UUtilityApp
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File & Data Converters

Convert between data formats instantly — JSON, CSV, XML, YAML, Base64, colors, number bases and more. No upload, no signup.

29 free tools · no sign-up · works in your browser

Color

Number Base

JSON Formatter & Validator

Format, beautify and validate JSON with proper indentation and instant error messages. Paste minified JSON and get clean, readable output.

Base64 Decode

Decode Base64 back into readable text, with full Unicode support.

URL Decoder

Decode percent-encoded (%20, %2F …) URLs and query strings back into plain text.

URL Encoder

Percent-encode text and query parameters so they're safe to use in URLs.

JSON to CSV Converter

Convert a JSON array of objects into clean CSV ready for Excel or Google Sheets — column headers detected automatically.

HTML Entity Decoder

Convert HTML entities like & and < back into their original characters.

Base64 Encode

Encode text or UTF-8 strings to Base64 instantly. Unicode-safe encoding right in your browser.

Markdown to HTML Converter

Convert Markdown into clean HTML — headings, lists, links, bold, italics, code and more.

CSV to JSON Converter

Convert CSV data into a JSON array of objects. The first row becomes the keys; quotes and commas are handled.

XML to JSON Converter

Convert XML into structured JSON in your browser — attributes and nested elements supported.

JSON Minifier

Minify JSON by removing all whitespace to shrink payload size for APIs and configs.

YAML to JSON Converter

Convert YAML configuration into JSON. Supports nested maps, lists and scalars.

JSON to YAML Converter

Convert JSON into clean, indented YAML for Kubernetes, CI configs and more.

HTML Entity Encoder

Escape <, >, & and quotes into HTML entities so code displays as text instead of rendering.

JSON to XML Converter

Convert a JSON object into well-formed XML markup.

More tools coming soon

Validated, high-intent tools from our research catalog that are on the build roadmap.

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