Convert Excel to JSON Online - Free XLSX to JSON Converter

Turn Excel spreadsheets into JSON for APIs and web apps. Runs in your browser, zero data sent.

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.xlsx → .jsonDataLosslessInstantRuns 100% in your browser

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About XLSX to JSON conversion

Excel spreadsheets store data in a compressed, styled binary format that's built for spreadsheet software, not applications. Converting to JSON reshapes each row into an object keyed by its column headers - the same shape a REST API or JavaScript app expects.

This skips the usual XLSX → CSV → JSON detour, going straight from a spreadsheet to structured data ready for a frontend, API, or database seed script.

Common use cases

  • Feeding Excel data directly into a JavaScript application
  • Converting spreadsheet exports for API testing
  • Turning Excel-based configuration into structured JSON
  • Preparing spreadsheet data for a no-code tool or automation platform

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FAQ: XLSX to JSON conversion

Why choose our file content conversion tool

Browser-based file content conversion beats upload-based tools on privacy, speed, and cost.

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No software or extensions needed. Works on all devices.
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Built for speed with optimized performance for all browsers.
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Convert on Windows, Mac, Linux, Android, or iOS seamlessly.

Trusted by developers, analysts, and content teams

4.9/5
from 2,200+ users

I use the CSV to JSON converter daily for backend testing. It's instant, no login, and the output is clean. Exactly what I needed.

AK
Ali K.
Full-stack developer

Finally a DOCX to HTML tool that doesn't mangle the formatting. Converted 40 articles in 20 minutes.

SR
Sarah R.
Content manager

XLSX to CSV in one click with zero setup. I've tried five other tools - this is the only one that runs entirely in the browser.

MP
Marco P.
Data analyst
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