Developer Tools
Format JSON, convert CSV/JSON, encode Base64, generate UUIDs, decode JWTs, compute hashes, and debug data with privacy-first developer tools.
Data Converters & Encoders
Transform data structures, serialization formats, and text encodings with zero server uploads.
Convert CSV to JSON Online
Convert CSV data into clean, formatted JSON in your browser. Supports custom delimiters, header detection, and nested dot-notation keys. 100% private.
Convert JSON to CSV Online
Convert JSON data into clean CSV spreadsheets in your browser. Flatten nested objects, configure delimiters, export for Excel with UTF-8 BOM. 100% private.
Online Base64 Encoder & Decoder
Encode and decode Base64 strings with full UTF-8 Unicode support. Free developer tool with instant swap, copy, and client-side processing.
Online URL Encoder & Decoder
Encode and decode URLs with full Unicode support. Convert special characters to percent-encoded format or decode encoded strings back to readable text — free, instant, and private.
Code Formatters & Minifiers
Clean, beautify, inspect, and compress code syntax locally.
Online JSON Formatter & Validator
Format, validate, prettify, and minify JSON data online. Free developer tool with syntax error highlighting, tree structure view, and 100% client-side privacy.
Online HTML Formatter (Beautifier & Minifier)
Format, beautify, and minify dirty HTML code online. Clean indentation (2/4 spaces or tabs), fix tag nesting, remove extra whitespace, and inspect compression statistics.
Online CSS Formatter (Beautifier & Minifier)
Format, beautify, and minify stylesheet CSS code online. Clean indentation, rule sorting, remove redundant comments, and compress CSS files instantly in your browser.
JavaScript Minifier & Beautifier (Online JS Compressor)
Minify and beautify JavaScript code online. Compress JS files by removing comments and whitespace, or format unreadable code with clean indentation. 100% private, zero execution.
Security & Identifiers
Cryptographic checksums, token inspectors, unique identifiers, timestamps, and design utilities.
Free Online UUID Generator
Generate cryptographically secure UUID v4 identifiers instantly in your browser. Create one or hundreds of random UUIDs using the Web Crypto API — free, private, no sign-up.
Online Hash Generator & Checksum Calculator
Generate cryptographic hashes for text and files using SHA-256, SHA-1, SHA-384, SHA-512, and MD5. Compute checksums instantly in your browser with the Web Crypto API — free and private.
Online JWT Decoder & Inspector
Decode JWT tokens instantly in your browser. View the header, payload, and claims of any JSON Web Token without sending it to a server — free, private, and secure.
Unix Timestamp Converter (Epoch to Date & Date to Epoch)
Convert Unix timestamps (seconds and milliseconds) to human-readable dates (UTC, Local, ISO 8601, RFC 2822) or convert dates to Unix Epoch time online with live clock.
Online URL Slug Generator
Generate clean URL slugs from any title or text. Preserves non-Latin scripts (Arabic, CJK, Cyrillic) and normalizes diacritics. Free online SEO tool.
Online Color Picker (HEX, RGB, HSL & Palette Generator)
Pick colors visually, extract hex codes from images, convert between HEX, RGB, HSL, HSV, CMYK, check WCAG contrast ratios, and copy CSS color values instantly.