Converters

• Temperature Converter — Convert between Celsius, Fahrenheit and Kelvin instantly.
• Free Online JSON Formatter — Paste your JSON, then format, validate or minify it. 100% browser-side processing.
• Character Converter (ASCII / Unicode / UTF-8) — See the ASCII code, Unicode code point and UTF-8 bytes for every character in your text.
• URL Encode / Decode — Encode or decode text in the format used inside URLs (percent-encoding).
• HTML Encode / Decode — Convert special characters into HTML entities and back.
• Base64 Encode / Decode — Convert text to Base64 and back, with full UTF-8 support (accents, emoji).
• Color Converter (HEX, RGB, HSL, HSB, CMYK) — Pick a color or type a value in any format — every other field updates automatically.
• Number Base Converter — Convert a number between binary, octal, decimal and hexadecimal instantly.
• JWT Decoder — Paste a JWT and see the decoded header and payload, formatted as JSON.
• Unix Timestamp Converter — Convert between Unix timestamp (seconds since 1970) and a readable date.
• Case Converter — Convert a text between camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE and more.
• String Escape — Convert a text into an escaped string (\n, \", \\) ready to embed in code, and back.
• Slug Generator — Convert a title or phrase into a clean slug, ready to use in a URL.
• CSV ↔ JSON Converter — Convert data from CSV to JSON or from JSON to CSV, processed locally in your browser.
• Regex Tester — Type a pattern and a text — matches are highlighted in real time.
• Diff Checker — Paste two texts and see exactly what changed between them, line by line.
• Code Formatter — Paste minified/messy JavaScript, CSS or HTML and format it with readable indentation.
• SQL Formatter — Paste a single-line SQL query and format it with readable indentation.
• YAML ↔ JSON Converter — Convert config files between YAML and JSON, processed locally in your browser.
• XML ↔ JSON Converter — Convert data between XML and JSON, processed locally in your browser.
• Subnet Calculator (CIDR) — Enter an address in CIDR notation (e.g. 192.168.1.0/24) and see every detail of the subnet.
• User-Agent Parser — Paste a User-Agent string (or use your own browser's) and see the identified browser, OS and device.
• Cron Expression Explainer — Type a cron expression and see what it means in plain English.
• Sort & Remove Duplicate Lines — Paste a list of lines and sort, deduplicate, or remove blank lines.
• Roman Numeral Converter — Convert a decimal number (1 to 3999) to Roman numerals, or the other way around.
• WCAG Contrast Checker — Pick a text color and a background color and see if the contrast is accessible.
• Time Zone Converter — Pick a date/time, the source zone and the target zone, and see the conversion — accounting for daylight saving time when it applies.
• Color Palette Generator — Create harmonious color palettes from a base color, using color theory.
• CSS Gradient Generator — Build linear or radial gradients and copy the ready-made CSS code.
• CSS Box Shadow Generator — Visually adjust your element's shadow and copy the ready-made CSS code.
• CSS Border Radius Generator — Adjust each corner rounding individually and copy the ready-made CSS code.
• Random Color Generator — Generate one or several random colors in hex, RGB or HSL format.