Tools That Make Working With Data Easier

Format, validate, and convert JSON, YAML, Markdown, and CSV with fast, secure tools that never send your data to a server.

JSON Tools

Format, validate, and convert JSON data.

JSON Formatter: Beautify and minify JSON.
JSON to CSV: Convert JSON arrays to CSV.
JSON to YAML: Convert between JSON and YAML.
JSON to TS: Generate TypeScript interfaces.

Markdown & HTML

Convert and preview markup languages.

HTML to Markdown: Convert HTML to clean Markdown.
Markdown Preview: Live Markdown editor.
CSV to Markdown: Create Markdown tables from CSV.

Documents

Extract content from office documents.

DOCX to Markdown: Convert Word docs to Markdown.
DOCX to HTML: Convert Word docs to HTML.
PDF to Markdown: Extract text from PDFs.
HTML to PDF: Convert HTML to PDF.

Utilities

Essential developer utilities.

Base64 Encoder/Decoder: Encode/Decode Base64 strings.
Base64 Image: Convert images to Base64.
URL Encoder: URL encode and decode text.
UUID Generator: Generate random UUIDs.
GitHub Actions: Generate CI/CD workflows.

🔒

Privacy First

All processing happens locally in your browser

⚡

Lightning Fast

No server delays, instant results

🆓

Completely Free

No subscriptions, no account required

Recent Guides

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How to Convert DOCX to HTML (Clean & Semantic)

Learn how to convert Microsoft Word DOCX files to clean, semantic HTML5 using automated tools, best practices, and common cleanup steps.

Nov 29, 2025 • html

Base64 Images: When and How to Use Data URIs

Learn when to use Base64 encoding for images, the performance implications, and how to optimize your web assets.

Nov 26, 2025 • general

HTML to PDF: Best Practices for Perfect Conversions

Learn how to format your HTML for perfect PDF conversions. Tips for styling, layout, and troubleshooting common issues when generating PDFs from web content.

Nov 25, 2025 • html

About FreeDataTools.dev

Our Mission

FreeDataTools.dev provides developers with fast, reliable, and privacy-focused conversion tools. Our mission is to make data transformation simple, secure, and accessible to everyone.

Our Tools

We offer a comprehensive suite of conversion tools including:

JSON Tools: Format, validate, convert to CSV/YAML, and generate TypeScript types
Markdown & HTML: Convert between formats and preview Markdown in real-time
Document Conversion: Extract text from DOCX and PDF files
Utilities: Base64 encoding, URL encoding, and UUID generation

Open Source

FreeDataTools.dev is built with modern web technologies including Astro, React, and Tailwind CSS. We believe in transparency and the power of open-source software.

Get in Touch

Have feedback or suggestions? We'd love to hear from you! Check out our guides for tutorials and tips on using our tools effectively.

🔒 Privacy First

All processing happens in your browser. Your data never leaves your device.

⚡ Lightning Fast

Client-side processing means instant results with no server delays.

🆓 Completely Free

No subscriptions, no hidden fees, no account required.

🛠️ Developer Focused

Built by developers, for developers, with the tools you actually need.