Developer topic guide
Formatters
Format and minify HTML, CSS, JavaScript, SQL, XML, YAML, and Markdown in your browser.
Topic guides
Browse focused guides that compare related tools and link to the best starting point for your task.
- JSON toolsFormat, validate, compare, and convert JSON with free developer utilities in your browser.
- JWT toolsDecode, encode, and generate JSON Web Tokens in your browser with Utilnivo JWT tools.
- Encoding toolsBase64, URL, and HTML encoding utilities for developers — free and browser-based.
- FormattersFormat and minify HTML, CSS, JavaScript, SQL, XML, YAML, and Markdown in your browser.
- Network toolsDNS, WHOIS, SSL, HTTP headers, and cURL helpers for quick network debugging in your browser.
- Security toolsHash, checksum, and regex utilities for developers — free browser-based security helpers.
- UUID toolsGenerate and decode UUIDs with free developer tools in your browser.
Tools in this guide
Overview
Formatters beautify code for review; minifiers remove whitespace for production bundles. Utilnivo groups language-specific tools so you can pick the grammar you are editing.
Minified output should be tested before deploy — aggressive minification can break templates that relied on significant whitespace. Compare tools (XML Compare) help review config drift between environments.
CSV Viewer and Markdown Previewer add readable views for data and docs without leaving the browser.
How to choose
- Web stack → HTML, CSS, or JavaScript Formatter.
- Config/data → XML, YAML, or SQL Formatter.
- Production bundle → HTML, CSS, or JS Minifier.
- Docs preview → Markdown Previewer.
Frequently asked questions
Do formatters fix syntax errors?
They may fail on invalid input. Use validators first when parsing fails.
Is minification reversible?
Beautifiers can re-indent but cannot restore lost comments.
Which formatter for mixed files?
Pick the language-specific tool. Do not paste HTML into the CSS formatter.
Related workflows
These multi-step guides chain tools from this category for common jobs.