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Code Tools

For tickets, READMEs, and quick reviews you often need a formatted SQL query, minified HTML demo, Markdown preview, or a two-pane diff of a snippet. These helpers stay in the browser so paste-sensitive code does not need a throwaway gist.

25 free tools · Browse all tools

All Code Tools

SQL Formatter

Beautify SQL queries with keyword casing and readable line breaks.

Markdown Preview & HTML Converter

Write Markdown with live preview and copy the generated HTML.

HTML Formatter

Beautify or minify HTML markup in your browser.

Code Diff Viewer

Side-by-side line diff for code snippets and config files.

Code Minifier (JS/CSS)

Minify JavaScript or CSS by stripping comments and extra whitespace.

Code Formatter

Format JavaScript, JSON, CSS, and HTML with a lightweight Prettier-like tool.

HTML to Markdown Converter

Convert common HTML markup into Markdown text.

HTML Minifier

Minify HTML by removing comments and unnecessary whitespace.

Syntax Highlighter

Highlight source code for common languages with highlight.js.

Code to Image Converter

Render a code snippet as a shareable PNG image.

Code Extras Toolkit

Simple JS obfuscation, regex-from-examples, and regex-to-code snippets.

XML Formatter

Beautify and indent XML for readable structure.

XML Validator

Check whether XML is well-formed in your browser.

XML Viewer

View and explore XML documents with formatted output.

XML Minifier

Compress XML by removing unnecessary whitespace.

XPath Tester

Evaluate XPath expressions against XML documents.

XML Compare

Compare two XML snippets and highlight differences.

YAML Formatter

Format and normalize YAML documents in the browser.

YAML Validator

Validate YAML syntax and surface parse errors clearly.

YAML Viewer

Parse YAML and view it as formatted YAML or JSON.

YAML Diff

Compare two YAML documents side by side.

SQL Validator

Basic SQL syntax checks for common query mistakes.

SQL Parser

Break SQL into clauses for quick inspection.

SQL Linter

Lint SQL for style and common anti-patterns.

SQL Query Builder

Build simple SELECT queries from form fields.

Frequently asked questions

For tickets, READMEs, and quick reviews you often need a formatted SQL query, minified HTML demo, Markdown preview, or a two-pane diff of a snippet. These helpers stay in the browser so paste-sensitive code does not need a throwaway gist.

Yes. Every tool in Code Tools is free to use with no account required.

No. Tools run locally in your browser so inputs stay on your device.

25 tools are available in Code Tools, including SQL Formatter, Markdown Preview, HTML Formatter.

Yes. Pages are responsive. Desktop browsers are usually more comfortable for large payloads.

Popular tools

JSON Formatter & Validator

Beautify, minify, and validate JSON instantly in your browser.

Generator Tools

Lorem Ipsum Generator

Generate placeholder paragraphs, sentences, or words for mockups.

URL Encoder / Decoder

Encode and decode URL components with real-time conversion.

Crypto & Security Tools

UUID Generator

Generate RFC-compliant UUID v4 identifiers for apps and databases.

Recently added

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to plain text.

Crypto & Security Tools

Hash Generator

Generate MD5, SHA-1, and SHA-256 hashes from any text input.

Word Counter

Count words, characters, sentences, paragraphs, and reading time instantly.

Case Converter

Convert text to UPPER, lower, Title Case, camelCase, snake_case, and more.