Free Online Developer Tools for Text, Code & Document Conversion

RosettaScript offers 20+ free online developer tools for converting, cleaning, formatting, and automating text and code. Whether you need a Word to HTML converter, JSON formatter, Base64 encoder, or more, these tools run entirely in your browser without signup or cost. These tools help developers, content editors, and technical writers save time while maintaining quality.

Popular Online Developer Tools

My collection of free developer tools covers everything from document conversion to code formatting. Each tool runs entirely in your browser—no server uploads, no data storage, complete privacy.

Word to HTML Converter

Clean up Word-generated HTML and convert documents to semantic, SEO-friendly HTML code.

JSON Formatter & Validator

Format, validate, and beautify JSON data with syntax highlighting and error detection.

Base64 Encode/Decode

Encode images or text to Base64, or decode Base64 strings back to readable format.

Hash Generator

Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes for passwords and data integrity.

Regex Tester

Test and debug regular expressions with live matching and capture group extraction.

Web Scraper

Extract data from websites using CSS selectors. Free, fast, and runs in your browser.

JSON Data Extractor

Extract specific fields from JSON structures using path syntax or field names.

Text Cleanup & Case Converter

Normalize text, convert cases, and clean up formatting issues in your content.

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Why Use RosettaScript Developer Tools

No Signup Required

All my developer tools are completely free and require no account creation. Start using any tool instantly—no email, no passwords, no barriers.

Runs Locally in Browser

Every tool processes data entirely in your browser. Your content never leaves your device, ensuring complete privacy and security for sensitive documents and code.

Privacy-Focused

I don't store, track, or analyze your data. All processing happens client-side, making these tools perfect for handling confidential information and proprietary code.

Open Source

RosettaScript is an open-source project built by a developer, for developers. You can review the code, contribute improvements, or use it as a reference for your own projects.

Who These Tools Are For

Web Developers

Format JSON, encode data, generate UUIDs, test regex patterns, and convert between formats quickly.

Content Editors

Convert Word documents to clean HTML, format text, and prepare content for web publishing.

Technical Writers

Clean up HTML from documentation tools, format code snippets, and ensure consistent formatting.

SEO Specialists

Generate clean HTML code, test regex patterns, and extract data from websites for SEO analysis.