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Fast, privacy-first developer utilities. Built with a local-first architecture where data never leaves your browser runtime. Zero uploads, zero accounts.

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Comprehensive Catalogue

All Developer Tools

Search and filter across 103 local-first utilities for data formatting, cryptographic inspection, typography, and media conversions.

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JSON Formatter

Beautify, indent, validate, and structure messy JSON data.

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JSON Validator

Validate JSON syntax and pinpoint syntax error line numbers.

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JSON Minifier

Compress JSON by stripping unnecessary whitespaces and newlines.

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JSON Diff Viewer

Compare two JSON payloads side-by-side with visual delta highlights.

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JSON Tree Viewer

Visualize, search, and navigate nested JSON in an interactive tree view.

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JSON to TypeScript

Generate TypeScript interfaces and type definitions from JSON payloads.

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JSON to YAML

Convert structured JSON data into clean YAML syntax.

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YAML to JSON

Parse YAML configuration strings into formatted JSON objects.

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XML Formatter

Beautify, indent, and format XML and HTML documents.

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XML to JSON

Convert XML tags and attributes into equivalent JSON objects.

json
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CSV to JSON

Transform CSV rows and tabular data into JSON arrays of objects.

json
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JSON to CSV Converter & Table Viewer

Transform JSON arrays and nested objects into clean CSV spreadsheets and data tables.

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JSON Schema Generator

Generate Draft-07 and 2020-12 JSON Schema definitions from data samples.

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Mock Data Generator Studio

Generate synthetic test datasets for Users, E-Commerce, and Financial Transactions in JSON, CSV, SQL, or TypeScript.

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SQLite In-Browser Studio

Inspect SQLite databases, browse schemas, run queries, and export data with zero server uploads.

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SQL Formatter

Beautify, format, and indent SQL queries for PostgreSQL, MySQL, and BigQuery.

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Timestamp Converter

Convert Unix epoch timestamps to human-readable dates and UTC times.

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Number Base Converter

Convert numbers across Binary, Octal, Decimal, and Hexadecimal bases.

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JWT Decoder

Decode and inspect JSON Web Tokens without sending keys to any server.

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Base64 Encode / Decode

Encode and decode standard and URL-safe Base64 strings with UTF-8 support.

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URL Encode / Decode

Encode and decode URI strings and URL component query parameters.

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URL Parser

Deconstruct URLs into protocol, origin, host, port, path, and query params.

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Query String Parser

Parse and serialize URL query parameters into JSON and key-value pairs.

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UUID Generator

Generate cryptographically secure v4, v7, and v1 UUIDs in bulk.

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ULID Generator

Generate Universally Unique Lexicographically Sortable Identifiers.

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Nano ID Generator

Generate compact, URL-friendly unique IDs with custom alphabets.

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Hash Generator

Compute SHA-1, SHA-256, SHA-384, SHA-512, and MD5 cryptographic hashes.

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Regex Tester

Test regular expressions with real-time match highlighting and capture groups.

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Cron Expression Builder

Build, parse, and explain cron expressions in plain English.

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cURL Builder & Converter

Construct cURL commands and export them to Fetch, Python, and Node.js.

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API Request Composer

Compose and dispatch HTTP requests directly from your browser runtime.

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HTML Entity Encoder / Decoder

Escape and unescape HTML special entities, tags, and Unicode characters.

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Diff Checker

Compare text, code, or configuration files with highlighted diff views.

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Code Formatter

Format JavaScript, TypeScript, CSS, HTML, and Markdown cleanly.

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Environment Variable Formatter

Format, sort, validate, and redact `.env` environment files.

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QR Code Studio & Barcode Generator

Generate custom QR codes for Wi-Fi, vCards, URLs, and emails with custom colors and vector SVG / PNG export.

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DNS-over-HTTPS (DoH) Record Inspector

Inspect DNS records (A, AAAA, CNAME, MX, TXT, NS, SOA, CAA) with Cloudflare & Google DoH in-browser.

