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How to Use the Open Graph Image Generator — WebdevToolbox Guide

Build a real 1200×630 Open Graph / Twitter Card share image with a title, subtitle, and gradient background, rendered on a canvas and downloadable as a PNG.

WebdevToolbox Team3 min read

A missing or generic og:image is one of the easiest ways to lose clicks when a page gets shared on social media — a clean, branded share image makes a link look intentional instead of broken. This tool builds a real one, right in your browser.

What Is the Open Graph Image Generator?

Unlike a meta-tag preview tool (which only shows you how an existing og:image will look), this generates the actual image file. Set a title, subtitle, site label, and two gradient colors, and the tool renders a proper 1200×630 canvas image that you can download as a PNG and upload directly as your page’s og:image / twitter:image.

How to Use It

  1. Open the tool at /tools/og-image-generator.
  2. Enter your page title, subtitle, and site label.
  3. Pick two background colors — use the same color twice for a flat background, or two different colors for a gradient.
  4. Choose a text color that contrasts well with your background.
  5. Click Download PNG to save the finished 1200×630 image.

Key Features

  • Standard 1200×630 size, the widely recommended dimensions for Open Graph images across Facebook, LinkedIn, Slack, and most other platforms.
  • Automatic text wrapping, so long titles and subtitles fit cleanly without overflowing the canvas.
  • Live gradient preview as you adjust the two background colors.
  • Entirely client-side rendering via the HTML5 Canvas API — no server upload, no account needed.

When to Use This Tool

  • Publishing a new blog post or landing page that needs a proper social share image.
  • Refreshing an outdated or missing og:image on an existing page.
  • Quickly prototyping share-card designs before building a more elaborate templated version.

Try It Now

Open Open Graph Image Generator directly, or press ⌘K and type the tool name from anywhere on the site.


Part of the Image & Media collection on WebdevToolbox — free, browser-based developer tools with no login required.

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