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OG Image Generator — Create Social Share Images for Your Blog

Generate Open Graph images for your blog posts. Customize title, subtitle, and background to create perfect social share images.

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OG Image Generator

Preview

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How It Works

1.Enter Your Details

Type your blog post title and optional subtitle or site name.

2.Preview in Real Time

See your OG image update instantly as you type. Adjust title case, font, and background.

3.Download or Copy

Download as PNG or copy the image URL. Paste into your CMS or social media manager.

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Why OG Images Matter

Open Graph images are the large preview images that appear when you share a link on social media, messaging apps, or search results. A great OG image can dramatically improve click-through rates.

  • Posts with OG images get 2-3x more clicks on social media
  • Professional images build trust with your audience
  • Consistent branding across all shared links
  • No design skills needed — generate in seconds
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Markdown Converter

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Or start with the main HTML cleanup tool

Open Publish Helper
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Frequently Asked Questions

What size is the generated image?

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1200×630 pixels — the standard Open Graph image size used by Facebook, Twitter, LinkedIn, and most platforms.

Is this tool free?

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Yes, completely free with no signup required.

Can I use generated images commercially?

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Yes. Generated images are yours to use anywhere with no attribution required.

Does my content leave my browser?

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The image is generated entirely in your browser using HTML Canvas. Nothing is sent to any server.

Changelog

v3.0.02026-05-03
  • NewHTML Diff Viewer — compare before and after HTML with a visual diff (green/red)
  • NewContent Stats Calculator — word count, reading time, heading, image, and link counts
  • NewHTML Accessibility Checker — detect missing alt text, empty headings, skipped levels, and more
  • NewOG Image Generator — create 1200×630 social share images from your blog post title
  • NewMarkdown ↔ HTML Converter — bidirectional conversion between Markdown and HTML
  • NewTable of Contents Generator — auto-generate nested TOC from heading tags in HTML or Markdown
  • NewJSON-LD Structured Data Builder — generate Article, BlogPosting, and FAQPage schema markup
  • NewAuto-clean on paste — optional toggle that auto-triggers cleanup when content is pasted
  • NewTable cleanup options — strip cell widths and remove empty table cells
  • NewAuto-save draft — content is saved to localStorage and restored on accidental refresh
  • NewAll new tools linked from the main page TOOLS & GUIDES section and related pages
v2.4.12026-04-27
  • NewParagraph option added to heading dropdown — convert headings back to normal text
  • FixH1–H6 heading prefixes now convert correctly even when pasted with leading line breaks
  • FixFixed page crash on load — cookie consent now renders reliably
  • ImprovedDependency updates for better performance and stability
v2.4.02026-04-17
  • NewClear button — quickly wipe all editor content and reset the HTML panel from the left panel header
  • FixEmpty <p></p> placeholder no longer appears in the HTML panel after clearing the editor
  • NewImage insert via URL — paste any image URL into the editor with a new toolbar popover
v2.3.22026-04-14
  • FixHeading conversion rewritten with DOM parsing — now works with any wrapper tag, split headings (H1 + body in same <p>), and safely preserves <li> inside lists
  • FixEmpty heading tags left behind by Google Docs are now automatically removed
v2.3.12026-03-25
  • FixHeading conversion now handles spaces before the colon (e.g. "H2 : Title")
  • FixRight-to-left content (Arabic, Hebrew) no longer inverts embedded English text in the editor
  • FixSpacer paragraphs (&nbsp;) are now preserved in the HTML output instead of being stripped
v2.3.02026-03-20
  • NewCJK auto-spacing — automatically insert spaces between Chinese/Japanese/Korean characters and English letters or numbers (powered by pangu.js)
  • NewStandalone CJK Auto-Spacing tool page with before/after examples, FAQ, and SEO-optimized bilingual content
  • NewChinese UI text auto-spacing — zh-TW interface text now has proper CJK–Latin spacing
  • FixMobile toolbar no longer floats and follows scrolling — stays pinned at the bottom of the editor
  • FixMobile toolbar buttons now scroll horizontally instead of overflowing
  • FixFind & Replace inputs no longer break out of the container on narrow screens
v2.2.12026-03-20
  • FixHeading conversion now uses the text prefix (e.g. H3:) to set the heading level, even when the content is already inside a different heading tag
v2.2.02026-03-18
  • NewAI-Powered Title to SEO Slug — Convert blog titles in any language to SEO-friendly English slugs in under 10 seconds
  • NewSlug generator toggle on the main page — generate slugs right after editing, above the fold
  • NewTable support — pasted tables from Google Docs now render correctly
  • NewRemove <br> after headings cleanup option (on by default)
  • NewPartial text selection copy in the HTML code view
  • NewSticky Clean HTML button at the bottom of the page
  • ImprovedHeading conversion now strips prefixes from existing heading tags and supports Chinese full-width colon (：)
  • ImprovedShared footer across all pages
v2.1.22026-03-17
  • FixBug fixes and improvements
v2.1.12026-03-16
  • FixBug fixes and improvements
v2.1.02026-03-16
  • NewFormatted/Raw toggle for the HTML code view
  • ImprovedCopying from the code panel now always gives clean, unformatted HTML
v2.0.02026-03-16
  • NewWelcome to Publish Helper — free online tools for content editors
  • ImprovedImproved search engine visibility
v1.1.02026-03-16
  • ImprovedClipboard copy — clean HTML output matches the code view
v1.0.02026-03-16
  • NewRich text editor with Google Docs paste support
  • NewHTML cleanup: strip styles, classes, empty tags, and Google Docs artifacts
  • NewHeading conversion from text prefixes to proper HTML tags
  • NewFind & replace with regex support and saveable presets
  • NewSyntax-highlighted HTML preview with one-click copy
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