JSON tools
Format, validate, and minify
JSON Formatter & Validator
Format, validate, pretty print, minify, copy, and download JSON locally in your browser without uploading developer data.
Semantic structural comparison
JSON Diff & Compare
Compare two JSON documents locally and identify added, removed, and changed values with readable paths and type-aware semantics.
Local structured-data conversion
JSON to CSV Converter
Convert a JSON object or array of objects to UTF-8 CSV locally, with nested-object flattening and spreadsheet formula protection.
Format, validate, and minify XML
XML Formatter
Format, validate, minify, copy, and download XML locally in your browser without uploading source data.
Format inert HTML source text
HTML Formatter
Format or minify HTML source locally without rendering scripts, fetching referenced resources, or uploading the markup.
Format SQL without executing it
SQL Formatter
Format and compact common SQL statements locally in your browser without connecting to or executing against a database.
Convert structured text locally
CSV to JSON Converter
Convert RFC-4180-style CSV to JSON locally with quoted fields, embedded newlines, delimiter choices, and string-safe values.
Hash Generator
Generate SHA-256, SHA-384, or SHA-512 text digests locally with the browser Web Crypto API.
HTML Entity Encoder & Decoder
Encode common HTML-sensitive characters or decode named and numeric HTML entities as inert local text.
Hex to Text Converter
Convert UTF-8 text to hexadecimal bytes or decode hexadecimal bytes into strict UTF-8 text locally.
Query String Parser & Builder
Parse duplicate-preserving query parameters or build a percent-encoded query string locally.
CSS Gradient Generator
Build validated linear, radial, or conic gradients with a live preview and copy-ready CSS.
Color Mixer
Blend two HEX colors with a controlled sRGB channel ratio and copy the resulting HEX and RGB values.
Tint & Shade Generator
Generate predictable 10% through 90% tints and shades from a base HEX color.
CSS Box Shadow Generator
Configure offsets, blur, spread, color, opacity, and inset state for copy-ready box-shadow CSS.
Encoding, conversion, and identifiers
Encoding and decoding
Base64 Decoder & Encoder
Decode Base64 or Base64URL to inert UTF-8 text and encode Unicode text locally.
Epoch and date conversion
Unix Timestamp Converter
Convert explicit Unix seconds or milliseconds to dates and structured dates back to timestamps.
Exact BigInt conversion
Hex to Decimal Converter
Convert hexadecimal integers, including large values, to exact decimal output.
Exact BigInt conversion
Decimal to Hex Converter
Convert whole decimal integers to uppercase or lowercase hexadecimal output.
Cryptographic identifiers
UUID Generator
Generate one or up to 100 random UUID v4 values with secure browser cryptography.
UTF-8 text and bytes
Binary Translator
Translate text to UTF-8 binary bytes or decode valid UTF-8 binary bytes back to text entirely in your browser.
Exact integer conversion
Binary to Decimal Converter
Convert signed binary integers to exact decimal integers with browser-local BigInt arithmetic and no precision loss.
Exact integer conversion
Decimal to Binary Converter
Convert signed decimal integers to exact binary integers locally with arbitrary-precision BigInt conversion.
CSS color conversion
Hex to RGB Converter
Convert 3- or 6-digit hexadecimal colors to RGB channel values and a CSS rgb() value locally in your browser.
Design and security utilities
Browser-local utility
Color Picker
Choose a color and convert between HEX, RGB, and HSL values locally in your browser.
Design and security utilities
Browser-local utility
Password Generator
Generate a cryptographically random password locally with selectable character types and no storage or network request.
Color design utility
Browser-local utility
Color Palette Generator
Generate a 3–8 color random, complementary, analogous, triadic, or monochromatic palette and copy HEX or CSS values.
Reference, validation, and network utilities
Browser-local utility
ASCII Table
Browse and filter all 128 seven-bit ASCII codes with decimal, hexadecimal, binary, octal, symbols, and control descriptions.
Browser-local utility
Subnet Calculator
Calculate an IPv4 subnet mask, wildcard, network, broadcast, host range, and address counts from an address and CIDR prefix.
Browser-local utility
Color Contrast Checker
Calculate the contrast ratio between two HEX colors and compare it with WCAG 2.x AA and AAA text thresholds.
Browser-local utility
URL Decoder & Encoder
Decode or encode URL components and complete URLs locally with clear percent-encoding modes and malformed-input errors.
Inspect, test, and transform source
Local inspection and conversion
JWT Decoder
Decode a JWT header and payload locally without uploading the token or claiming to verify its signature.
Local inspection and conversion
Regex Tester
Test JavaScript regular expressions locally with match positions, capture groups, flags, and a bounded worker timeout.
Local inspection and conversion
YAML Formatter
Conservatively clean YAML line endings, trailing spaces, and blank lines locally without executing or uploading content.
Local inspection and conversion
Markdown to HTML
Convert common Markdown headings, paragraphs, lists, emphasis, code, and safe HTTP links to inert HTML source locally.
Strict, predictable processing
Inputs are handled as data with strict parsers and native browser APIs. They are never evaluated as code.