Developer & Data
Format JSON, convert CSV, encode Base64 and URLs, test regex safely, generate UUIDs and hashes.
All Developer & Data
Every tool runs 100% locally in your browser with zero server uploads.
JSON Formatter and Validator
Format, validate, and minify JSON data with precise line/column syntax error detection.
CSV to JSON and JSON to CSV Converter
Convert data between CSV and JSON with support for quoted strings, custom delimiters, and Unicode.
Base64 Text Encoder and Decoder
Encode plain text to Base64 and decode Base64 back to text with full UTF-8 Unicode support.
URL Encoder and Decoder
Encode and decode URLs with clear distinction between query parameters and full URLs.
HTML Entity Encoder and Decoder
Convert special characters to safe HTML entities and decode entities back to readable text.
Regex Tester
Test regular expressions with flags, highlighted matches, capture groups, and ReDoS safety timeouts.
UUID Generator
Generate cryptographically secure Version 4 UUIDs (GUIDs) individually or in bulk.
File and Text Hash Generator
Compute cryptographic hashes (SHA-256, SHA-1, SHA-384, SHA-512, MD5) for text and local files.
HTML & CSS Minifier / Beautifier
Minify HTML and CSS code to reduce file transfer size, or beautify minified code with clean indentation.
Cron Expression Generator & Explainer
Build cron schedules with interactive dropdowns, human-readable English descriptions, and upcoming execution previews.
SQL Query Formatter & Beautifier
Format messy, unindented SQL statements into clean, structured queries with capitalized reserved keywords.
UNIX Timestamp Converter & Epoch Timer
Convert between human-readable calendar dates and UNIX epoch timestamps in seconds and milliseconds with live clock.
cURL to Fetch & Python Converter
Convert cURL command-line requests into clean JavaScript fetch, Axios, Python requests, and Node.js code snippets.
YAML to JSON & JSON to YAML Converter
Convert YAML configuration files into JSON and transform JSON data into clean, formatted YAML with syntax validation.
XPath Tester & XML Evaluator
Evaluate XPath 1.0/2.0 expressions against XML and HTML documents with matched node counts and attribute inspection.
HTML Table to Markdown Converter
Convert HTML <table> elements and copied spreadsheet tables into clean GitHub Flavored Markdown (GFM) tables.
Linux Chmod Permissions Calculator
Calculate Linux/Unix file permissions with visual checkboxes for Owner, Group, and Others with octal and symbolic modes.
Color Space Converter (HEX, RGB, HSL, CMYK)
Convert colors between HEX, RGB, RGBA, HSL, HSLA, and CMYK color spaces with live swatch and alpha opacity controls.
GraphQL Query Formatter & Minifier
Format, beautify, and minify GraphQL queries, mutations, subscriptions, and schema definitions with syntax validation.
User Agent Parser & Client Inspector
Analyze and decode any browser User-Agent string into Browser, Engine, Operating System, Device Model, and Architecture.
Cron Expression Builder, Explainer & Next Run Schedule
Build standard 5-part and 6-part cron expressions with a visual schedule picker, translate crons into plain human English, and calculate next 10 execution timestamps.
HTML Table to JSON & CSV Data Extractor
Extract structured data from raw HTML table markup or scraped web tables into clean JSON objects, arrays of objects, or downloadable CSV files.
Interactive Regular Expression Tester & Cheat Sheet
Test JavaScript RegExp patterns in real-time with live match highlighting, capture group extraction, flags selector (g, i, m, s, u), and quick-reference syntax cheat sheet.
HTTP Status Codes Reference & Diagnostic Directory
Instant search and diagnostic reference for all RFC standard HTTP response status codes (1xx, 2xx, 3xx, 4xx, 5xx) with client/server causes and fix recommendations.
File to Base64 Data URI & Binary File Reconstructor
Convert any local file (PDF, PNG, SVG, MP3, WOFF2 font) into clean Base64 Data URI strings for HTML/CSS embedding, or decode Base64 back to downloadable files.
JSON to TypeScript Interface & Type Generator
Instantly convert nested JSON payloads and API responses into clean, strictly typed TypeScript interfaces (`interface` / `type`) with optional JSDoc comments.
XML to JSON & JSON to XML Bidirectional Formatter
Convert XML feeds and SOAP payloads to modern JSON structures, or convert JSON objects into well-formed, indented XML with custom root wrappers.
UUID v4 & GUID Batch Generator (Bulk Export)
Generate cryptographically secure RFC 4122 Version 4 UUIDs & Microsoft GUIDs in bulk. Customize uppercase, lowercase, hyphens, braces `{...}`, and quote formatting.
JWT Debugger & Token Inspector
Decode JSON Web Tokens (JWT) with color-coded claims, human expiration dates, and offline HMAC signature verification.
Crontab Builder & Plain-English Explainer
Visually construct crontab schedules or translate any 5-part cron expression into plain English with next execution times.
JSON to TypeScript & Zod Generator
Instantly convert raw JSON sample data into strict TypeScript interfaces, types, and runtime Zod validation schemas.
HTML Entity Encoder & Decoder
Encode special characters to HTML entities (&, <, >) or decode entities back to readable text for safe web content embedding.
SVG to CSS Data URI & Base64 Converter
Convert raw SVG code into URL-encoded or Base64 CSS background-image data: URIs, HTML src strings, and clean React JSX components.
cURL to Python Requests & JavaScript Fetch Converter
Convert cURL terminal commands into production-ready Python (requests / httpx), JavaScript (fetch / axios), and Node.js code with headers and JSON body.
JWT Signer, Verifier & Secret Inspector
Verify JSON Web Token cryptographic signatures using Web Crypto HMAC SHA-256, inspect token claims and expiration, or generate signed JWT tokens locally.
BBCode to HTML Converter
Convert forum BBCode markup ([b], [url], [img], [quote], [code]) into semantic HTML5 code.
HTML Tags Remover Tool
Strip all HTML, XML, SVG, and script tags from rich text or web source code, leaving clean plain text.
HTML Entity Converter
Encode special characters into HTML entities (&, <, >, ') and decode entities back to plain characters.
URL Parser & Query Inspector
Deconstruct any web URL into its protocol, hostname, port, path, anchor, and query parameter key-value table.
File MIME Type & Magic Bytes Checker
Inspect file header magic numbers and bytes to identify true MIME types regardless of file extension.
JavaScript Minifier & Compressor
Minify and compress JavaScript code by removing comments, whitespace, and formatting for production deployment.
URL Decoder Tool
Decode percent-encoded URI components (%20, %2F, %3F, %26) and query strings into human-readable characters.
ASCII Converter Tool
Convert ASCII text to decimal, hex, binary, and HTML character entity codes with complete 128-character ASCII reference table.
UUID v4 Generator Tool
Generate cryptographically secure RFC 4122 Version-4 UUIDs and GUIDs individually or in bulk with uppercase and hyphen controls.
HTML Minifier & Compressor
Minify and compress HTML code by stripping comments, collapsing whitespace, and optimizing tags.
JSON Validator & Beautifier
Validate JSON syntax, detect parsing errors, and beautify with custom indentation and formatting.
SQL Formatter & Beautifier
Beautify and format messy SQL queries with uppercase keywords and clean clause indentation.
Markdown to HTML Converter
Convert Markdown to semantic HTML markup with real-time live preview and code export.