HTML Viewer
Paste HTML, see rendered preview side-by-side. Split view, code highlighting, download.
Tool hub12 tools
Developer Tools Hub
Browser-based utilities for HTML, CSS, JavaScript, TypeScript, regex, and Markdown — the everyday quick-tasks that do not need a full IDE: preview a snippet, validate markup, debug a regex, minify for production, or convert between formats.
Regex Tester
Real-time pattern debugging with match highlights, capture groups, and all flags.
HTML to JSX Converter
Convert HTML to React JSX. Fixes className, self-closing tags, inline styles, SVG attributes.
JavaScript Obfuscator
Protect client-side code with control-flow flattening, string encoding, dead-code injection.
HTML Minifier
Strip whitespace and comments from HTML for smaller payload size in production.
CSS Minifier
Compress CSS for production with safe minification rules.
JavaScript Minifier
Reduce JS file size without breaking functionality. Safe defaults for production.
HTML Validator
Catch malformed markup, unclosed tags, and accessibility issues before deployment.
TypeScript to JavaScript Converter
Strip types from TS code to produce plain JavaScript for runtime or older toolchains.
Markdown Viewer
Live Markdown preview with GFM support, toolbar, save/load .md files.
Markdown to HTML Converter
Convert .md files to clean HTML with live preview for CMS or static-site workflows.
HTML to PDF Converter
Generate PDFs from HTML markup for reports, invoices, and printable views.
When a browser tool beats opening your IDE
VS Code, WebStorm, and the rest of your IDE arsenal are the right answer when you are actively coding — files open, repo cloned, dependencies installed, dev server running. They are the wrong answer for the constant small interruptions: a teammate pastes an HTML snippet in chat and asks “does this render OK?”, a regex from Stack Overflow looks suspect, a build pipeline produces minified code and you want to check it, a CMS gives you HTML output and you need to preview it without copying into a project.
The tools on this hub are scoped to those interruptions. Open a tab, paste, get an answer, close. No project structure, no dependencies, no “let me boot the dev server first.” Combined cost: a couple of seconds per task, with no setup overhead.
Recommended pairings
HTML Viewer + HTML Validator + HTML Minifier — the complete draft-to-production HTML workflow. View the rendered output, validate the markup is correct, then minify before shipping. Three tabs, ~30 seconds.
Regex Tester + the language-specific docs — when you are debugging a regex, the live highlighter shows you exactly what matches and what does not, with capture groups labeled. Combine with the JavaScript/Python/Go regex docs for syntax differences.
HTML to JSX Converter + your React setup — when migrating templates, snippets, or design-system markup from plain HTML into React components. Handles the boring parts (className, camelCase events, self-closing tags) so you can focus on the structural changes.
Markdown Viewer + Markdown to HTML Converter — for documentation and content work. The viewer is for live editing; the converter is for producing publish-ready HTML once the draft is finalized.
The case for client-side processing
Every tool here runs entirely in your browser. No upload, no telemetry of file contents, no server-side processing. For private code, internal templates, draft markup, or anything under NDA, that is the only acceptable processing model. Online services that work by uploading your code do not provide this guarantee — the code lives on their servers until they delete it, which is rarely audited.
The trade-off is processing limits: browser memory caps out faster than a server. For huge files (hundreds of MB of minified bundles, full-site Markdown imports) a CLI tool is more reliable. For everyday snippets, browser-based processing is faster end-to-end because there is no upload latency.
Related hubs
- JSON Tools Hub — JSON validation, formatting, and conversion to CSV/XML/YAML.
- Security & Hash Tools — SHA, HMAC, MD5, bcrypt, and JWT utilities for backend and cryptographic workflows.
- Encoder/Decoder Tools — Base64, URL, HTML entities, hex, and binary encoding utilities.
- SEO Tools Hub — robots.txt, schema markup, meta tags, sitemap, and discovery utilities.