XLSB to HTML Converter
Convert XLSB to HTML online for free. Fast, secure, and high-quality conversion with no sign-up or software required.
Maximum file size is 1GB
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Three steps to your converted file
Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.
Upload your file
Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.
Choose an output format
Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.
Convert & download
Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.
What is an XLSB file?
The XLSB (Excel Binary Workbook) format is a binary implementation of the Office Open XML (OOXML) standard, introduced with Microsoft Office 2007. Unlike XLSX, which parses XML text files, XLSB stores data in binary parts within a ZIP container, resulting in faster load times and reduced file size for massive datasets containing complex formulas. It supports all Excel features, including VBA macros, but is less interoperable with non-Microsoft parsers due to its binary nature.
How to open an XLSB file
Opening XLSB files requires Microsoft Excel 2007 or later for optimal performance and macro execution. While Windows and macOS rely on the Office suite, Linux users can utilize LibreOffice Calc, which supports reading and writing XLSB files, though execution of embedded proprietary VBA macros may be limited or require code adjustments.
XLSB Technical Info
- Full Name
- Excel Binary Workbook
- Developed By
- Microsoft
- Initial Release
- 2007
- MIME Type
- application/vnd.ms-excel.sheet.binary.macroEnabled.12
What is an HTML file?
HTML (HyperText Markup Language) is the standard markup language for documents designed to be displayed in a web browser, defined by the World Wide Web Consortium (W3C) and the WHATWG Living Standard. An HTML file consists of plain text tags that structure content into a Document Object Model (DOM), enabling the embedding of scripts (JavaScript), cascading style sheets (CSS), and multimedia. The format has evolved from SGML-based roots to the current HTML5 specification, which includes semantic elements and APIs for complex web applications.
How to open an HTML file
Operating systems universally support HTML rendering via pre-installed web browsers like Microsoft Edge (Windows), Safari (macOS), or Firefox (Linux). For source code modification, developers utilize specialized editors such as Visual Studio Code, IntelliJ IDEA, or Notepad++. No proprietary software is required, as the format is an open, non-proprietary standard text file.
HTML Technical Info
- Full Name
- HyperText Markup Language
- Developed By
- W3C / WHATWG
- Initial Release
- 1993
- MIME Type
- text/html
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Why RunConvert
The fastest way to convert any file
Purpose-built for speed, privacy, and breadth of format support.
Convert XLSB to HTML in seconds
Every XLSB to HTML conversion runs on our servers, so your device stays fast and the output quality stays intact.
Fast, cloud-powered
No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.
Secure & private
Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.
Free - no account needed
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Developer API
Convert XLSB to HTML via API
Automate XLSB to HTML conversions in three steps: create a job, upload your file, then poll for the result.
# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"tag": "xlsb-to-html",
"tasks": {
"upload-file": {
"operation": "import/upload"
},
"convert": {
"operation": "convert",
"input": "upload-file",
"output_format": "html"
},
"export-result": {
"operation": "export/url",
"input": "convert"
}
}
}'
# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.xlsb
# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
-H "Authorization: Bearer YOUR_API_KEY"Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.