Free online developer tools
in one calm place.
29+ browser-based utilities for JSON, code formatting, encoding, validation, and generation — with helpful guides on every page.
No signup • Works in your browser • Simple & Powerful
JSON Formatter
Format and beautify JSON instantly
Try It NowJSON ToolsJSON Validator
Check JSON syntax with precise error locations
Try It NowGeneratorsUUID Generator
Generate random version 4 UUIDs in bulk
Try It NowGeneratorsQR Code Generator
Turn any text or URL into a QR code
Try It NowGeneratorsQR Code Generator with Logo
Create branded QR codes with your logo
Try It NowText & RegexRegex Tester
Test regular expressions with live highlighting
Try It NowEncoders & DecodersBase64 Encoder & Decoder
Encode and decode Base64 strings instantly
Try It NowEncoders & DecodersURL Encoder & Decoder
Encode and decode URL components safely
Try It NowConvertersUnix Timestamp Converter
Convert Unix timestamps to human-readable dates
Try It NowGeneratorsCron Expression Generator
Build cron schedules with a visual editor
Try It NowFormattersSQL Formatter
Beautify SQL queries with consistent indentation
Try It NowFormattersSQL Minifier
Compress SQL by removing whitespace and comments
Try It NowFormattersHTML Formatter
Format and indent HTML markup cleanly
Try It NowFormattersCSS Formatter
Beautify stylesheets with readable structure
Try It NowFormattersJavaScript Formatter
Format and beautify JavaScript code
Try It NowJSON ToolsJSON Minifier
Compress JSON by removing all whitespace
Try It NowFormattersXML Formatter
Beautify XML with proper indentation
Try It NowValidatorsXML Validator
Validate XML syntax with detailed error messages
Try It NowValidatorsYAML Validator
Validate YAML syntax with line-level errors
Try It NowJSON ToolsYAML to JSON Converter
Convert YAML documents to JSON format
Try It NowJSON ToolsJSON to YAML Converter
Convert JSON data to clean YAML output
Try It NowJSON ToolsJSON to CSV Converter
Flatten JSON arrays into CSV spreadsheets
Try It NowJSON ToolsCSV to JSON Converter
Parse CSV files into structured JSON
Try It NowText & RegexMarkdown Previewer
Write Markdown and preview rendered HTML live
Try It NowGeneratorsHash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes
Try It NowGeneratorsPassword Generator
Create strong, random passwords instantly
Try It NowGeneratorsRandom String Generator
Generate random alphanumeric strings in bulk
Try It NowGeneratorsColor Picker
Pick colors and convert between HEX, RGB, and HSL
Try It NowGeneratorsMeta Tags Toolkit
Preview, edit, and generate SEO meta tags
Try It NowBuilt for calm, focused work
Every tool runs entirely in your browser. No sign-ups, no uploads, no ads on the tools themselves. Paste your data, get your result, and move on.
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