Free Developer Tools Online
62 free tools — no signup required
Essential utilities for web developers and programmers. Format and minify JSON, CSS, JavaScript, and SQL. Convert between data formats like CSV, XML, YAML, and JSON. Generate meta tags, regex patterns, and code boilerplate. Validate and debug JWTs, cron expressions, and user agents.
Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 strings back to plain text.
URL Encoder/Decoder
Encode or decode URL components for safe use in web addresses.
HTML Entity Encoder/Decoder
Encode special characters to HTML entities or decode them back.
CSV to JSON
Convert CSV data to JSON format and vice versa.
XML to JSON
Convert XML data to JSON format.
YAML to JSON
Convert between YAML and JSON formats.
JSON to CSV
Convert JSON arrays to CSV format for spreadsheets and data analysis.
JSON to XML
Convert JSON data to XML format with customizable options.
JSON to YAML
Convert JSON data to YAML format for configuration files.
TypeScript to JSON Schema
Convert TypeScript interfaces to JSON Schema definitions.
Programmer's Calculator
Convert between binary, octal, decimal, and hexadecimal with bitwise operations.
TOML to JSON Converter
Convert TOML configuration files to JSON format.
cURL to Code Converter
Convert cURL commands to JavaScript Fetch or Python Requests code.
Escape / Unescape Tool
Escape and unescape strings for URL, HTML, JSON, Base64, and RegEx.
Binary to Text Converter
Convert binary code to readable text and text to binary.