Free Developer Tools Online

Format, minify, validate, and convert code in your browser. No sign-up, no ads, no install. Paste and go.

Start With JSON Beautifier

HTML

HTML Formatter

Beautify messy HTML with proper indentation.

HTML Minifier

Compress HTML by stripping comments and whitespace.

HTML Validator

Catch unclosed tags, missing alt text, and nesting errors.

HTML Encode / Decode

Convert special characters to HTML entities and back.

CSS

CSS Formatter

Pretty-print CSS with consistent spacing and indentation.

CSS Minifier

Reduce CSS file size by removing whitespace and comments.

JavaScript

JS Formatter

Format JavaScript code with Prettier for readable output.

JS Minifier

Shrink JS by stripping comments and unnecessary whitespace.

JSON & XML

JSON Beautifier

Prettify minified JSON with proper indentation.

JSON Validator

Check JSON syntax with line-level error messages.

JSON to XML

Convert JSON objects and arrays to well-formed XML.

XML to JSON

Parse XML into structured JSON with attribute support.

Markdown

Markdown to HTML

Render Markdown as HTML for blogs, docs, and emails.

HTML to Markdown

Convert HTML into clean, portable Markdown.

Network

URL Parser

Break any URL into protocol, host, path, query, and hash.

DNS Lookup

Query A, AAAA, MX, NS, and TXT records for any domain.

Why Use Linkyhost Developer Tools?

Runs In Browser

Your code never leaves your device. All formatting and validation happens client-side.

Prettier-Backed

HTML, CSS, and JS formatters use Prettier — the same formatter your favourite IDE runs under the hood.

Instant & Free

No sign-up, no paywalls, no rate limits. Paste your code, click a button, copy the output.

How It Works

Pick a Tool

Choose the formatter, minifier, or converter you need from the grid above.

Paste Your Code

Drop HTML, CSS, JSON, or JS into the input area. No file upload required.

Copy the Result

Click the action button and copy the output. Everything runs in your browser.

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