Developer Tools

65 tools

Essential developer productivity tools including JSON formatting, Base64 encoding, regex testing, and code utilities. Built for speed and privacy.

JSON Formatter & Minifier

Beautify or minify JSON instantly with recursive key sorting, auto-repair for syntax errors, and structural analysis.

JSON Validator

Validate JSON syntax with line-number error pinpointing and clear diagnostic descriptions.

JSON Minifier

Strip whitespace and comments from JSON to minimize payload size with real-time byte comparison.

Base64 Encode/Decode

Encode and decode Base64 strings with full Unicode support via TextEncoder.

Base32 Encode/Decode

Encode and decode Base32 with RFC 4648, Base32Hex, Crockford Base32, and Z-base-32 support.

Chmod Calculator

Calculate Linux file permissions in octal and symbolic notation with a visual terminal preview.

Code Diff Tool

High-precision code comparison with syntax highlighting, side-by-side view, and sync scrolling.

URL Encode & Decode

Professional URL workbench with RFC 3986 support, deep decoding, and interactive parameter extraction tables.

Query Params to JSON

Parse URL query parameters into structured JSON with nested keys, array detection, and bi-directional conversion.

HTML Entity Escape & Unescape

Encode or decode HTML entities instantly with full HTML5 coverage, supporting named, decimal, and hexadecimal formats.

Hash Generator

Compute SHA-1, SHA-256, and SHA-512 digests via the Web Crypto API.

UUID Generator

Generate RFC 9562 compliant UUID v4 and v7 identifiers in bulk.

ULID Generator

Generate, decode, and compare ULIDs with monotonic ordering, anatomy view, time travel, and UUID conversion.

Random Port Generator

Generate bias-free random TCP/UDP ports with IANA service lookup, conflict risk assessment, and batch export.

Lorem Ipsum Generator

Configurable placeholder text — paragraphs, sentences, or word count with HTML output.

JSON Diff

Find structural differences between two JSON objects with color-coded output.

JSON to XML Converter

Transform JSON structures to well-formed XML with proper escaping.

JSON to YAML Converter

Convert JSON to clean, readable YAML instantly with recursive key sorting and flow level control.

YAML to JSON Converter

Convert YAML to structured JSON instantly. Supports multi-document streams, recursive key sorting, and NDJSON output.

XML to JSON Converter

Parse XML into clean JSON — preserves attributes and nested elements.

XML Formatter

Beautify or minify XML data instantly with syntax highlighting, comment stripping, and real-time validation.

YAML Prettify

Normalize YAML indentation and convert between JSON and YAML formats.

YAML Validator

Validate YAML syntax with line-number error pinpointing and JSON preview.

SQL Formatter

Indent and beautify SQL queries — supports MySQL, PostgreSQL, SQLite, and T-SQL.

SQL Minifier

Compress SQL queries by removing comments and collapsing whitespace while safely preserving string literals.

XML Minifier

Compress XML by removing comments, collapsing whitespace, and merging empty tags while preserving CDATA and text content.

XML Validator

Validate XML well-formedness with line-number error pinpointing and structural analysis.

HTML Formatter

Beautify or minify HTML5 code instantly with nested CSS/JS support and real-time structural analysis.

CSS Formatter & Minifier

Beautify, format, or minify your CSS code instantly. Sort properties alphabetically and optimize file size.

CSS Validator & Linter

Validate your CSS code against W3C standards instantly. Detect syntax errors, invalid properties, and malformed values.

Professional CSV Viewer

Open and analyze large CSV/TSV files with a virtualized grid, column sorting, advanced filtering, and real-time statistics.

cURL to Code Converter

Instantly convert cURL commands into ready-to-use code for Python, JavaScript, Go, PHP, and more. Uses a secure WASM parser.

Docker Compose Converter

Convert between Docker Run commands and Docker Compose files instantly. Supports multiple services and advanced configurations.

Markdown Preview & Editor

Real-time GFM previewer with KaTeX math rendering, synchronized scrolling, and automated document outline.

Markdown to HTML Converter

Convert Markdown to clean, sanitized HTML with GFM tables, task lists, strikethrough, and downloadable standalone files.

SVG Viewer & Previewer

Preview, inspect, and convert SVGs with DOMPurify sanitization, JSX export, minification, and zoom controls.

Mock Data Generator

Build custom schemas and generate thousands of realistic fake records as JSON, CSV, SQL, or TSV using Faker.js with locale support.

