Developer Tools
26 JSON, YAML, XML, CSV, SQL, schema, and data format utilities plus encoding, hashing, minification, regex testing, and diff checking for developers.
Developers, data analysts, and QA engineers constantly work with structured data, encoding, hashing, and text transformation. Whether you are debugging an API response, decoding a JWT, testing a regex, or converting config files — these tasks need reliable, fast tools.
Our developer tools process everything in your browser. This means you can safely format API keys, configuration files, and sensitive data without worrying about it being sent to third-party servers. All tools are free, require no signup, and work offline once loaded.
Available Tools
JSON Formatter
Format, minify, and validate JSON with clear feedback.
JSON Validator
Check if your JSON is valid and find syntax errors.
JSON Schema Validator
Validate JSON data against a JSON Schema with instant feedback.
JSON to CSV
Convert JSON arrays to downloadable CSV files.
JSON to YAML
Convert JSON to YAML for config files.
YAML to JSON
Convert YAML configuration to JSON format.
Base64 Encode/Decode
Encode text to Base64 or decode Base64 to text.
HTML Encoder/Decoder
Encode or decode HTML entities for safe embedding.
URL Encoder/Decoder
Percent-encode or decode URL components.
Hash Generator
Generate SHA-256, SHA-512, and SHA-1 hashes from text.
Regex Tester
Test regex patterns with live matches and capture groups.
JWT Decoder
Decode JWT tokens to inspect header and payload.
Color Converter
Convert colors between HEX, RGB, and HSL.
CSS Minifier
Minify CSS by removing comments and whitespace.
Markdown Preview
Live Markdown to HTML preview with common syntax support.
Password Generator
Generate cryptographically secure random passwords.
UUID Generator
Generate random v4 UUIDs with bulk and format options.
Unix Timestamp Converter
Convert between Unix epoch and human-readable dates.
Text Diff Checker
Compare two texts and see additions, deletions, and changes.
Color Picker & Palette
Pick colors, check contrast ratios, generate palettes.
SQL Formatter
Format and beautify SQL queries with proper indentation.
XML Formatter & Validator
Format, beautify, and validate XML documents.
JSON to XML
Convert JSON data to well-formed XML.
XML to JSON
Convert XML documents to JSON format.
CSV to JSON
Convert CSV data to JSON with custom delimiters.
JS & HTML Minifier
Minify JavaScript and HTML to reduce file size.
Who uses these tools?
- Developers
- Analysts
- QA teams
- Designers
- Technical writers
Privacy first
All tools process your data directly in the browser. Your files and text are never uploaded to our servers. No account or signup required.
Read our privacy policy →Learn more
Check out our guides and comparisons for step-by-step tutorials, implementation choices, and workflow tradeoffs related to developer tools.
How to Format JSON Safely Online
Best practices for formatting, validating, and cleaning up JSON data without exposing sensitive information.
How to Decode JWT Tokens
Understand JWT structure, signing algorithms, security best practices, and how to decode tokens safely with our free tool.
Regex Basics for Beginners
Learn regular expressions from scratch — syntax, quantifiers, groups, 10 practical patterns, and common mistakes to avoid.
JSON Formatter vs JSON Validator
When to validate first, when to format next, and which JSON tool to use for debugging, cleanup, or production workflows.
JSON Validator vs JSON Schema Validator
Understand the difference between JSON validation and JSON schema validation so you debug payload syntax and contracts in the right order.