# KopivoDev: The Ultimate Developer Toolkit

KopivoDev is a professional-grade, browser-native developer toolkit — and a core pillar of the Kopivo Suite. Every formatting, conversion, and inspection operation runs entirely client-side. No API calls. No telemetry. No server ever sees your code.

The developer toolkit that respects your code like it respects your privacy. No uploads, no servers, 100% local.

🌐 Official Website: dev.kopivo.com

🔗 Part of the Kopivo Ecosystem

🚫 The Problem with Online Developer Tools

Developers rely daily on browser-based formatters, converters, and inspectors — but most of these tools operate with a dangerous blind spot:

Source Code Exposure: Pasting proprietary schemas, SQL queries, JWTs, or environment configs into a third-party tool means that code has left your environment — permanently.
Token Leakage: JWT decoders and API tools that operate server-side can silently log the tokens and secrets you paste into them.
Telemetry Creep: Many "free" dev tools monetize usage patterns, keystrokes, and content fingerprints via background analytics.
Latency Tax: Round-tripping a JSON blob or SQL query to a remote server for formatting adds unnecessary latency to every single workflow.

KopivoDev eliminates the server, eliminating every one of these risks.

⚙️ How KopivoDev Works

KopivoDev runs every operation natively inside the browser using standard Web APIs, JavaScript parsers, and lightweight WebAssembly modules — with zero server involvement.

Browser-Native Execution: Formatting, parsing, diffing, and conversion run entirely in the JavaScript engine of your browser — no network requests required.
Real-Time Processing: Operations execute on each keystroke with zero latency, since there is no round-trip to eliminate.
Data Sovereignty: Your source code, configs, tokens, and schemas never leave your device's memory.
Zero-Footprint: When the tab closes, all processed data is automatically wiped from volatile memory.
Svelte 5 + Runes: The UI is built with Svelte 5's reactivity system (Runes), delivering a fast, lightweight, zero-overhead interface.

🛠️ Available Local Tools — 16 Modules

🗂️ Data & Formats — 4 modules

Tool	Description
JSON Formatter	Parse, validate, and pretty-print complex JSON structures with syntax highlighting and error detection.
JSON to TypeScript	Automatically infer and generate TypeScript interfaces and type definitions from any JSON object.
YAML Converter	Losslessly transform data between YAML and JSON formats with full spec compliance.
SQL Formatter	Beautify and reindent SQL statements — SELECT, JOIN, subqueries — for maximum readability.

🎨 UI & Styling — 4 modules

Tool	Description
SVG Optimizer	Strip unnecessary metadata, comments, and redundant nodes from SVG source to minimize file weight.
CSS to Tailwind	Convert standard CSS property declarations into their equivalent Tailwind utility class notation.
Responsive Tester	Render any URL simultaneously across multiple viewport sizes to audit responsive layout behavior.
Font Pairer	Preview and pair Google Fonts typefaces live to evaluate typographic combinations for your interface.

🔧 Code & Logic — 4 modules

Tool	Description
Diff Comparator	Detect and highlight line-by-line differences between two code blocks or text documents in real time.
Regex Tester	Write, test, and debug regular expressions with live match highlighting and capture group inspection.
Cron Generator	Build and validate cron expressions visually, with a human-readable schedule preview.
Slug Generator	Transform any title or string into a sanitized, SEO-friendly URL slug.

🌐 Web & Protocol — 4 modules

Tool	Description
JWT Decoder	Inspect, decode, and locally validate JSON Web Token headers, payloads, and signature metadata.
HTTP Codes	Complete reference of HTTP status codes with descriptions, use cases, and RFC context.
DNS Lookup	Query live DNS records — A, AAAA, CNAME, MX, TXT — for any domain without leaving the browser.
ENV Template	Generate structured `.env.example` configuration templates for any project stack.

🧰 Tech Stack

Layer	Technology
UI Framework	Svelte 5 (Runes reactivity system)
Parsing Engine	Browser-native JS parsers (JSON, RegExp, URL API)
Type Generation	Client-side TypeScript AST inference
Diff Engine	Myers diff algorithm, compiled to WebAssembly
SVG Optimization	SVGO-equivalent logic running in a Web Worker
DNS Queries	DNS-over-HTTPS (DoH) via public resolvers — no custom backend
File I/O	Browser File API + Blob URL download
Styling	Scoped Svelte styles + CSS custom properties
Distribution	Static CDN — zero backend, zero database

🛡️ Privacy & Security Protocol

KopivoDev operates on a No-Log, No-Cloud mandate across all 16 tools:

Local Intake: All code, tokens, schemas, and configs are accessed exclusively via the browser's DOM and File API. Nothing is transmitted.
In-Memory Processing: Formatting, parsing, and conversion operations run inside sandboxed Web Workers. The main thread only receives the rendered output.
No Token Logging: The JWT decoder never transmits the tokens you inspect. Decoding is performed entirely by the browser's atob() and JSON parser.
Transparent DNS: DNS lookups use DNS-over-HTTPS with public resolvers. KopivoDev has no custom DNS backend and retains no query logs.
Instant Output: Downloads are triggered via local Blob URLs. No data is ever sent to a backend.

🔗 The Kopivo Ecosystem

KopivoDev is one pillar of the broader Kopivo privacy-first productivity suite:

Product	Focus	URL
Kopivo PDF	PDF management & editing	pdf.kopivo.com
Kopivo Media	Video & audio processing	media.kopivo.com
Kopivo Security	Cryptography & privacy tools	security.kopivo.com
Kopivo Dev	Developer toolkit	dev.kopivo.com

💬 Support & Contribution

KopivoDev is built to make development faster, cleaner, and private by default.

Star this Repo: Help developers find a trustworthy, server-free alternative to common online tools.
Spread the Word: Share with frontend engineers, backend developers, and security-conscious teams.
Feedback: Reach out via dev.kopivo.com for feature requests or technical inquiries.

kopivo/PrivateDev