Free Online Text Tools

Text tools help you transform, analyze, and convert text content without leaving your browser. Common tasks include converting Markdown to HTML for documentation, changing text case for code identifiers or titles, comparing two versions with a diff checker, counting words and characters for writing constraints, and performing find-and-replace operations across large documents. These tools are essential for writers, developers, and content editors who work with plain text, Markdown, HTML, and other text-based formats. All processing happens locally in JavaScript, so your drafts, notes, and proprietary content never hit a conversion API. This is especially important for confidential documents, unpublished writing, or code snippets that contain secrets. Tools in this category include Markdown↔HTML converters (with live preview and sanitization), case converters (uppercase, lowercase, Title Case, camelCase, snake_case, kebab-case), word and character counters (with reading time estimates), text diff checkers (side-by-side comparison), find-and-replace utilities (with regex support), and HTML entity encoders/decoders. Whether you're preparing a README for GitHub, formatting a blog post, analyzing an essay, or cleaning up pasted HTML, these text tools run fast, stay private, and require no account.