# Cuelark Render

> Free chart maker and Open Graph image generator in your browser, plus one API and MCP server for chart images, social cards, HTML to PDF and website screenshots.

Base API: https://render.cuelark.com/v1 (no key needed today). MCP server: https://render.cuelark.com/mcp (Streamable HTTP, no auth). Charts and social cards are free and rate limited (120/min per IP); PDFs and screenshots are capped at 10/day per IP. Nothing is stored or logged.

## Charts
- [Chart maker](https://render.cuelark.com/chart-maker): Paste or type your numbers, pick a chart type, and download a clean PNG or SVG. It's free, there's no sign-up and no watermark.
- [Bar chart maker](https://render.cuelark.com/bar-chart-maker): Enter your categories and values to get a bar chart with optional value labels, stacking or horizontal bars, then download it as PNG or SVG.
- [Pie chart maker](https://render.cuelark.com/pie-chart-maker): Type each slice's name and value, and the maker works out the percentages, labels the slices and adds a legend. Download PNG or SVG.
- [Line graph maker](https://render.cuelark.com/line-graph-maker): Paste a table with one column per line and get a multi-line graph you can switch to an area chart and download as PNG or SVG.
- [JSON to chart](https://render.cuelark.com/json-to-chart): Paste a Chart.js config, a simple {"label": value} object or an array of {label, value} records, and you get a chart right away.
- [CSV to chart](https://render.cuelark.com/csv-to-chart): Copy cells from Excel or Google Sheets, or paste CSV, and the first row becomes series names and the first column becomes labels. The chart draws as you paste.
- [Chart image API](https://render.cuelark.com/chart-image-api): Send chart data as JSON in a URL or a POST body to https://render.cuelark.com/v1/chart and get a PNG or SVG image back, cached at the edge.

## Social images
- [OG image generator](https://render.cuelark.com/og-image-generator): Type a title and description, pick a theme, and download a 1200×630 Open Graph image, or use its permanent URL directly as your og:image.
- [X (Twitter) card generator](https://render.cuelark.com/twitter-card-generator): Make a 1200×675 summary_large_image picture for links shared on X and copy the twitter:card meta tags that make it show up.
- [Open Graph image size](https://render.cuelark.com/open-graph-image-size): Use 1200 × 630 pixels (1.91:1 aspect ratio), as a PNG or JPEG under 5 MB, with key text inside the center 1000 × 520 area.

## PDF
- [HTML to PDF API](https://render.cuelark.com/html-to-pdf-api): POST your HTML or a public URL to https://render.cuelark.com/v1/pdf and get back a PDF printed by real Chromium, with your CSS, fonts and page size.
- [URL to PDF](https://render.cuelark.com/url-to-pdf): Paste a public web page link, choose Letter or A4, and get a PDF of the page as Chromium prints it, with no extension or sign-up.
- [Markdown to PDF](https://render.cuelark.com/markdown-to-pdf): Write or paste Markdown, see it styled as you type, and export a clean Letter or A4 PDF with tables, code blocks and page breaks.
- [Invoice PDF generator](https://render.cuelark.com/invoice-pdf-generator): Fill in the invoice fields, check the preview, and download a print-ready PDF. Developers can send the same HTML template to the PDF API to automate it.

## Screenshots
- [Screenshot API](https://render.cuelark.com/screenshot-api): POST a public URL to https://render.cuelark.com/v1/screenshot and get a PNG, JPEG or WebP of the page from real Chromium, at any viewport size or full page.
- [Website screenshot](https://render.cuelark.com/website-screenshot): Paste a link, choose desktop or mobile width and whether to capture the full page, and download a PNG or JPEG of the site.
- [HTML to image API](https://render.cuelark.com/html-to-image-api): POST HTML and CSS to https://render.cuelark.com/v1/screenshot with the html field and a viewport size, and get back a PNG, JPEG or WebP image of it.

## Developers
- [API docs](https://render.cuelark.com/docs): /v1/chart, /v1/og, /v1/pdf, /v1/screenshot
- [MCP server](https://render.cuelark.com/mcp): render_chart, social_card, html_to_pdf, screenshot_url
- [vs QuickChart](https://render.cuelark.com/compare/quickchart): Pick QuickChart if you need full Chart.js with plugins or a self-hosted open-source renderer. Pick Cuelark Render for free static chart images with no license question, plus OG images, PDFs, screenshots and an MCP server from the same API.
- [vs PDFShift](https://render.cuelark.com/compare/pdfshift): PDFShift is the more complete paid HTML-to-PDF service (headers and footers, encryption, watermarks, S3 delivery, async). Cuelark Render is a simpler free option for occasional PDFs that also makes charts, OG images and screenshots.
- [vs ScreenshotOne](https://render.cuelark.com/compare/screenshotone): ScreenshotOne is a mature paid screenshot API with ad and cookie-banner blocking, S3 upload, webhooks and signed links. Cuelark Render covers basic free screenshots and adds free chart and social-card images.

## Other Cuelark sites
- [Free tools](https://tools.cuelark.com): image, PDF and text tools in the browser
- [QR codes](https://qr.cuelark.com): free QR codes that never expire
- [Cuelark UI](https://ui.cuelark.com): React components