PNG to PDF API for Developers
PNG to PDF API built for teams that need reliable document automation at scale. Convert and process files with simple REST requests, predictable output quality, and production-grade uptime. Use it for invoice attachments, image upload normalization, and archive-ready PDF generation. Includes clear docs, SDK-ready endpoints, and quick testing in your browser so your team can move from prototype to production quickly without complex setup.
What this API does
Converts one or more PNG inputs into a single PDF document with consistent ordering and output settings.
Endpoint: POST /v1/convert/image/pdf
Common use cases
- Convert app screenshots into downloadable PDFs
- Create invoice PDFs from uploaded image files
- Normalize mixed PNG inputs into a single report
- Prepare archival-friendly files for storage
Request example
curl -X POST https://pdfapihub.com/api/v1/convert/image/pdf \
-H "CLIENT-API-KEY: your_api_key_here" \
-H "Content-Type: application/json" \
-d '{
"urls": ["https://example.com/a.png", "https://example.com/b.png"],
"output": "url"
}'Response example
{
"success": true,
"output_url": "https://cdn.pdfapihub.com/output/converted.pdf"
}Parameters
| Name | Type | Required | Description |
|---|---|---|---|
| url | urls | file | string | string[] | multipart | Yes | Input PNG source(s). |
| output | url | file | No | Return hosted URL or direct file download. |
Error handling
- Validate image format and file reachability before request.
- Handle 4xx errors for invalid payloads and 5xx for transient failures.
- Retry transient failures with exponential backoff.
Performance + limits
- Batch PNG inputs to reduce request overhead.
- Use URL output for async workflows and easier downstream processing.
- Keep file sizes optimized for faster conversion times.
Security and compliance
FAQ
Can I pass multiple PNG files?
Yes, you can submit multiple PNG sources and merge them into one PDF.
Can I receive a direct file instead of URL?
Yes, set output to file for download-oriented flows.
Is this suitable for production workflows?
Yes, the API is built for predictable outputs and integration-ready automation.