automation tools to streamline your processes.

Privacy comes first. Our conversion API is built around a strict encryption policy, isolated rendering, and a stateless design so your content is not kept around after the job finishes.

• Your data is encrypted in-transit and at-rest, and each conversion runs in an isolated environment.
• Conversion data is removed from our systems when the job completes.
• Optional your cloud (presigned URL): we can upload the result directly into storage you control — see our docs for setup. We do not offer PolyDoc-hosted file storage as a product.

Together, this keeps the process predictable and limits exposure of your data after conversion.

No, absolutely not. Instead of sending a URL, you can provide the raw HTML content in order to convert private or local content.

For URL sources, we also support basic authentication and web-based login, as well as custom cookies and HTTP headers.

Additionally, you can make use of our template feature for your conversions.

The default maximum timeout for a conversion is 10 minutes (for a paid plan) respectively 30 seconds (for the free plan). The conversion process needs to be completed within this time frame.

An usual conversion takes only a few seconds, so this gives plenty of time for the conversion to complete. If you have specific needs, you can always reach out to us.

Each PDF or screenshot conversion counts usually as one.

For larger files, each 5MB chunk of the resulting file counts as one conversion. For example, a resulting 14MB file would count as 3 conversions.

No problem if you exceed your monthly limit from time to time. We have a friendly overage policy to have your back.

You can use up to 30% of your monthly limit as overage, for up to 4 months in any 12-month period.

Further, we will send you email notifications when you approach your limit.

Feel free to reach out if you have individual needs or other questions.

Yes, we do. Sandbox conversions are free and do not count towards your monthly limit. Sandbox mode is useful for integration testing and development purposes. PDFs or screenshots created in sandbox mode contain a watermark.

The monthly limit for sandbox conversions is 10 times your monthly limit for production conversions.

We support all standard paper sizes including A0 through A6, Letter, Legal, Tabloid, and Ledger.

You can also specify custom dimensions (width and height) for any page size you need. Landscape orientation, custom margins, and scale factors are all supported.

Yes! We support PDF/A-1b, 2b, and 3b compliance levels for long-term document archival, with optional VeraPDF verification to guarantee compliance.

We also support Factur-X and ZUGFeRD e-invoicing standards, allowing you to create hybrid PDF invoices with embedded structured XML data following EN 16931 profiles.

Our service is a standard REST API, so you can use any programming language that supports HTTP requests.

We provide documentation and examples for Node.js, Python, Ruby, Go, PHP, and Rust, but you can integrate with any language or platform.

You can create and manage HTML templates directly in the dashboard using a built-in Monaco code editor. Templates use the Liquid templating language, supporting variables, loops, and conditionals.

At conversion time, pass your dynamic data as JSON via the templateData parameter, and the template will be rendered with your data before conversion.

Yes! The dashboard provides a full-featured management interface, including:

• API key management for creating and managing your access tokens
• Template editor with syntax highlighting and live preview
• Playground for testing conversions with real-time PDF and screenshot preview
• Conversion analytics with charts, filtering, and CSV export
• Usage monitoring with quota tracking and overage visibility

Instead of receiving the conversion result synchronously, you can provide a webhook URL and we will deliver the result to your endpoint asynchronously.

Webhook payloads are signed with HMAC-SHA256 using your unique signature secret, so you can verify the authenticity of every delivery. You can configure the HTTP method, custom headers, timeout, and retries.

Use your cloud (presigned URL): you create a presigned PUT URL from your provider, pass it in the API request, and we upload the generated file there after conversion. PolyDoc does not run a hosted storage product for your outputs — this option is for teams who want files to land directly in buckets or accounts they already use, in line with our privacy-first design.

Guides are available for common S3-compatible providers, for example:

• AWS S3
• Google Cloud Storage
• Microsoft Azure Blob Storage
• Backblaze B2
• Wasabi
• Rabata.io