UniversalCodeStudio is a free collection of 64 developer tools. Learn who builds it, how your input is processed on our server, and how advertising and sign-ups work.
UniversalCodeStudio is a free website with 64 developer tools in 4 categories: formatters and minifiers for JSON, HTML, CSS, JavaScript, SQL and XML; converters between JSON, YAML, XML, Markdown and CSS preprocessors; encoders and decoders for Base64, URLs and HTML entities; generators for UUIDs, QR codes, barcodes, hashes and meta tags; and everyday text utilities.
Every tool has its own page with a short explanation, step-by-step usage, an example input and output, known edge cases and answers to common questions. A knowledge base of longer technical articles covers JSON, SQL, web security, APIs, testing and architecture.
UniversalCodeStudio is an independent project, built and maintained by its developer rather than by a large company. Bug reports and tool suggestions sent through the Contact page are read by the person who writes the code.
When you click a tool’s action button, the text in the editor is sent over an encrypted HTTPS connection to our server, processed in memory, and the result is sent straight back to your browser. We do not save, log or cache that input or output, and there is no database table for tool input.
If you use “Upload File”, the file is read by your browser and its text is then processed the same way as pasted text. If you use “Load URL”, our server downloads that URL on your behalf and returns its contents to the editor.
Like any web host, our server may keep standard access logs (IP address, page address, time and browser type) for security and troubleshooting. Those logs do not contain what you type into the tools. Even so, avoid pasting live production secrets such as private keys or passwords into any online tool, including this one.
Every tool works without an account, and there is no paid tier. The site currently does not display ad units. Ad network scripts load only if advertising is explicitly enabled in server configuration; they are not loaded by default.
You are welcome to link to any tool page from articles, documentation or course material. If a tool gives a wrong result, please send the input that caused it through the Contact page so it can be fixed.
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