Developer Tools

92 tools in this category

• ADB Command & Dev Options Studio

  Toggle Android developer options visually: Layout Bounds, GPU Overdraw, Stay Awake, StrictMode, and Pointer Location with one-click ADB shell scripts.

• WebAssembly IDE

  Run Python, JS, and more natively in the browser via WASM. No installs — execute code instantly.

• Base64 Encoder/Decoder

  Encode text to Base64 or decode Base64 strings — full UTF-8 support, entirely in your browser.

• JSON Formatter

  Beautify, minify, and validate JSON instantly. Surfaces the parser's own syntax errors as you type.

• JWT Decoder

  Decode JWT headers and payloads locally — claims pretty-printed, expiry checked. Signature verification stays on your backend.

• Unix Timestamp Converter

  Convert Unix epoch timestamps to readable dates and back. Supports ms and seconds.

• UUID Generator

  Generate cryptographically random version 4 UUIDs in bulk. Copy each with one click.

• URL Encoder/Decoder

  Encode special characters for safe URL usage, or decode percent-encoded strings.

• Token Counter

  Estimate tokens for current OpenAI, Claude, Gemini, Llama, and Mistral models. Exact BPE is labeled where available.

• Regex Tester

  Test regular expressions with live match highlighting, match counts, and replacement previews.

• Cron Translator

  Translate cron expressions to plain English, validate fields, and preview the next 5 run times.

• XML Formatter & Validator

  Beautify, minify, and validate XML documents. Highlights malformed tags and syntax errors.

• HTML Formatter & Beautifier

  Format messy or minified HTML with proper indentation. Copy production-ready markup instantly.

• JSONPath Evaluator

  Run JSONPath expressions against JSON data. Visualize matching nodes and arrays instantly.

• cURL → Fetch Converter

  Convert cURL commands to JavaScript Fetch, Axios, or Python requests code automatically.

• Chmod Calculator

  Build Linux file permissions visually with owner/group/public checkboxes and special bits. Get octal and symbolic notation.

• JSON Tree Viewer

  Explore JSON as a collapsible tree with typed values, array/object counts, and one-click JSONPath-style copy.

• DNS Lookup (DoH)

  Query A, AAAA, MX, TXT, NS, and CNAME records through Cloudflare's encrypted DNS-over-HTTPS resolver.

• My IP & Network Details

  See the IPv4/IPv6 addresses, ISP, country, and timezone that websites observe when you visit them.

• Fake Data Generator

  Generate realistic test users - names, emails, phones, addresses - as JSON, CSV, or SQL INSERT statements for demos and test databases.

• Keycode Inspector

  Press any key to see its keyCode, key name, code, and event properties live in the browser.

• robots.txt Generator

  Build robots.txt files visually. Control Googlebot, Bingbot, and crawl delays with a UI.

• Sitemap XML Generator

  Create XML sitemaps from a list of URLs with priority, change frequency, and last-modified dates.

• SQL Formatter

  Format and indent SQL queries with proper indentation and keyword casing. Dialect-neutral.

• Data Format Converter

  Convert data between JSON, CSV, and YAML formats with pretty-print and download options.

• URL Slug Generator

  Convert titles or phrases to clean, hyphenated, URL-safe slugs for SEO and routing.

• URL Decoder

  Decode percent-encoded URL strings back to readable text. Handles all RFC 3986 escapes.

• Diff Checker

  Visual side-by-side code/text comparison using Monaco diff engine. Highlights added and removed lines.

• Mermaid Diagram Editor

  Live editor for architecture and flowchart diagrams using Mermaid.js. Export as SVG instantly.

• Base64 & URL Encoder/Decoder

  Instant bidirectional Base64 and URL encoding/decoding. Supports full UTF-8 including emoji.

• Number Base Converter

  Convert integers between binary, octal, decimal, and hexadecimal in real time.

• HTTP Status Code Reference

  Searchable reference for every HTTP status code — 1xx to 5xx — with descriptions and use cases.

• YAML Validator & Formatter

  Validate YAML syntax, auto-format indentation, and convert YAML to JSON instantly.

