What is Document Converter?
Document Converter is a free browser-based tool that runs entirely in your browser. No file uploads, no account needed, and no data stored. Fast, private and always free.
This tool lets you csv↔json, json↔xml, markdown→html, yaml→json without installing any software or creating an account. Everything runs directly in your browser for maximum privacy. Your files and data never leave your device.
Use it for quick tasks at any time from any device — desktop, tablet or mobile. No subscription, no ads, no limits.
⚡
Instant results
No server processing or wait
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100% private
Files stay on your device
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Always free
No subscription or fees
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Mobile ready
Works on any device
How to use Document Converter
- Open the Document Converter tool
- Enter your input data or upload your file
- Configure the settings for your use case
- Download or copy the result
Why use OnlineToolsPlus?
OnlineToolsPlus processes everything locally in your browser. Your files, text and data never leave your device, which eliminates server-side privacy risks. With 200+ free tools covering PDF, image, AI writing, developer utilities, calculators, SEO, color tools and more, there is no need to juggle multiple subscriptions or install software.
Frequently asked questions
What document formats can I convert between?
CSV to JSON, JSON to CSV, JSON to XML, XML to JSON, Markdown to HTML, HTML to Markdown, YAML to JSON, and JSON to YAML are all supported.
Is the conversion exact or does data change?
For structured data formats like CSV, JSON, XML, and YAML, the conversion is exact. Data values are preserved. Only the format and syntax change. Markdown to HTML conversion produces equivalent HTML markup for the Markdown syntax.
Can I convert large files?
Everything runs in your browser. Large files may be slower but there is no hard limit. CSV files with thousands of rows and JSON files with complex nested structure are both handled.
Will special characters survive conversion?
Yes. Unicode characters including accented letters, Arabic, Chinese, and other non-Latin characters are preserved through conversion.
Does CSV to JSON handle headers?
Yes. The first row of the CSV is treated as the header row and becomes the key names in the JSON output objects.
Can I convert HTML to plain text?
HTML to Markdown produces a clean text-based representation. For plain text without any markup, copy the Markdown output and strip the remaining formatting manually.
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Last updated: April 11, 2026
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