Developer Tools

Paste JSON data to make it easier to read and inspect. Indentation reveals nested objects and arrays clearly, which is useful for APIs, configuration files, debugging and data review.

Compress formatted JSON into a compact representation by removing indentation and extra whitespace. Useful when reducing payload size, preparing API requests or storing JSON more efficiently.

Encode plain text as Base64 for use in data transfer, configuration, development or testing. Base64 is an encoding format, not encryption, and should not be used to protect sensitive information.

Paste a Base64 string to recover the original text it represents. Useful when inspecting encoded API values, configuration data, tokens or development payloads.

Convert spaces, accented characters and reserved symbols into URL-safe percent encoding. Useful for query parameters, redirects, API requests and dynamically generated links.

Decode URL-encoded strings such as %20 or accented-character sequences into their readable form. Useful for inspecting query strings, copied links and API parameters.

Create UUID values for records, test data, application objects or development work. Generate several identifiers at once when you need unique values for multiple items.

Enter a Unix timestamp to see its corresponding date, or provide a date to obtain Unix seconds. Useful for APIs, logs, databases, scheduling and debugging time-based data.

Escape characters such as <, > and & so HTML markup can be shown without being interpreted by the browser. Useful for documentation, tutorials, code examples and safe text display.

Decode entities such as &lt;, &gt; and &amp; into readable symbols. Useful when working with escaped markup, copied source code, exported content or encoded text.

Minify CSS for a more compact stylesheet by removing spacing and formatting that browsers do not need. Useful before deployment, when testing snippets or reducing transferred text size.

Create a lighter version of straightforward JavaScript for quick testing or small snippets. This is a lightweight minifier and is not intended to replace a full production build tool for complex code.

Enter a HEX colour such as #1a73e8 or RGB values to convert between the two common web colour formats. Useful for CSS, design systems, prototypes and frontend development.

Enter text to calculate its SHA-256 digest as a hexadecimal value. Useful for development, integrity checks, test data and comparing whether two inputs produce the same hash.

Enter a regex pattern, optional flags and test content to see which parts match. Useful while developing validation rules, parsers, search patterns and text-processing logic.

Paste JSON data to verify its syntax. NuvaTools reports whether the document is valid and displays useful error information when parsing fails. Your data stays in your browser.

Paste valid JSON to display objects, arrays, strings, numbers, booleans and null values in a clear hierarchical tree. Processing is performed locally in your browser.

Paste valid JSON and convert it to XML. Objects become nested elements and arrays are represented as repeated item elements. Processing is entirely local.

Paste valid XML to convert it to JSON. Repeated sibling elements are represented as arrays and XML attributes are preserved. Processing stays entirely in your browser.

Paste YAML to convert mappings, lists, numbers, booleans and null values into formatted JSON. Your data is processed locally in the browser.

Paste valid JSON to convert objects, arrays, strings, numbers, booleans and null values into YAML. Processing is performed locally in your browser.

Paste an SQL query to automatically format indentation, line breaks and common SQL keywords. Processing is performed locally in your browser.

Paste XML to add consistent indentation and line breaks while preserving its structure. Processing takes place locally in your browser.

Paste HTML to automatically organize tags, indentation and line breaks. Formatting runs locally in your browser and your source code is not uploaded.

Paste JavaScript to automatically organize indentation, blocks and line breaks. Formatting runs locally in your browser and your source code is not uploaded.

Paste a JWT to decode its header and payload. Optionally provide an HS256 shared secret or an RS256 public key to verify the signature. Without a key, NuvaTools only decodes the token and does not claim it is authentic. Processing stays locally in your browser.

Paste Markdown to convert it into HTML instantly. The conversion is performed locally in your browser without uploading your content.