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, minify, and validate JSON with auto-repair for trailing commas and quotes, recursive key sorting, and structural analysis — all local.

JSON Validator

Validate JSON syntax with line-numbered errors, schema inference, Ajv-powered draft support, and one-click auto-fix for common syntax issues.

JSON Minifier

Minify JSON by stripping whitespace and comments to shrink payloads 20-40%. Real-time byte comparison shows exact savings — processed locally.

Base64 Encode/Decode

Encode and decode Base64 strings with full Unicode support via TextEncoder. Handles plain text and Data URIs instantly — all in your browser.

Base32 Encode/Decode

Encode and decode Base32 in four variants: RFC 4648, Base32Hex, Crockford, and Z-base-32. Instant conversion between text and Base32 locally.

Chmod Calculator

Calculate Linux file permissions in octal and symbolic notation with a visual permission matrix and terminal-style preview — runs fully local.

Code Diff Tool

Compare code side-by-side with syntax highlighting, line-level diffs, and synchronized scrolling. Myers algorithm precision — all processing stays local.

URL Encode & Decode

Encode and decode URLs per RFC 3986 with deep decoding, percent-encoding control, and an interactive parameter extraction table — fully local.

Query Params to JSON

Parse URL query strings into structured JSON with nested keys and array detection, then convert JSON back to a query string — fully local and private.

HTML Entity Escape & Unescape

Encode or decode HTML entities with full HTML5 coverage — named, decimal, and hexadecimal formats handled bidirectionally, all in your browser.

Hash Generator

Compute SHA-1, SHA-256, and SHA-512 digests for any text via the Web Crypto API with instant hex output — hashing runs entirely in your browser.

UUID Generator

Generate RFC 9562 compliant UUID v4 and v7 identifiers in bulk with CSPRNG randomness. Copy individually or export lists — created locally in-browser.

ULID Generator

Generate, decode, and compare ULIDs with monotonic ordering, anatomy breakdown, and two-way UUID conversion — all client-side, no server needed.

Random Port Generator

Generate bias-free random TCP/UDP ports with IANA service lookup, conflict risk scoring, and batch export for Docker environments — fully local.

Lorem Ipsum Generator

Generate Lorem Ipsum placeholder text by paragraphs, sentences, or exact word counts with optional HTML markup tags — produced in your browser.

JSON Diff

Find structural differences between two JSON objects with color-coded added, removed, and changed paths. Deep recursive comparison — fully local.

JSON to XML Converter

Transform JSON into well-formed XML with proper entity escaping, configurable root and element tags, and attribute mapping — processed in your browser.

JSON to YAML Converter

Convert JSON to clean, readable YAML with recursive key sorting and flow-level control for configs and manifests — processed in your browser.

YAML to JSON Converter

Convert YAML to structured JSON with multi-document stream support, recursive key sorting, and NDJSON output — processed entirely in your browser.

XML to JSON Converter

Parse XML into clean JSON while preserving attributes, nested elements, and namespaces. Handles SOAP, RSS, and config files — runs fully locally.

XML Formatter

Beautify or minify XML with syntax highlighting, comment stripping, and real-time validation. Handles SOAP and large documents — fully local.

YAML Prettify

Normalize YAML indentation and formatting instantly, then convert between YAML and JSON. Fixes inconsistent spacing — processed in your browser.

YAML Validator

Validate YAML syntax with line-numbered error pinpointing and a JSON structure preview. Multi-document support — checked entirely in your browser.

SQL Formatter

Indent and beautify SQL queries with dialect support for MySQL, PostgreSQL, SQLite, and T-SQL plus keyword casing options — fully local processing.

SQL Minifier

Compress SQL into a one-liner by removing comments and collapsing whitespace while safely preserving string literals — processed in your browser.

XML Minifier

Compress XML by removing comments and collapsing whitespace while preserving CDATA and text content. Optional empty-tag collapsing — fully local.

XML Validator

Validate XML well-formedness with line-numbered error pinpointing via DOMParser. Catches unclosed tags, bad nesting, and stray entities — local.

HTML Formatter

Beautify or minify HTML5 with nested CSS and JS formatting, comment stripping, and structural analysis — processed entirely in your browser.

CSS Formatter & Minifier

Beautify or minify CSS with alphabetical property sorting and support for nesting, container queries, and cascade layers — all in your browser.

CSS Validator & Linter

Validate CSS against W3C rules to catch syntax errors, invalid properties, and malformed values. Understands modern CSS and custom properties.

Professional CSV Viewer

Open CSV and TSV files with 1M+ rows in a virtualized grid with column sorting, advanced filtering, and real-time statistics — analyzed locally.

cURL to Code Converter

Convert cURL commands into production-ready Python, JavaScript, Go, Rust, PHP, Ruby, and Java code via a secure WASM parser — fully local processing.

Docker Compose Converter

Convert docker run commands to docker-compose.yml and back, merging multiple services with inferred ports, volumes, and networks — fully local.

Markdown Preview & Editor

Preview Markdown in real time with GFM tables, task lists, KaTeX math rendering, synchronized scrolling, and a document outline — fully local.

Markdown to HTML Converter

Convert Markdown to clean, sanitized HTML with GFM tables, task lists, and strikethrough. Preview live or download a standalone file — local.

SVG Viewer & Previewer

Preview, inspect, and convert SVG files with DOMPurify sanitization, JSX export, minification, dimension info, and zoom controls — all in your browser.

Mock Data Generator

Generate up to 10,000 fake records as JSON, CSV, SQL, or TSV from custom schemas. Faker.js engine with 10 locales — runs entirely in your browser.

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

Query any GraphQL API with schema introspection, a full query editor, variables panel, and built-in CORS proxy — runs entirely in your browser.

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 JavaScript code with advanced obfuscation: control flow flattening, string encryption, dead code injection, and anti-debugging — local.

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 JSONL/NDJSON files with streaming checks for 100MB+ inputs, per-line error tracking, and one-click cleaning — local.

JSONPath Expression Tester

Test JSONPath expressions in real time with JSONPath-Plus, custom variables, and Value, Path, and Pointer output modes — safe local evaluation.

Online Regex Tester

Test regular expressions in real time with match highlighting, capture groups, substitution preview, and ReDoS protection — all fully local.

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 XPath expressions against XML documents with real-time evaluation, namespace discovery, match highlighting, and multiple result views — local.

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 — browser-based.

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 2.0, RSS 1.0/RDF, and Atom feed XML into clean structured JSON with auto-format detection and article extraction — parsed locally.

HTTP Headers Analyzer

Analyze HTTP response headers for any URL with A+ to F security scoring, CSP visualization, and missing-header recommendations — fresh fetches.

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.