Fast, In-Browser Developer Utilities & Code Formatters
KitWharf Developer Tools empower software engineers, DevOps practitioners, and backend developers to debug, format, convert, and inspect code in real time. Because all processing executes 100% locally in your web browser, confidential API keys, proprietary database queries, and private payloads are never transmitted to any third-party server.
JSON Formatter & Schema Diff
Format, repair, diff, and inspect JSON in real time. Convert to TypeScript, Go structs, YAML, CSV tables, and JSON Schema.
Interactive Regex Tester & Explainer
Test regular expressions with real-time match highlighting, cheat sheet presets, and plain-English pattern explanations.
Unix Timestamp & Epoch Converter
Convert Unix timestamps to human-readable UTC/local dates and dates to epoch seconds or milliseconds. Live clock, millisecond precision, and batch conversion.
Cron Expression Generator & Explainer
Generate, validate, and translate crontab expressions into plain English. Interactive visual builder, next execution schedule preview, and presets.
Text & Code Diff Checker
Compare text, code, or JSON files side-by-side or inline with character-level diff highlighting. 100% private in-browser comparison.
SQL Formatter & Beautifier
Format, beautify, minify, and validate SQL queries in real time. Convert SQL INSERT statements to JSON data. 100% private in-browser tool.
CSV to JSON & TSV Converter
Convert CSV/TSV to JSON and JSON arrays to CSV. Auto-delimiter detection, nested object flattening, and live table preview.
Subnet & CIDR IP Calculator
Calculate IPv4/IPv6 subnets, network/broadcast addresses, usable host ranges, and binary netmasks. Slice subnets with VLSM.
CSS Box Shadow & Glassmorphism Generator
Design multi-layer smooth CSS box shadows and frosted glassmorphism cards in real time. Instant copy for CSS, Tailwind, and React.
URL Encoder, Decoder & Query Parser
Encode and decode URLs, inspect UTM parameters, edit query strings in an interactive table, and convert strings to RFC 3986 percent encoding.
cURL to Code Multi-Language Converter
Convert cURL command lines into JavaScript (Fetch, Axios), Python (Requests, HTTPX), Go, PHP, and Rust code instantly.
HTML & XML Formatter & Minifier
Format, beautify, and minify HTML5 and XML markup with customizable indentations and tag hierarchy preservation.
WCAG Color Contrast & Accessibility Checker
Check color contrast ratios for WCAG 2.1 AA and AAA accessibility compliance, simulate color blindness vision, and auto-fix low contrast text.
Number Base & Bitwise Converter
Convert between Decimal, Binary, Hexadecimal, and Octal simultaneously with BigInt precision, two's complement, 8/16/32-bit masks, and ASCII decoding.
CSS Gradient Generator & Mesh Designer
Design linear, radial, and conic CSS gradients with multi-stop color pickers, rotation dials, preset themes, and ready Tailwind CSS exports.
OpenGraph & Social Meta Tag Previewer
Generate SEO meta tags and preview pixel-perfect social share cards for Google Search, Twitter / X, Facebook, LinkedIn, and Discord.
HTML Entity Encoder & Decoder
Encode and decode special characters into named HTML5 entities, decimal codepoints, and hexadecimal values with an interactive symbol lookup palette.
JSON to YAML & YAML to JSON Converter
Convert between JSON and YAML bidirectionally in your browser. Features live syntax validation, custom 2/4-space indentation, and DevOps presets for Kubernetes and Docker.
Chmod Permissions Calculator & Command Builder
Interactive Linux chmod calculator. Convert between octal numbers (755, 644, 600) and symbolic strings (-rwxr-xr-x) with SUID, SGID, Sticky bit, and security presets.
Developer Tools Architecture & Usage Guide
Why Client-Side Privacy Matters for Developers
Modern developers frequently need to paste production JSON payloads, database schema dumps, cron expressions, and sensitive configuration files into online formatters. Traditional web utilities send your snippets to remote backend servers, risking data leakage, compliance violations (such as SOC 2 and GDPR), and accidental token exposure.
KitWharf eliminates this security risk entirely. Every tool in this suite runs strictly within your browser's V8 or JavaScript runtime using HTML5 Web APIs, Web Workers, and WebAssembly. You can disconnect your internet connection entirely, and every formatter, converter, and validator will continue to execute seamlessly without interruption.
Supported Code Formats and Transformations
Our developer tools cover everyday engineering workflows: real-time JSON validation with syntax error highlighting, bidirectional CSV and JSON matrix transformations, multi-dialect SQL beautification (PostgreSQL, MySQL, SQLite, T-SQL), standard 5-part cron scheduling predictions, unified and split Myers diff checking, and microsecond-precision Unix epoch conversions.
Related Guides & Tutorials for Developer Tools
Regex for Non-Programmers: Find and Replace on Steroids
Regular expressions look like alien scratch, but the core is learnable in 15 minutes. Learn the handful of symbols that cover 90% of real searches, with examples anyone can use.
JSON Formatting, Validation, and Common Syntax Errors (And How to Fix Them)
Understand JSON syntax rules, debug common parser errors like trailing commas and unquoted keys, and learn how to generate TypeScript types directly from JSON payloads.
Understanding Unix Timestamps, Epoch Time, and the Year 2038 Problem
A complete guide to Unix epoch timestamps, how operating systems store time, converting seconds and milliseconds, and how systems are preparing for Y2038.
How to Write, Read, and Debug Cron Expressions: A Sysadmin & Developer Guide
Master standard crontab syntax, understand the 5 fields, explore common schedule patterns, and avoid production scheduling mistakes.
Frequently Asked Questions
100% In-Browser Privacy
All developer tools operate strictly inside your device memory. No files, code snippets, tokens, or personal inputs are ever sent to remote servers.