CustomJS is a general automation platform. cloudlayer.io is a dedicated document generation API with templates, SDKs, and production features.
| Feature | CustomJS | cloudlayer.io |
|---|---|---|
| Rendering Engine | Chromium | Chromium |
| PDF Generation | ✓ | ✓ |
| Image Generation | ✓ | ✓ |
| Template System | ✕ | Nunjucks |
| Visual Template Editor | ✕ | ✓ |
| Purpose-Built PDF API | No (general tool) | Yes |
| Webhook Notifications | Via Make/n8n | Built-in |
| Cloud Storage (S3/GCS) | Via integrations | Built-in |
| CDN Asset Hosting | ✕ | ✓ |
| Multiple SDKs | ✕ | 8 languages |
| Documentation | Limited | Comprehensive |
CustomJS is a general JavaScript automation platform that happens to generate PDFs. It's not purpose-built for document generation.
CustomJS has no template editor or engine. You manage all HTML yourself. cloudlayer.io gives you Nunjucks templates with data merging.
CustomJS is primarily designed for Make.com and n8n integrations. cloudlayer.io has dedicated SDKs for 8 languages and comprehensive API documentation.
Create your cloudlayer.io account and get an API key in under a minute. No credit card required. Full API access from day one.
Bring your existing HTML templates or build new ones with the visual editor or Nunjucks. Upload fonts and assets to our CDN.
Swap the CustomJS endpoint with cloudlayer.io. Our REST API accepts HTML, template IDs, or URLs — most migrations take minutes.
Every feature in cloudlayer.io is designed for document generation — templates, rendering options, delivery, and storage.
Design reusable templates with loops, conditionals, and filters. Generate thousands of unique documents from JSON data.
Node.js, Python, PHP, Ruby, Go, Java, C#, and F#. Install from your package manager and start generating in minutes.
Full API access, visual template editor, PDF + image generation, webhooks, and cloud delivery. No credit card required — start your 30-day free trial.
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