Professional Email Normalizer

Normalize email addresses by removing dots and plus aliases for Gmail, Outlook, iCloud, and more. Includes MX record lookup for business domains. 100% private.

GraphQL Explorer

Interactive GraphQL client with schema introspection, query editor, variables panel, and CORS proxy.

GraphQL Formatter

Format, beautify, and validate GraphQL queries, mutations, and schemas (SDL) instantly. 100% private, client-side formatting with syntax error detection.

Interactive HTML Editor

A professional HTML/CSS/JS playground with real-time preview, Emmet support, console logging, and external library integration. 100% private and client-side.

Professional HTML Minifier

Minify HTML, CSS, and JavaScript with our professional-grade compressor. Supports attribute stripping, comment removal, and advanced Terser optimization.

HTML to Markdown Converter

Convert HTML to clean Markdown instantly. Supports GitHub Flavored Markdown (GFM), tables, task lists, and customizable formatting styles. 100% private.

Professional HTML Validator

Validate your HTML code against industry standards. Detect syntax errors, missing tags, and accessibility violations instantly. 100% private, client-side analysis.

JavaScript Formatter & Minifier

Beautify or minify your JavaScript code instantly with Prettier and Terser. Supports ESNext, TypeScript, JSX, and recursive formatting. 100% private.

JavaScript Minifier & Bundler

Minify, bundle, and tree-shake JavaScript and TypeScript code instantly. Uses high-performance esbuild-wasm for industrial-grade optimization. 100% private.

JavaScript Obfuscator

Secure your JavaScript code with advanced obfuscation. Features control flow flattening, string encryption, dead code injection, and anti-debugging protection. 100% private.

JSON String Escape & Unescape

Instantly escape or unescape JSON strings. Features language-specific literal generation for JavaScript, Java, C#, Python, and Swift. 100% private.

JSON Flatten & Unflatten

Flatten nested JSON objects into dot notation or unflatten them back. Supports custom delimiters, array handling, and circular reference detection. 100% private.

JSON Schema Generator

Generate high-quality JSON Schemas from your data instantly. Supports Draft 7, automatic type inference, required field toggles, and AJV validation. 100% private.

JSON to CSV Converter

Convert JSON files to CSV or Excel formats instantly. Supports massive files via streaming, deep flattening, custom delimiters, and column filtering. 100% private.

JSON to TOML Converter

Convert JSON to clean, human-readable TOML 1.0.0. Features smart key reordering, multi-line string support, and automatic type inference. 100% private.

JSON to TSV Converter

Convert JSON to high-performance TSV (Tab-Separated Values). Features Excel-safe escaping, UTF-8 BOM injection, and column filtering. 100% private.

JSON to TypeScript & Zod

Transform JSON to production-ready TypeScript interfaces or Zod schemas instantly. Supports discriminated unions, JSDoc, and recursive nesting. 100% private.

JSONL Validator & Repair

Validate and repair massive JSON Lines (.jsonl) files. Features streaming validation for 100MB+ files, per-line error tracking, and one-click data cleaning. 100% private.

JSONPath Expression Tester

Test and debug JSONPath expressions in real-time. Supports JSONPath-Plus, custom variables, multiple output modes (Path, Value, Pointer), and safe evaluation. 100% private.

Online Regex Tester

Test and debug regular expressions with real-time match highlighting, capture groups, substitution preview, and ReDoS protection.

JavaScript Benchmark Builder

Compare JavaScript code snippet performance with precision timing, warmup cycles, and statistical analysis including ops/sec, mean, median, and standard deviation.

Online XPath Tester

Test and debug XPath expressions against XML documents with real-time evaluation, namespace discovery, and multiple result views.

HAR File Viewer & Analyzer

Visualize HTTP Archive files with a waterfall chart, timing breakdown, request filtering, and header inspection for network performance analysis.

WebSocket Tester & Debugger

Connect to WebSocket servers, send and receive messages, inspect JSON payloads, and monitor connection statistics in real time.

OpenAPI Validator

Validate OpenAPI 3.0 and 3.1 specifications. Paste or upload JSON/YAML and get structured error reports with path locations and fix suggestions.

RSS to JSON

Convert RSS and Atom feed XML into structured JSON. Paste feed XML to extract articles, metadata, and media content in a clean JSON format.

HTTP Headers Analyzer

Analyze HTTP response headers for any URL with security scoring (A+ to F), CSP policy visualization, and missing header recommendations.

API Tester

Send HTTP requests to any REST API with custom headers and body. Includes a CORS proxy for cross-origin requests, response timing, and request history.