• CSV Table Editor

  Paste CSV and edit it as a spreadsheet table. Add/remove rows and columns, then export.

• JSON to CSV Converter

  Flatten JSON arrays to CSV with auto-detected headers. Handles nested objects.

• Visual Cron Builder

  Build cron schedules interactively with dropdowns for minute, hour, day, month, and weekday.

• ASCII & Unicode Table

  Browse and search the full ASCII and Unicode reference. Copy characters by name or code point.

• ENV File Validator

  Validate .env files for missing keys, duplicate entries, and empty values. Compare local vs example.

• Changelog Generator

  Generate Keep a Changelog entries from commit messages. Supports semantic versioning format.

• README Generator

  Scaffold professional README.md files with badges, sections, and table of contents from a form.

• Open Graph Preview

  Preview how your URL will appear when shared on Twitter, LinkedIn, and Slack. Edit OG tags live.

• IP Subnet Calculator

  Calculate network address, broadcast, host range, and CIDR notation for IPv4 subnets.

• TOML Validator & Formatter

  Validate TOML syntax and format with proper indentation. Convert between TOML and JSON.

• JSON to TypeScript

  Generate typed TypeScript interfaces from any JSON — nested objects, arrays, and unions handled automatically.

• Code Minifier (CSS/JS/HTML)

  Minify CSS, JavaScript, or HTML in your browser — strips comments and collapses whitespace safely, showing the size saved.

• Query String Parser & Builder

  Split any URL into base, path, hash, and decoded query parameters — see the JSON form of every parameter.

• User-Agent Parser

  Decode browser, engine, OS, and device class from any User-Agent string — useful for support tickets and analytics.

• URL Extractor

  Pull every URL out of any text — logs, markdown, emails — or list unique hosts only.

• CSV to JSON Converter

  Convert CSV to clean JSON with an RFC 4180 parser — quoted fields, embedded commas, and type casting handled.

• JSON Escape / Unescape

  Escape raw text into a JSON string literal, or unescape one back — newlines, quotes, and unicode handled.

• YAML ⇄ JSON Converter

  Convert simple YAML configs to JSON and back — nested maps, inline arrays, booleans, and numbers preserved.

• What Is My Screen Size

  Live viewport, screen resolution, DPR, Tailwind breakpoint, timezone, and hardware info for debugging.

• JSON to TypeScript & Zod Studio

  Paste arbitrary JSON and generate strongly typed TypeScript interfaces, types, and Zod validator schemas.

• SVG to React / Vue / JSX Converter

  Convert raw SVG markup into production-ready React (JSX/TSX), Vue 3, or Svelte component with customizable props.

• OpenGraph & Social Card Simulator

  Live real-time preview of page metadata on Google, Twitter/X, Facebook, and Discord with copy-paste meta tags.

• SQL Schema to TypeScript & Prisma

  Convert SQL CREATE TABLE DDL schemas into TypeScript interfaces, Prisma models, and Knex migrations.

• IP Subnet & CIDR Mask Calculator

  Calculate network address, broadcast, usable host range, CIDR mask, and total IP capacity for any IPv4 block.

• Docker Compose Stack Builder

  Visually configure multi-service containers (Node, Postgres, Redis, Mongo, Nginx) and export docker-compose.yml.

• cURL to Python / Go / Rust / Fetch Code

  Convert cURL commands into JavaScript fetch/axios, Python requests, Go net/http, and Rust reqwest code.

• Docker Run ↔ Docker Compose Converter

  Convert docker run CLI commands to docker-compose.yml files and vice versa with environment, volume, port, and network parsing.

• Git Command Studio & Cheatsheet

  Interactive command builder and troubleshooter for undoing commits, interactive rebasing, stashing, and branch workflows.

• ULID Generator

  Generate Universally Unique Lexicographically Sortable Identifiers — timestamp-prefixed, Crockford Base32, monotonically sortable.

• NanoID Generator

  Generate compact, URL-safe, cryptographically strong unique IDs with configurable alphabet and length (default 21 chars).

• IBAN Validator & Parser

  Validate International Bank Account Numbers with checksum verification, country detection, and BBAN structure breakdown.