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CIDR Subnet & IPv4 Network Calculator

Calculate network range, broadcast, usable host IPs, Cisco wildcard, and 32-bit binary breakdown.

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HTTP Status Codes Explorer & RFC Guide

Searchable 1xx-5xx HTTP status code reference with RFC citations, caching rules, and framework snippets.

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GraphQL Studio & Query Prettifier

Format, minify, and analyze GraphQL queries with mock JSON synthesizer and TypeScript type generator.

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Local

RSA & ECDSA Key Pair Generator

Generate secure cryptographic RSA (2048-4096b) and ECDSA (P-256/384/521) key pairs with PEM, JWK, and live sandbox testing.

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OpenSSL Command Generator & TLS Cheatsheet

Generate secure OpenSSL commands for CSRs, self-signed SAN certs, cert inspections, and PFX conversions.

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HTML to JSX & React Component Converter

Transform raw HTML and SVG markup into valid React JSX with automatic attribute camelCasing.

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Backslash String Escape & Unescape

Escape and unescape string literals with backslashes, quotes, and Unicode for JSON, JS, Python, and SQL.

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HTML / CSS / JS Live Previewer & Sandbox

Interactive real-time sandbox editor with live iframe preview and console logger.

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X.509 SSL & TLS Certificate Decoder

Decode X.509 PEM certificates, inspect issuer details, track expiration countdown, and audit SANs.

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Hex to ASCII & Text to Hex Converter

Bidirectional conversion between plain text, hexadecimal, binary, and decimal byte arrays.

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HAR Network Waterfall Analyzer

Inspect HTTP Archive (HAR) network logs with interactive waterfall charts, status codes, and request timings.

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Local

Cron Expression Visualizer & Timeline

Human-readable translations, 24-hour visual heat timeline, and next upcoming execution schedules for cron expressions.

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Local

Regex Visual Diagram & Railroad Generator

Interactive SVG railroad diagram generator and structural token inspector for regular expressions.

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Markdown Live Split Editor

Live split-view markdown editor with instant HTML rendering, formatting toolbar, and multi-format export.

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Word Counter

Real-time count of words, characters, sentences, paragraphs, and reading time.

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Character Counter

Calculate exact character length, UTF-8 bytes, and whitespace breakdown.

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Reading Time Calculator

Estimate precise reading and speaking durations for blogs and documentation.

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Case Converter

Transform text between camelCase, snake_case, kebab-case, PascalCase, and more.

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Slug Generator

Generate clean, URL-safe slugs with diacritic removal and custom separators.

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Lorem Ipsum Generator

Generate customizable dummy placeholder text, sentences, and paragraphs.

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Text Diff

Inspect word-by-word and character differences between two text snippets.

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Text Cleaner & Deduplicator

Strip duplicate lines, trim whitespace, remove blank rows, and unquote text.

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Find and Replace

Search and replace plain text or regular expressions with live preview.

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Unicode Inspector

Inspect Unicode codepoints, UTF-8/UTF-16 encodings, and character entities.

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Password Generator

Generate cryptographically secure passwords and passphrases locally.

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Password Strength Checker

Evaluate entropy, crack time estimates, and vulnerability patterns.

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Text Line Sorter, Deduplicator & Cleaner

Sort lines naturally or alphabetically, remove duplicates, trim whitespace, and clean data payloads.

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Design System Studio

Design, preview, and export full design token systems: color ramps, typography, and spacing.

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Color Converter

Convert colors between HEX, RGB, HSL, HSV, OKLCH, and CMYK formats.

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Color Palette Generator

Generate harmonious color schemes: analogous, complementary, and triadic.

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Contrast Checker

Check WCAG 2.1 AA and AAA color contrast accessibility compliance.

design
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CSS Gradient Generator

Design linear, radial, and conic CSS gradients with live preview.

design
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Box Shadow Generator

Build smooth, realistic multi-layered CSS box shadows with live preview.

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CSS Glassmorphism & Procedural Noise Studio

Generate frosted glass UI surfaces with backdrop blur, refraction, and SVG procedural noise.

