Which developer tool to choose
If an API returns unreadable JSON, Format JSON tidies it and the validator tells you the line and column of the error. To move data into Excel, JSON to CSV; for configuration files, JSON to YAML; and to type a response, JSON to TypeScript.
Before shipping, minify HTML, CSS and JavaScript so the site weighs less; to read minified code, use the Prettier formatters. The CSS generators (gradients, shadows, border-radius, clamp() and calc()) are free with no limit.
What each tool does
| Tool | What it is for | Formats |
|---|---|---|
| App Icon & Favicon Generator | Every icon size for web, PWA, iOS and Android from one logo | PNG → ZIP |
| SVG Optimizer Pro | Clean, Minify & Compress Vector SVG Files by Stripping Redundant Bloat | SVG → SVG |
| JSON Formatter | Beautify JSON with readable indentation and spot errors instantly | JSON → JSON |
| JSON Validator | Check whether your JSON is valid and find the exact error with its line and column | JSON |
| JSON Minifier | Strip spaces and line breaks so your JSON takes up as little as possible | JSON → min |
| JSON to CSV Converter | Turn a list of JSON objects into a CSV table ready for Excel or Google Sheets | JSON → CSV |
| CSV to JSON Converter | Turn a spreadsheet exported as CSV into a list of JSON objects | CSV → JSON |
| JSON to YAML Converter | Turn JSON into clean YAML for Kubernetes, Docker Compose or GitHub Actions | JSON → YAML |
| YAML to JSON Converter | Turn YAML config files into JSON and find indentation errors | YAML → JSON |
| JSON to XML Converter | Turn JSON into well-formed XML, with attributes and the root element you choose | JSON → XML |
| XML to JSON Converter | Turn XML, RSS feeds or SOAP responses into easy-to-use JSON | XML → JSON |
| JSON to TypeScript Converter | Generate TypeScript interfaces from a sample JSON response | JSON → TS |
| JSON to JavaScript Converter | Turn JSON into a JavaScript object ready to paste into your code | JSON → JS |
| HTML Minifier | Shrink HTML by removing comments and whitespace | HTML → min |
| CSS Minifier | Compress CSS and merge duplicate rules | CSS → min |
| JavaScript Minifier | Compress and mangle modern JavaScript | JS → min |
| HTML Formatter | Beautify and indent HTML with Prettier | HTML → HTML |
| CSS Formatter | Beautify CSS, SCSS and Less | CSS → CSS |
| JavaScript Formatter | Beautify JavaScript, JSX and JSON | JS → JS |
| HTML to Markdown Converter | Convert HTML into clean Markdown | HTML → MD |
| Markdown to HTML Converter | Render GitHub-Flavored Markdown as HTML | MD → HTML |
| Markdown to PDF Converter | Turn Markdown into a clean, printable PDF | MD → PDF |
| HTML Entity Encoder | Escape special characters for HTML | < → < |
| HTML Entity Decoder | Turn HTML entities back into characters | < → < |
| CSS Gradient Generator | Linear, radial and conic gradients with live preview | CSS, Gradient |
| CSS Box Shadow Generator | Layered box shadows with live preview | CSS, Box Shadow |
| CSS Border Radius Generator | Rounded corners, pills, circles and blobs | CSS, Border Radius |
| CSS Clamp Generator | Fluid typography and spacing with clamp() | CSS, clamp(), Responsive |
| CSS Calc Generator | Build and test calc() expressions | CSS, calc() |
| PNG to ICO Converter | Create a multi-size ICO file from your PNG | PNG → ICO |
| SVG to ICO Converter | Turn your vector logo into a sharp ICO at every size | SVG → ICO |
| Color Converter Pro (HEX, RGB, CMYK, HSL, LAB) | Bidirectional Color Space Conversion, CMYK Gamut Warning & WCAG 2.1 Contrast | HEX → CMYK |
| URL Encoder | Turn spaces, accents and symbols into %XX so they are safe in a URL | Text → %XX |
| URL Decoder | Turn %20, %C3%B1 and other codes back into readable text, even when double-encoded | %XX → Text |
| URL Parser | Break a link into protocol, host, port, path, parameters and fragment | URL, Query, Host |
| URL Redirect Checker | Follow a link’s 301, 302, 307 and 308 redirect chain to its final destination | 301, 302, SEO |
| Extract Query Parameters | Pull every query string parameter into a table, JSON or CSV | URL → JSON |
| Compare URLs | Find how two links differ: host, path and every parameter | URL, Diff |
Frequently Asked Questions
Is my code or data sent to a server?
No. The JSON, minify, format, Markdown and CSS tools run in your browser. You can use them with work data without it leaving your computer.
What is the difference between minifying and formatting?
Minifying removes spaces, line breaks and comments so the file weighs less in production. Formatting does the opposite: it adds indentation and line breaks so the code is readable.
Is there a usage limit?
The CSS generators are free with no limit. For the rest you can try free with one document, and validation errors do not count as a use. ToolStudio Pro gives unlimited use.