• JSON ↔ XML Converter

  Convert JSON objects to well-formed XML and parse XML documents back to JSON with configurable root element and indentation.

• JSON ↔ TOML Converter

  Bi-directional conversion between JSON and TOML formats with proper type mapping for dates, arrays, and nested tables.

• YAML ↔ TOML Converter

  Convert between YAML and TOML configuration formats while preserving comments, types, and nested structure.

• XML → JSON Converter

  Parse XML documents into clean JSON trees with configurable attribute handling, text nodes, and array detection.

• JSON Minify / Compact

  Strip all whitespace from JSON to produce the smallest possible payload — shows byte savings and compression ratio.

• JSON → Go Struct Generator

  Generate idiomatic Go structs with proper json tags, type inference, nested struct extraction, and optional omitempty.

• JSON → Java Class Generator

  Generate Java POJOs or Records from JSON samples with proper types, getters/setters, and Jackson/Gson annotations.

• JSON → Kotlin Data Class

  Generate Kotlin data classes from JSON with nullable types, default values, and kotlinx.serialization annotations.

• JSON → Python Dataclass

  Generate Python @dataclass or TypedDict definitions from JSON samples with proper type hints and Optional fields.

• JSON → Rust Struct (Serde)

  Generate Rust structs with #[derive(Serialize, Deserialize)] and proper serde attributes from JSON samples.

• JSON → GraphQL Type Definitions

  Generate GraphQL type definitions from JSON objects with proper scalar mapping, nested types, and nullable fields.

• HTML → JSX Converter

  Convert raw HTML to valid JSX — transforms class→className, for→htmlFor, self-closing tags, inline styles, and event handlers.

• HTML → Pug / Jade Converter

  Convert HTML markup to Pug (Jade) template syntax with proper indentation, attribute formatting, and text content.

• Math Expression Evaluator

  Evaluate mathematical expressions with variables, functions (sin, cos, log, sqrt), constants (π, e), and unit conversions.

• JavaScript Benchmark Runner

  Compare JavaScript snippet execution speeds with ops/sec, relative performance, and statistical confidence intervals.

• HTML WYSIWYG Editor

  Rich text editor with formatting toolbar — outputs clean HTML. Bold, italic, lists, links, images, tables, and code blocks.

• JSON Schema Validator

  Validate JSON data against JSON Schema (Draft 4/6/7/2019-09/2020-12) with detailed error messages and path highlighting.

• .htaccess Generator

  Generate Apache .htaccess rules for redirects, rewrites, HTTPS enforcement, caching headers, Gzip compression, and security headers.

• Nginx Config Generator

  Generate Nginx server block configurations for reverse proxy, static files, SSL/TLS, rate limiting, and caching with best practices.

• JSON Path Finder

  Click any node in a JSON tree to get its JSONPath, jq filter, JavaScript accessor, and Python dict path — with copy buttons.

• YAML → JSON Schema Generator

  Generate JSON Schema from YAML sample data with automatic type inference, required fields, and nested object support.

• GraphQL → TypeScript Types

  Generate TypeScript interfaces and types from GraphQL schema definitions with proper nullable handling and enum support.

• Fake REST API / Mock Data Generator

  Generate realistic mock JSON API responses — users, products, posts, addresses, payments — with configurable schemas and counts.

• Hex Dump / Hex Editor

  View and edit file bytes as hexadecimal with ASCII sidebar, offset navigation, byte search, and binary diff highlighting.

• Base32 Encode / Decode

  RFC 4648 Base32 encoding and decoding with standard and hex alphabets, padding control, and binary input support.

• Base58 Encode / Decode

  Bitcoin-style Base58 and Base58Check encoding/decoding for addresses, transaction IDs, and binary-to-text conversions.

• CRC Checksum Calculator

  Calculate CRC-8, CRC-16, CRC-32, CRC-32C, and Adler-32 checksums for text and file inputs with hex and decimal output.

• Gzip / Deflate Compress & Decompress

  Compress and decompress data with Gzip and Deflate algorithms in-browser using the Compression Streams API — shows ratios.