Text and Code Formatters Everyone Should Use

Formatting text and code makes it readable, easier to debug, and simpler to share. Whether you work with JSON, SQL, HTML, or Markdown, the right formatter can save time and reduce errors. This guide covers the formatters that are most useful in daily work and how to use them in a way that keeps your data on your device.

Why Formatting Matters

Unformatted or minified content is hard to read and edit. One long line of JSON, a compressed SQL query, or minified HTML makes it difficult to spot typos, missing brackets, or logical errors. Formatters add indentation and line breaks so structure is visible. They don’t change the meaning of the content—only the layout. When the tool runs in your browser, you can format sensitive configs or code without uploading them to a server.

JSON Formatter and Validator

JSON is used in APIs, config files, and data exchange. It often arrives minified: a single line with no spaces. A JSON formatter adds indentation and line breaks so you can see keys, values, and nesting. A validator checks that the string is valid JSON and, when it’s not, points to the approximate location of the error. Use a formatter when inspecting API responses, editing config files, or preparing data for documentation. Our JSON Formatter formats and validates in the browser. Paste your JSON and get a readable version or an error message with position. Your data is not sent to our servers.

What you get

• Indented, readable output. Optional syntax highlighting in some tools.
• Validation with error messages (e.g. “Unexpected token at line 5”). Fix the error and format again.
• No server upload when the tool is client-side.

SQL Formatter

Long SQL queries are easier to read when keywords and clauses are on separate lines and indented. A SQL formatter takes a compressed or messy query and restructures it for readability. Use it when reviewing queries, writing documentation, or debugging. Our SQL Formatter runs in your browser. Paste your query and get a formatted version. Your SQL is not uploaded. Note: formatting doesn’t change the behaviour of the query; it only changes layout.

What you get

• Consistent indentation for subqueries and clauses.
• Line breaks so that SELECT, FROM, WHERE, and JOIN are easy to see. Some formatters support different SQL dialects (e.g. MySQL, PostgreSQL).

HTML and CSS Formatters

HTML and CSS are often minified in production. When you need to edit or debug, a beautifier restores indentation and line breaks. Use an HTML formatter when you receive minified markup from a theme or build step. Use a CSS formatter when you need to understand or modify minified styles. Our HTML Beautify and CSS Beautify tools run in your browser. Paste the code and get a readable version. No server upload.

What you get

• Indented HTML so that nested tags are visible.
• Indented CSS so that rules and properties are easy to scan. Behaviour is unchanged; only formatting changes.

Markdown Previewer

Markdown is plain text with simple syntax for headings, lists, and links. A previewer shows how it will look when rendered—as you type. Use it when writing READMEs, docs, or blog posts in Markdown. Our Markdown Previewer runs in your browser. Type or paste Markdown and see the rendered result. Your text is not sent to our servers.

What you get

• Live preview so you can fix formatting before publishing.
• Support for common Markdown (headings, bold, italic, lists, links, code blocks). No need to guess how it will look.

Choosing Tools That Protect Your Data

• Prefer browser-based tools for sensitive or proprietary content. The tool should state that processing happens in your browser.
• Avoid pasting secrets into any tool you don’t trust. Even with client-side processing, don’t paste API keys or passwords into a form unless the tool is open source or you’ve verified its behaviour.
• Use our formatters for JSON, SQL, HTML, CSS, and Markdown—all run in your browser with no sign-up and no server upload. That way you get readable code and keep full control of your data.