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CSS Clamp Calculator

Calculate fluid typography and spacing with CSS clamp() functions.

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SVG Optimizer & Code Minifier

Clean up SVG files, remove editor metadata, round float precision, and preview visual diffs.

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SVG Previewer

Render and test SVG code live with zoom, dimensions, and background toggles.

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CSS Clip-Path & Polygon Generator Studio

Interactive visual polygon maker with draggable control points, shape presets, and Tailwind / CSS export.

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Tailwind CSS ↔ Vanilla CSS Converter

Bi-directional converter between Tailwind CSS utility classes and clean standard Vanilla CSS with live preview.

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CSS Grid & Responsive Bento Studio

Interactive responsive CSS grid architect with viewport simulator, bento presets, and HTML/CSS/Tailwind export.

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CSS Flexbox Playground & Layout Studio

Interactive visual flexbox playground with direction, alignment, wrap controls, child item rules, and HTML/Tailwind export.

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CSS Keyframes & Micro-Animations Studio

Interactive visual cubic-bezier timing curve and CSS keyframes builder with trending animation presets.

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Fluid Mesh & Aurora Gradient Studio

Design interactive multi-point fluid mesh gradients with ambient drift motion, film grain, and CSS/SVG export.

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CSS Animated Border & Neon Glow Studio

Architect Linear-style rotating conic gradient borders, traveling shimmer beams, and 8-point organic blob cards.

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CSS Pattern & Background Noise Generator

Synthesize vector dot matrices, blueprint cyber grids, isometric 3D mesh, and analog film grain textures.

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Neumorphism & 3D Clay Surface Studio

Design tactile soft-extruded UI elements, concave buttons, sunken cavities, and 360° dynamic light source shadows.

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Local

Image Compressor

Compress JPEG, PNG, and WebP images locally with quality sliders.

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Image Resize Tool

Resize images by specific pixel dimensions or percentage with aspect ratio lock.

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Crop Tool

Crop photos visually with preset aspect ratios (16:9, 4:3, 1:1).

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Image Format Converter

Convert images between WebP, PNG, JPEG, and AVIF formats.

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Image Metadata Viewer

Inspect file dimensions, MIME type, color depth, and camera EXIF data.

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EXIF Remover

Strip GPS location, camera model, and personal EXIF metadata from photos.

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Base64 Image Converter

Convert images to Data URI Base64 strings and preview Base64 image tags.

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Dominant Color Extractor

Extract primary color palettes and dominant HEX codes from any uploaded image.

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Favicon & App Icon Generator Studio

Generate multi-resolution browser favicons, Apple touch icons, and Android PWA icons with live mockups.

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PDF Metadata Viewer

Inspect PDF document title, author, creation date, and page counts.

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Image-to-PDF Converter

Convert PNG and JPEG images into clean, downloadable PDF documents.

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Merge PDF

Combine multiple PDF documents into a single unified PDF file.

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Split PDF

Split a multi-page PDF into separate single-page documents or page ranges.

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Rotate PDF

Rotate PDF pages 90°, 180°, or 270° and save corrected files.

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Extract PDF Pages

Select and extract individual pages from a PDF into a targeted document.

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cURL to Multi-Language Code Converter

Parse raw cURL commands and export to Fetch, Axios, TypeScript, Python, Go, Rust, and PHP.

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SQL Table to TypeScript, Zod & Prisma Studio

Compile SQL CREATE TABLE DDL into TypeScript interfaces, Zod schemas, Prisma models, and Go structs.

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WebSocket & SSE Live Stream Inspector

Test WebSocket (ws/wss) and Server-Sent Events (SSE) connections with live frame inspector and ping latency tracker.

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Linux Chmod & Permissions Calculator

Interactive POSIX permission matrix. Calculate Octal (755, 644), Symbolic (rwxr-xr-x), SUID, SGID, and CLI commands.

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Docker Run to Docker Compose Converter

Convert docker run CLI commands into clean, standard docker-compose.yml service configurations.

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