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JSON Formatter Data Format, validate, pretty-print, and minify JSON API responses, config files, logs, and webhook payloads directly in the browser without uploading data. ZIP Compressor and Extractor File Compress files into ZIP archives or extract ZIP contents in a browser-first workflow. PDF Merge File Merge multiple PDF files into one browser-prepared document for submissions, scans, estimates, contracts, and shareable packets. CSV to JSON Converter Data Convert CSV rows into JSON arrays for testing, migration, and quick data transformation. Password Generator Security Generate strong random password candidates with configurable length and character sets for accounts, password managers, and test environments. Regex Tester Developer Test JavaScript regular expressions against sample text to inspect matches, debug validation patterns, and refine text extraction rules. UUID Generator Developer Generate UUID values for test data, prototypes, and development workflows. JSON Editor Data Edit JSON values in the browser and keep structure visible while you work. JSON Tree Viewer Data Explore nested JSON in a readable tree view for faster data inspection. CSV Editor Data Inspect and edit CSV data in the browser before copying or exporting results. JSON Data Compare Data Compare JSON data structures and spot changes between two payloads. JSON to CSV Converter Data Convert JSON arrays into CSV tables that are easier to inspect or import. JSON to YAML Converter Data Convert JSON into YAML for configuration, documentation, and development workflows. CSV to YAML Converter Data Convert CSV rows into YAML blocks for data migration and configuration drafts. YAML Validator Data Check YAML indentation, tabs, key-value lines, and common syntax risks directly in your browser. HTML CSS JS Minifier Developer Minify HTML, CSS, and JavaScript snippets for quick optimization tests. HTML CSS JS Formatter Developer Format HTML, CSS, and JavaScript snippets so code is easier to read. SQL Formatter Data Format SQL queries for review, debugging, and documentation. robots.txt Generator Developer Create crawler allow and disallow rules plus sitemap references for a simple robots.txt file. URL Query Parser and Builder Developer Inspect a URL, edit query parameters as key-value rows, and rebuild a clean shareable link without sending it to a server. HTML Entity Encoder and Decoder Developer Encode reserved HTML characters into entities or decode entity text back into readable copy before publishing or testing markup. Environment File Sorter and Duplicate Checker File Sort environment variable samples, detect duplicate keys, and flag empty values before sharing configuration examples. XML to JSON Converter Data Convert XML data into JSON for API debugging and quick data transformation. JSON to XML Converter Data Convert JSON objects into XML markup for integration testing and data exchange. YAML JSON Converter Data Convert between YAML and JSON for configuration and documentation workflows. PDF Split File Split PDF documents into smaller files or selected page groups for sharing, cleanup, storage, and browser-first document preparation. Markdown to PDF File Convert Markdown content into a PDF-style document workflow in the browser. PDF OCR Text Extractor File Extract readable text from PDF pages for quick review and document cleanup. Base64 Encoder and Decoder Developer Encode plain text to Base64 or decode Base64 strings for API examples, configuration snippets, webhook samples, and development documentation. URL Encoder and Decoder Developer Encode and decode URL components, query strings, Korean text, spaces, redirect values, and campaign parameters for safer links and API tests. Hash Generator Security Generate common hashes for text values locally in your browser. HMAC Generator Security Generate HMAC values for sample messages and local development checks. JWT Decoder Security Decode JWT header and payload JSON in the browser to inspect claims, expiry timestamps, issuer values, and authentication debugging details. Unix Timestamp Converter Developer Convert Unix timestamps in seconds or milliseconds into readable dates, and convert dates back for logs, JWT expiry, APIs, and scheduled work. Cron Expression Builder Developer Build and inspect cron expressions for scheduled jobs and automation workflows. Password Strength Checker Security Password Strength Checker helps you check password strength indicators and review whether a password pattern looks too predictable. IP and Browser Info Checker Network Check visible IP, browser, and environment details for quick troubleshooting. DNS Record Lookup Network Look up DNS record information for domains and basic web operations checks. Subnet Mask Calculator Network Calculate subnet ranges and network values for quick networking references. Simple Port Scanner Network Simple Port Scanner helps you check simple port-style input and network reference notes for lightweight troubleshooting workflows. SVG Data URI Converter File Convert SVG markup into data URI values for CSS and HTML experiments. Favicon Generator File Create favicon assets for websites and quick prototype projects. Number Base Converter Developer Convert numbers between binary, decimal, hexadecimal, and other common bases. Random Dummy Data Generator Data Random Dummy Data Generator helps you generate random dummy values for testing forms, tables, mockups, and development examples.