Email Compatibility Fixer
One-stop fix for email rendering challenges: solve dark mode invisibility, Outlook layout issues, Gmail clipping, and missing accessibility. Free, non-destructive injection that protects your brand identity—everything runs locally in your browser.
Why use AI Generator
- Paste Email HTML
- Smart Analysis & Diagnosis
- One-Click Apply Fixes
- Runs locally in your browser — no uploads, no storage of email HTML
How to Fix Email Compatibility & Dark Mode Issues
Paste Email HTML
Paste or upload your email template code into the fixer tool.
Smart Analysis & Diagnosis
The system automatically detects dark mode support, Outlook rendering risks, Gmail clipping, and image accessibility.
One-Click Apply Fixes
Click "Smart Fix" to automatically inject CSS patches, optimize code structure, and complete compatibility attributes.
Preserve MSO conditional comments
We keep Outlook-only blocks like <!--[if mso]>…<![endif]--> so conditional fixes are not lost during processing.
Smart Analysis & Diagnosis
The system automatically detects dark mode support, Outlook rendering risks, Gmail clipping, and image accessibility.
One-Click Apply Fixes
Click "Smart Fix" to automatically inject CSS patches, optimize code structure, and complete compatibility attributes.
Frequently Asked Questions
Will my email content be leaked or stored on your servers?
No. The email compatibility analysis and fix process happens entirely in your local browser. No registration is required to use the tool. If you wish to enter the editor and save your content, you can choose to sign up for an account.
What compatibility issues does this tool solve?
Beyond dark mode adaptation, it solves Gmail clipping (over 102KB), Outlook table gaps and missing background images, broken button radius or image-only CTAs, missing ALT/size attributes, missing viewport tags, GIF animation loss in Outlook, missing preheaders, and incomplete font stacks.
Will it break Outlook?
Not only will it not break, but we also inject specific MSO patches for Outlook (Word engine) to ensure that unsupported features like border-radius and line-height perform more stably.
Why does my logo disappear in dark mode?
Email clients may invert colors or apply dark backgrounds, making dark logos invisible. Our tool adds a CSS filter to make your logo visible in dark mode again.
Does HTML minification affect code readability?
Minification only happens during export, aiming to reduce size to avoid Gmail clipping. We use non-destructive algorithms that won't affect the final rendering in any client.
Is it completely free?
Yes! This tool is completely free—no registration required, and you can use it and download results directly.
Ready to improve your email compatibility?
Solve Outlook, Gmail, and Dark Mode rendering issues in seconds—free to use.
Fix NowBest experience on desktop
Full editing features work best on desktop. Open htmldrag.com on your computer for the complete experience.
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