All Endpoints & Actions
Browse every available endpoint and action supported by H2I, including image processing, PDF operations, HTML rendering, and tools. This page provides a complete overview of what you can do with each endpoint before integrating or exploring further.
H2I Endpoint Capabilities
The H2I endpoint converts HTML markup into visual outputs using predictable rendering rules, enabling developers to generate images or PDFs from dynamic content reliably.
HTML to Image
Renders HTML markup into a raster image output using controlled viewport sizing and layout calculation, producing consistent visual results for server-side image generation.
HTML to PDF
Renders HTML markup into a paginated PDF output using controlled viewport sizing and layout calculation, producing consistent document-ready results for server-side PDF generation.
Image Endpoint Capabilities
The Image endpoint provides a complete set of production-ready image processing actions that can be used individually or combined to build flexible transformation workflows.
compress
Reduces image file size using controlled compression techniques while preserving visual quality for faster delivery and reduced bandwidth usage.
resize
Adjusts image dimensions using width and height parameters with optional aspect-ratio preservation, allowing consistent sizing for responsive layouts and standardized media outputs.
format
Converts images between supported formats to improve performance, compatibility, or output consistency across different platforms and devices.
enhance
Improves visual appearance by adjusting brightness, contrast, saturation, sharpness, blur, and grayscale settings to refine image quality and presentation.
watermark
Applies text or image-based watermarks to images with configurable placement and opacity for branding and content protection.
crop
Extracts a specific region of an image using pixel-based coordinates and dimensions, enabling precise framing and subject-focused image preparation.
background
Applies a solid or blurred background behind images to achieve consistent framing without modifying the original image content.
padding
Adds internal spacing around images using a background color or transparency to achieve uniform dimensions without altering the original content.
frame
Wraps images with borders or rounded corners to create visually consistent framed outputs suitable for previews and layouts.
transform
Rotates or flips images horizontally or vertically to correct orientation issues and normalize visual output across different sources.
Exports one or more processed images as a single or multi-page PDF file intended for image packaging workflow.
metadata
Removes or preserves embedded image metadata including EXIF and orientation flags without altering pixel data or appearance no.
multitask
Applies multiple image transformations in a single request by combining actions such as resize, compress, watermark, and format into one optimized workflow.
PDF Endpoint Capabilities
The PDF endpoint provides a set of production-ready document operations designed for automation, document workflows, and backend processing.
merge
Combines multiple PDF files into a single document while preserving page order, structure, and layout for unified document delivery.
compress
Reduces the file size of PDF documents using safe compression techniques that preserve page structure, readability, and document integrity.
split
Splits a PDF into separate files by page range, enabling flexible document segmentation for storage, processing, or delivery needs.
extract
Extracts selected pages from a PDF document into a new file, enabling page-level reuse, redistribution, or focused document workflows.
to-images
Converts PDF pages into image files, enabling visual previews, thumbnails, or downstream image-based processing workflows.
watermark
Applies text or image watermarks to PDF pages with controlled placement and repetition, supporting branding and document ownership needs.
delete-pages
Removes selected pages from a PDF document, allowing precise document trimming without modifying remaining content.
reorder
Changes the order of pages within a PDF document, allowing logical restructuring without altering page content or formatting.
rotate
Rotates PDF pages by fixed angles to correct orientation issues and normalize document presentation.
encrypt
Applies password-based encryption to PDF documents to restrict access and protect sensitive content during storage or delivery.
decrypt
Removes password protection from encrypted PDFs when permitted, enabling downstream processing and document access.
flatten
Flattens interactive PDF elements into static content, ensuring consistent rendering and preventing form or annotation modification.
extract-images
Extracts embedded images from PDF documents while preserving original resolution and format, enabling asset reuse or downstream processing.
metadata
Extracts PDF metadata such as author, creator, and creation information and returns it as structured data, without modifying the document content.
Tools Endpoint Capabilities
The Tools endpoint provides image analysis and utility tools that return structured results (not transformed image files). Use single to run exactly one tool, or multitask to run multiple tools per image in one request.
metadata
Returns structured metadata for each image and can optionally include raw EXIF payload when includeRawExif='true' is provided.
dimensions
Returns image dimension properties in a structured format, enabling validation rules and consistent sizing logic in automated workflows.
quality
Estimates quality signals using a configurable sampling size (qualitySample) to support automated checks and consistent media intake.
efficiency
Estimates delivery efficiency using optional target parameters (efficiencyFormat, efficiencyQuality) to guide optimization decisions.
colors
Extracts color information and supports palette sizing controls (paletteSize) for consistent palette reporting across images.
palette
Returns a controlled-size palette representation using paletteSize clamping rules to keep results stable and predictable.
detect-format
Detects the input image format to support validation, conditional logic, and safe automation in upload pipelines.
orientation
Reports orientation-related signals so systems can normalize display logic without relying on inconsistent client-side handling.
similarity
Computes similarity signals between images and supports batch modes (pairs/tofirst) with a threshold for classification control.
hash
Generates hashes for deduplication and integrity workflows, supporting phash plus cryptographic options (md5, sha1, sha256).
transparency
Analyzes alpha/transparency behavior using a sampling control (transparencySample) to support correct rendering decisions downstream.
multitask
Runs multiple tools on each uploaded image in a single request, returning structured per-image results while respecting all platform limits and constraints.
Start Building with H2I
Explore the APIs, review supported actions, and integrate reliable media processing into your applications today.