Free Online Developer Tools
JSON formatter, code minifier, regex tester, hash generator, color picker, JWT decoder and more. Essential tools for web developers and programmers.
JSON Formatter
Format, validate and minify JSON code
Try now βRegex Tester
Test and debug regular expressions in real time
Try now βQR Code Generator
Generate custom QR codes from text or URLs
Try now βURL Encoder/Decoder
Encode or decode URLs and URI components
Try now βUnix Timestamp Converter
Convert between Unix timestamps and human-readable dates
Try now βCSS/HTML/JS Minifier
Minify CSS, HTML and JavaScript code to reduce file size
Try now βSQL Formatter
Format and beautify SQL queries or minify them
Try now βXML β JSON Converter
Convert between XML and JSON formats instantly. Bidirectional conversion with attribute support.
Try now βYAML β JSON Converter
Convert between YAML and JSON formats. Bidirectional conversion with support for common YAML features.
Try now βHTML Entity Encoder/Decoder
Encode special characters to HTML entities or decode HTML entities back to characters.
Try now βJSON Path Evaluator
Query JSON data using JSONPath expressions. Extract specific values from complex JSON structures.
Try now βCSV Editor
Edit CSV data in a spreadsheet-like table. Add/remove rows and columns, change delimiters.
Try now βMarkdown Table Generator
Generate Markdown tables visually. Set columns, rows, alignment, and copy the formatted output.
Try now βSQL to CSV Converter
Convert SQL INSERT statements to CSV format. Extract data from SQL dumps easily.
Try now βYAML Validator
Validate YAML syntax and check for common errors like indentation issues, unclosed quotes, and invalid keys.
Try now βJavaScript Minifier
Minify JavaScript code by removing comments, whitespace, and unnecessary characters.
Try now βHTML Minifier
Minify HTML code by removing comments, extra whitespace, and unnecessary characters.
Try now βJSON Diff
Compare two JSON objects and see the differences. Shows added, removed, and changed values with paths.
Try now βCron Expression Parser
Parse and explain cron expressions. See human-readable descriptions and next scheduled run times.
Try now βChmod Calculator
Calculate Unix file permissions. Toggle read, write, execute for owner, group, and others.
Try now βHTTP Status Codes
Browse and search all HTTP status codes with their meanings. Filter by category (1xx-5xx).
Try now βJSON to TypeScript
Generate TypeScript interfaces from JSON data. Automatically infer types for all properties.
Try now βText to Binary Converter
Convert text to binary, hexadecimal, octal, or decimal representation and back.
Try now βURL Parser
Parse and dissect URLs into their components: protocol, host, path, query parameters, and more.
Try now βRegex Generator
Build and test regular expressions with live highlighting
Try now βJSON Schema Generator
Generate JSON Schema from a JSON sample automatically
Try now βAPI Tester
Test REST API endpoints with custom headers and body
Try now βWhy Use Tuttilo Developer Tools?
- All tools work offline β perfect for handling sensitive code and API keys
- Covers the most common developer tasks: formatting, encoding, hashing, testing
- Clean, distraction-free interface designed for developer workflows
Frequently Asked Questions
What developer tools are available?+
JSON formatter/validator, code minifier, regex tester, hash generator (MD5, SHA-1, SHA-256), color picker, JWT decoder, Base64 tools, URL encoder, and more.
Can I use these tools with sensitive data?+
Yes, all processing happens locally in your browser. No data is ever sent to a server, making these tools safe for API keys, tokens, and sensitive code.
Do these tools work offline?+
After the initial page load, most developer tools work fully offline since all processing is client-side. You can even save the page for offline use.