Developer Utilities
Fast, private developer tools running 100% client-side in your browser. Zero tracking, zero cookies, and zero server data retention.
Showing 15 of 15 utilities
ATS Resume Keyword Matcher
Client-side ATS scanner. Compare your resume against any job description to discover missing keywords.
Text & Code Diff Checker
Compare two text or code files side-by-side or unified with exact line and token discrepancy detection.
Excel, CSV & JSON Converter
Convert bi-directionally between Excel (.xlsx), CSV, and JSON formats with live table previews.
JSON Formatter & Validator
Format, validate, beautify, and minify JSON data with instant syntax error pinpointing.
Base64 Encoder & Decoder
Convert text, UTF-8 strings, and binary files to and from Base64 with URL-safe encoding.
SQL Formatter & Beautifier
Beautify, indent, and format PostgreSQL, MySQL, and SQLite queries with keyword capitalization.
JWT Decoder & Inspector
Decode JSON Web Tokens client-side. Inspect headers, payload claims, and expiration countdown.
UUID / GUID Generator
Cryptographically secure v4 UUIDs. Generate individually or in bulk with custom formats.
URL Parser & Query Inspector
Deconstruct URLs and interactively edit, toggle, and build query string parameters.
Cron Expression Generator
Build, decode, and understand cron schedules with plain-English descriptions and next run timestamps.
Regex Tester & Matcher
Test regular expressions with real-time match highlighting, group capture extraction, and flag controls.
CSV / JSON Viewer & Converter
Inspect and parse CSV and JSON files into an interactive, sortable data table.
REST API Tester
Send lightweight HTTP requests, customize headers and payloads, and inspect real-time responses.
Online Code Runner
Execute JavaScript and TypeScript code in an isolated browser environment with live console capture.
HTML/CSS/JS Playground
Write HTML, CSS, and JavaScript with live sandboxed browser rendering and index.html export.