Drop HTML files here
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Merged HTML code will appear here after you click Merge Files.
A live rendered preview of your merged HTML will appear here after merging.
What Is HTML File Merging?
HTML merging is the process of combining two or more separate HTML files into a single, unified document. Developers reach for this technique when assembling modular page templates, consolidating a multi-page project into a single-page application, or stitching together HTML exports from different editors before handing them off to a CMS.
At its simplest, merging two HTML files might mean copying the <body> content of a secondary file and pasting it below the content of a primary file. But real projects demand smarter handling: you need to avoid duplicating <meta> tags, conflicting <title> elements, or redundant stylesheet <link> references that bloat your page's head. Our tool handles all of that automatically.
How it works in practice: suppose you have a header.html, main-content.html, and a footer.html built by three different team members. Instead of manually pasting, hunting for duplicate viewport meta tags, and reformatting the result, you simply drop all three files here, choose "Body Content Only" as your merge strategy, and the tool extracts each body block in order, separates them with an HTML comment for clarity, and hands you a clean, single file ready to deploy.
The tool also supports a "Full Document" strategy which intelligently combines entire HTML documents — keeping one doctype declaration, one <html> tag, and a unified <head> where identical meta tags appear only once. This is especially useful when you are merging exported HTML from tools like Figma, Webflow, or Framer that each generate a standalone document structure.
Because all processing runs entirely in your browser using the native DOM and FileReader APIs, your code never leaves your device. There is no server, no upload, no storage. What you write stays yours — a real advantage when working with proprietary front-end code or client projects under NDA.
100% Private & Secure
All merging happens in your browser via JavaScript. Zero file uploads. Your HTML code never touches any server.
5 Smart Merge Modes
Body-only, full document, raw concat, CSS extraction, or JS extraction — choose exactly what you need from your files.
Drag-to-Reorder Files
Set the exact order your files merge in. Drag and drop file items in the list to rearrange before processing.
Auto Deduplication
Removes duplicate <meta>, <script src>, and <link> tags so your merged file has a clean, valid head section.
Live Preview
Instantly preview how your merged HTML renders in a sandboxed iframe — catch layout issues before downloading.
Fast Processing
Browser-native FileReader API processes files in milliseconds. Up to 20 files and 10 MB each, no waiting.
Minify Option
Optionally strip excess whitespace and blank lines from the merged output to reduce file size before deploying.
One-Click Download
Download your merged HTML file instantly with a sensible filename. Copy to clipboard also available with one tap.
Upload Files
Drop your .html or .htm files into the upload zone, or click Browse to select from your device.
Reorder & Configure
Drag files into the order you want, then choose a merge strategy and toggle deduplication options.
Merge
Click Merge Files. The tool processes everything in your browser in milliseconds.
Preview & Download
Preview the result in the sandboxed iframe, then download your clean, merged HTML file.
Is my HTML data safe when using this tool?
Yes — completely. All merging happens entirely in your browser using JavaScript's FileReader API and native DOM parsing. No files are uploaded to any server, and your source code never leaves your device. This tool works offline once the page has loaded.
How many HTML files can I merge at once?
You can merge up to 20 HTML files in a single session, with each file up to 10 MB in size. You can drag the listed files to reorder them before running the merge. If you need to merge more than 20 files, process them in batches and merge the resulting outputs.
What merge strategies are available?
Five strategies: Body Content Only extracts just the <body> content from each file. Full Document combines complete documents with intelligent head deduplication. Raw Concatenation joins the raw source as-is. Extract CSS Only pulls all <style> blocks and <link> stylesheet references into a single CSS file. Extract JS Only extracts all inline <script> blocks into a single JS output.
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