Developer Tools
Professional web developer utilities operating 100% offline. Parse user agents, format payloads, validate YAML structures, convert formats, or compare file diffs. All converters and tools process documents completely client-side. Your files never leave your computer.
Available Tools
JSON Formatter
Format, beautify and pretty-print JSON online. Validate JSON syntax, choose indentation, copy formatted output and process data locally in your browser.
JSON Validator
Check your JSON structure for errors and parse issues. Highlights missing commas, unquoted keys, and structural mismatches with precise line numbers.
CSS Minifier
Compress CSS codes by removing comments and spaces to optimize speed.
CSS Beautifier
Format and indent your CSS code blocks with custom tabs or spacing. Make minified stylesheets readable and align layouts instantly.
JS Minifier
Compress and minify JS files to decrease load times.
JS Beautifier
Format and beautify obfuscated or minified JavaScript code blocks. Cleans indentation, brackets, and line breaks safely in-browser.
XML Formatter
Indent and structure raw XML trees with clean node spacing.
SQL Formatter
Format SQL query statements online. Align SELECT, INSERT, JOIN clauses on new lines. Supports offline beautifying for SQL, MySQL, and PostgreSQL.
CSV to JSON
Convert raw tabular CSV data into clean structured JSON object arrays in-browser. Supports custom headers and operates fully offline for privacy.
JSON to CSV
Convert structured JSON object arrays into downloadable CSV files instantly. Supports custom escaping for commas and quotes to avoid syntax errors.
Markdown to HTML
Convert Markdown headers, bold styles, tables, and blocks into standard HTML tags instantly. Fully secure local processing.
HTML to Markdown
Translate standard HTML blocks back to simple Markdown notation.
Base64 Encoder
Encode plain text strings into base64 ASCII character strings offline. Supports Unicode and multi-byte character translations safely.
Base64 Decoder
Decode base64 ASCII character strings back to readable plain text. Safe local decoding handles multi-byte UTF-8 structures.
URL Encoder
Encode query parameter strings to make them safe for web URLs. Safely escapes reserved characters, spaces, and percent sequences.
URL Decoder
Decode percent-encoded URL links and query strings back to plain readable text safely in your web browser.
HTML Entity Encoder
Convert special text characters into safe HTML character entities.
HTML Entity Decoder
Decode HTML character entities back to standard text characters.
Binary to Text
Translate base-2 binary byte blocks back to readable text strings.
Text to Binary
Translate text strings into base-2 binary byte sequences.
Morse Code Translator
Encode standard text into Morse code signals, and decode them back.
Roman Numeral Converter
Convert base-10 digits to Roman numerals and decode them back.
MD5 Generator
Compute a standard 128-bit MD5 signature hash for verification checks.
SHA-256 Generator
Compute a secure 256-bit SHA-256 integrity signature hash value.
Hash Generator
Compute MD5, SHA-1, SHA-256, and SHA-512 cryptographic checksum hash signatures simultaneously offline in your web browser.
Diff Checker
Compare two text blocks side-by-side highlighting line and word shifts.
String Escaper
Escape quote marks and slashes to make text safe for code inclusion.
UUID Generator
Generate bulk secure random RFC4122 v4 UUID identifiers.
User Agent Parser
Parse browser user-agent header strings revealing browser, OS and device brands.
Epoch Converter
Convert Unix epoch timestamps to dates and vice versa.
Regex Tester
Test regular expressions highlighting matching string boundaries.
DNS Lookup
Query public Cloudflare DNS servers to check domain records.
WHOIS Record Lookup
Query WHOIS RDAP records to see domain ownership data.
IP Lookup & Geolocation
Locate geolocation details, city, country, and ISP coordinates of any IP address.
Port Scanner
Check connectivity status of host network ports client-side.
URL Slug Generator
Convert strings to lowercased URL friendly slugs.
JWT Decoder
Inspect and decode JWT headers, payloads, and signatures instantly.
YAML Formatter
Format, parse, and validate YAML spacing indentations in-browser.
YAML Validator
Verify YAML syntax format rules client-side with error logs.
JSON to YAML Converter
Translate JSON data arrays into clean indented YAML structures.
YAML to JSON Converter
Translate YAML configurations back to JSON data structures.
XML to JSON Converter
Translate XML tags into JSON objects client-side.
HTML Formatter
Format, align, and prettify nested HTML layouts offline.
HTML Minifier
Minify and compress HTML strings by removing spaces and comments.
Cron Expression Parser
Parse 5-field cron scheduling lines into human readable descriptions.
URL Parser & Query Mapper
Parse URL protocols, hosts, paths, and query string keys in tables.
UUID Validator
Validate format pattern of UUID keys client-side.
JSON to TypeScript Converter
Translate JSON schemas into autogenerated TypeScript interface models.
Markdown Previewer
Write, edit, and preview Markdown rich text formatting with a live side-by-side HTML compiler and preview canvas in-browser.
JSON Diff / Comparer
Compare two JSON documents and find added, removed, changed and type-different values with an easy side-by-side JSON comparison tool.