PDF Toolkit
Free tierGenerate, merge, split, and sign PDFs over HTTP.
About this API
A complete document pipeline as one API. Render HTML or URLs to pixel-accurate PDFs, merge and split files, compress, watermark, fill AcroForms, and apply digital signatures without installing a single native dependency.
Common use cases
Quickstart
Every Zephiel API uses the same base URL, the same key header, and the same error envelope.
curl -X GET "https://zephiel.com/api/v1/pdf-toolkit/html-to-pdf" \
-H "X-Zephiel-Key: $ZEPHIEL_API_KEY" \
-H "Accept: application/json"Example response
{
"success": true,
"file_url": "https://cdn.zephiel.com/f/9f3c1a20.pdf",
"pages": 4,
"bytes": 184320,
"expires_at": "2026-08-27T09:00:00Z"
}/v1/pdf-toolkit/html-to-pdfRender HTML or a URL to PDF/v1/pdf-toolkit/mergeCombine multiple PDFs into one/v1/pdf-toolkit/splitSplit by page ranges or bookmarks/v1/pdf-toolkit/signApply a digital signatureAll endpoints return JSON and accept the X-Zephiel-Key header. Rate limits are enforced per plan and reported in X-RateLimit-Remaining.
Plans can be changed or cancelled at any time. Overage is charged per 1,000 requests rather than hard-blocking your traffic.
Free
100 requests/mo
5 req/min
Free
- JSON output format — included
- HTTPS encryption — included
- API key authentication — included
- Standard endpoints — included
- Community support — included
- CSV output format — not included
- Email support — not included
- Usage analytics and alerts — not included
- 99.9% uptime SLA — not included
- Webhooks — not included
- Priority support — not included
- Custom rate limits — not included
- 99.99% uptime SLA — not included
- Dedicated success manager — not included
- SSO / SAML — not included
- Custom SLA, DPA, and BAA — not included
- Private deployment option — not included
- Volume pricing — not included
Starter
10,000 requests/mo
60 req/min
$19/month
- JSON output format — included
- HTTPS encryption — included
- API key authentication — included
- Standard endpoints — included
- Community support — included
- CSV output format — included
- Email support — included
- Usage analytics and alerts — included
- 99.9% uptime SLA — included
- Webhooks — not included
- Priority support — not included
- Custom rate limits — not included
- 99.99% uptime SLA — not included
- Dedicated success manager — not included
- SSO / SAML — not included
- Custom SLA, DPA, and BAA — not included
- Private deployment option — not included
- Volume pricing — not included
Most popular
Pro
250,000 requests/mo
600 req/min
$76/month
- JSON output format — included
- HTTPS encryption — included
- API key authentication — included
- Standard endpoints — included
- Community support — included
- CSV output format — included
- Email support — included
- Usage analytics and alerts — included
- 99.9% uptime SLA — included
- Webhooks — included
- Priority support — included
- Custom rate limits — included
- 99.99% uptime SLA — included
- Dedicated success manager — not included
- SSO / SAML — not included
- Custom SLA, DPA, and BAA — not included
- Private deployment option — not included
- Volume pricing — not included
Enterprise
Unlimited requests
Custom
$266/month
- JSON output format — included
- HTTPS encryption — included
- API key authentication — included
- Standard endpoints — included
- Community support — included
- CSV output format — included
- Email support — included
- Usage analytics and alerts — included
- 99.9% uptime SLA — included
- Webhooks — included
- Priority support — included
- Custom rate limits — included
- 99.99% uptime SLA — included
- Dedicated success manager — included
- SSO / SAML — included
- Custom SLA, DPA, and BAA — included
- Private deployment option — included
- Volume pricing — included
4.7
12 reviews
Rachel Kimani
Head of Integrations
Good coverage for merge
We checked PDF Toolkit against our own merge reference data before committing. Coverage was better than the incumbent we were paying four times as much for.
Chidi Nwosu
Head of Engineering
Documentation matched reality
Every sample in the PDF Toolkit docs ran unmodified. That sounds like a low bar until you have integrated something where it is not.
James O'Connor
Technical Director
Now handles contract assembly too
We adopted PDF Toolkit for invoice generation and ended up using it for contract assembly as well. Same key, no new contract, no second integration.
Aisha Suleiman
Digital Lead
Support answered properly
Asked Northwind Data about an edge case in PDF Toolkit and got an explanation from someone who had clearly read the code, not a link to the FAQ.
Anna Kowalski
Senior Developer
Quietly reliable
PDF Toolkit has not surprised us once in eight months of production traffic. That is the highest compliment I can pay a dependency.
Yusuf Abdullahi
Head of Engineering
One key made the difference
Adding PDF Toolkit took ten minutes because the credential already existed. The vendor onboarding we skipped would have taken longer than the integration.
Amara Okonkwo
Engineering Lead
Solved Invoice generation for us
We brought PDF Toolkit in for Invoice generation and it has not needed revisiting since. The response shape matched the documentation on the first call, which is rarer than it should be.
Marcus Adeyemi
Lead Developer
Predictable enough to plan around
PDF Toolkit takes about 640ms, which is fine for the work it does. What matters is that the number barely moves — we queue the call and our timeouts have not fired once.
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