# Acrewity > Acrewity is a utility API platform: 22 services for document generation (HTML to PDF, PDF merge/extract), data conversion (Excel/JSON, Markdown/HTML), QR codes and barcodes, web content extraction (URL to Markdown), text tools (diff, regex, JSON validation), email, and more — all behind one API key. Every call costs 1 credit; the free tier includes 100 credits per month. Also available as a verified n8n community node: @acrewity/n8n-nodes-acrewity. All services are called via POST https://www.acrewity.com/api/services/execute with an Authorization: Bearer header and a JSON body of {"service", "operation", "params"}. ## Docs - [Content Automation](https://www.acrewity.com/docs/examples-content-automation.md): Web scraping, content extraction, and sitemap generation examples with practical code samples. - [Services Overview](https://www.acrewity.com/docs/overview.md): Complete overview of all 22 Acrewity API services including email, content processing, data utilities, and PDF operations. - [Document Processing](https://www.acrewity.com/docs/examples-document-processing.md): PDF generation, extraction, merging, and conversion examples with working code. - [Data Transformation](https://www.acrewity.com/docs/examples-data-transformation.md): Excel/JSON conversion, schema validation, and format conversion examples. - [Visual Content Generation](https://www.acrewity.com/docs/examples-visual-content.md): QR code, barcode, and image conversion examples with practical use cases. - [Utilities & Helpers](https://www.acrewity.com/docs/examples-utilities.md): Regex matching, text diff, timezone conversion, UUID generation, and more utility examples. - [Email Automation](https://www.acrewity.com/docs/examples-email-automation.md): Send and receive emails via SMTP/IMAP/POP3 with practical workflow examples. - [Acrewity API Reference](https://www.acrewity.com/docs/api-reference.md): Complete API documentation for Acrewity's API platform including authentication, endpoints, and all 22 production services. - [Email Access Service](https://www.acrewity.com/docs/email-access.md): Send and receive emails with SMTP/IMAP support, attachments, and HTML formatting. Includes code examples and use cases. - [Acrewity Integration Guide](https://www.acrewity.com/docs/integrations-overview.md): Step-by-step integration guides for n8n, Zapier, Make.com, and custom applications with code examples. - [URL to Markdown Service](https://www.acrewity.com/docs/url-to-markdown.md): Convert any web page to clean Markdown format. Supports JavaScript rendering for dynamic sites. - [UUID Generator Service](https://www.acrewity.com/docs/uuid-generator.md): Generate UUIDs in multiple versions (v1, v4, v5). Supports bulk generation and custom namespaces. - [Regex Matcher Service](https://www.acrewity.com/docs/regex-matcher.md): Advanced regex pattern matching for text extraction, validation, and processing. Supports capture groups and multiple flags. - [Text Diff Service](https://www.acrewity.com/docs/text-diff.md): Compare text documents with line-by-line diff analysis. Multiple output formats for code review and version tracking. - [Timezone Converter Service](https://www.acrewity.com/docs/timezone-converter.md): Convert times between timezones with automatic DST handling. Supports all IANA timezones and multiple formats. - [Markdown Table Generator Service](https://www.acrewity.com/docs/markdown-table-generator.md): Generate formatted Markdown tables from data with custom alignment and formatting. Perfect for documentation. - [QR Code Generator Service](https://www.acrewity.com/docs/qr-code-generator.md): Generate QR codes for URLs, vCards, WiFi, and more. Multiple formats with customizable size and colors. - [JSON Schema Validator Service](https://www.acrewity.com/docs/json-schema-validator.md): Validate JSON against schemas with detailed error reporting. Supports JSON Schema Draft 7 and custom rules. - [HTML to PDF Service](https://www.acrewity.com/docs/html-to-pdf.md): Convert HTML to PDF with CSS support, custom headers/footers, and multiple page formats. Perfect for invoices and reports. - [Image Converter Service](https://www.acrewity.com/docs/image-converter.md): Convert images between formats (JPG, PNG, WebP) with quality control, resizing, and optimization options. - [Excel to JSON Service](https://www.acrewity.com/docs/excel-to-json.md): Convert Excel spreadsheets to JSON with intelligent table detection, multiple sheet support, and data type inference. - [HTML to Markdown Service](https://www.acrewity.com/docs/html-to-markdown.md): Convert HTML content to clean Markdown with table preservation, code block detection, and image extraction. - [JSON to Excel Service](https://www.acrewity.com/docs/json-to-excel.md): Convert JSON data to professional Excel spreadsheets with multiple sheets, titles, and metadata. 1 credit per operation. - [URL Encoder/Decoder Service](https://www.acrewity.com/docs/url-encoder-decoder.md): Encode and decode URLs safely with support for full URLs, components, and query strings. Essential for web development. - [Markdown to HTML Service](https://www.acrewity.com/docs/markdown-to-html.md): Convert Markdown to HTML with GitHub Flavored Markdown support, syntax highlighting, and customizable styling. - [PDF Merge Service](https://www.acrewity.com/docs/pdf-merge.md): Merge multiple PDFs into one document with custom page order and metadata. Perfect for document consolidation. - [PDF to HTML Service](https://www.acrewity.com/docs/pdf-to-html.md): Convert PDF documents to HTML with table detection, structure preservation, and metadata extraction. - [PDF Extract Page Service](https://www.acrewity.com/docs/pdf-extract-page.md): Extract specific pages from PDFs with range selection and batch support. Perfect for document splitting. - [PDF to Markdown Service](https://www.acrewity.com/docs/pdf-to-markdown.md): Convert PDF documents to Markdown with intelligent table detection, heading recognition, and metadata extraction. - [Barcode Generator](https://www.acrewity.com/docs/barcode-generator.md): Generate 1D barcodes (Code128, EAN-13, EAN-8, UPC-A, Code39, ITF-14, Codabar) via API with customizable dimensions and colors. - [Sitemap Generator](https://www.acrewity.com/docs/sitemap-generator.md): Extract links from web pages and generate XML sitemaps via API. Perfect for SEO and website auditing. ## API - [OpenAPI specification](https://www.acrewity.com/openapi.json) - [Service catalog (JSON)](https://www.acrewity.com/api/services/list) - [AI configuration](https://www.acrewity.com/ai-config) ## Optional - [Complete documentation in a single file](https://www.acrewity.com/llms-full.txt) - [n8n community node](https://www.npmjs.com/package/@acrewity/n8n-nodes-acrewity): verified by n8n, installable from the n8n interface - [n8n workflow templates](https://github.com/Acrewity/n8n-workflow-templates)