Interactive Developer Tools
29 free browser-based tools for everyday development tasks. Format, encode, generate, convert, and test — all running locally in your browser with no data sent to any server.
Formatters & Beautifiers
JSON Formatter
FormattersFormat, validate, and minify JSON data with syntax highlighting.
SQL Formatter
FormattersFormat and beautify SQL queries for better readability.
HTML Beautify/Minify
FormattersBeautify or minify HTML markup with customizable options.
CSS Beautify/Minify
FormattersFormat or compress CSS stylesheets instantly.
JavaScript Beautify/Minify
FormattersBeautify or minify JavaScript code with configurable settings.
XML Beautify/Minify
FormattersFormat or compress XML documents with proper indentation.
Markdown Preview
FormattersLive preview of Markdown with GitHub-flavored rendering.
Encoders & Decoders
Base64 Encode/Decode
EncodersEncode text to Base64 or decode Base64 back to plain text.
URL Encode/Decode
EncodersPercent-encode or decode URLs and query parameters.
HTML Entity Encode/Decode
EncodersConvert special characters to HTML entities and back.
Backslash Escape/Unescape
EncodersEscape or unescape backslash sequences in strings.
JWT Decoder
EncodersDecode and inspect JSON Web Token headers, payloads, and signatures.
Generators
UUID/ULID Generator
GeneratorsGenerate UUIDs (v4, v7) and ULIDs with bulk generation support.
Hash Generator
GeneratorsGenerate MD5, SHA-1, SHA-256, and SHA-512 hashes from text.
Random String Generator
GeneratorsGenerate random strings with customizable length and character sets.
Lorem Ipsum Generator
GeneratorsGenerate placeholder text in paragraphs, sentences, or words.
QR Code Generator
GeneratorsGenerate QR codes from text or URLs with downloadable output.
Converters
Unix Timestamp Converter
ConvertersConvert between Unix timestamps and human-readable dates.
Color Converter
ConvertersConvert between HEX, RGB, HSL, and other color formats.
Number Base Converter
ConvertersConvert numbers between binary, octal, decimal, and hexadecimal.
YAML/JSON Converter
ConvertersConvert between YAML and JSON formats bidirectionally.
JSON/CSV Converter
ConvertersConvert between JSON arrays and CSV tabular data.
HTML to JSX Converter
ConvertersConvert HTML markup to JSX-compatible React syntax.
cURL to Code Converter
ConvertersConvert cURL commands to Python, JavaScript, Go, and more.
Testers & Inspectors
Regex Tester
TestersTest regular expressions with real-time matching and group highlighting.
Cron Expression Builder
TestersBuild and validate cron expressions with a visual editor.
Text Diff Checker
TestersCompare two texts and highlight differences side by side.
URL Parser
TestersParse URLs into components: protocol, host, path, query, and fragment.
String Case Converter
TestersConvert text between camelCase, snake_case, kebab-case, and more.
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