🏷️ Tag: Developer · 60 Tools · Free · No Signup
Developer Tools
All free online tools tagged with "developer" on Psyqo Tools. Every tool runs entirely in your browser — no data is sent to any server, no account needed.
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Developer Tools
60 toolsHash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text input.
JWT Decoder
Decode and inspect JSON Web Tokens to view header, payload, and signature.
Base64 Decode
Decode Base64 encoded strings back to plain text or binary data.
Base64 Encode
Encode any text or data to Base64 format. Supports full UTF-8 encoding.
UUID Generator
Generate RFC 4122 compliant UUIDs (v4) for unique identifiers.
API Key Generator
Generate random API keys and secret tokens with configurable formats.
Basic Auth Generator
Generate HTTP Basic Authentication headers from username and password.
JWT Parser
Parse JWT tokens with detailed claim analysis and expiration checking.
MD5 Generator
Compute MD5 hash from text input. Useful for checksums and legacy compatibility.
SHA1 Generator
Compute SHA-1 hash from text input using the Web Crypto API.
URL Decode
Decode URL-encoded (percent-encoded) strings back to readable text.
URL Encode
Encode text for safe use in URLs using percent-encoding.
Markdown Previewer
Write Markdown and see a live HTML preview side by side.
Text Diff Checker
Compare two texts and highlight the differences between them.
HTML to Text
Strip HTML tags and convert HTML to plain readable text.
Markdown to HTML
Convert Markdown text to clean HTML code ready to use.
API Request Tester
Browser-based Postman-like tool to compose and send HTTP requests and inspect responses in real time.
Code Diff Viewer
Compare two code snippets and view differences with syntax highlighting.
JSON Formatter
Format and beautify JSON data with proper indentation and syntax highlighting.
Regex Tester
Test regular expressions with live highlighting and match information.
.gitignore Generator
Generate .gitignore files for any project type: Node, Python, Java, React, and more.
CSS Minifier
Minify CSS code by removing whitespace, comments, and optimizing.
HTML Formatter
Beautify and format HTML code with proper indentation.
JS Minifier
Minify JavaScript code by removing whitespace and shortening variable names.
JSON Validator
Validate JSON syntax and get detailed error messages for invalid JSON.
JSON to CSV
Convert JSON arrays to CSV format for spreadsheet compatibility.
SQL Formatter
Format and beautify SQL queries with proper indentation and keywords.
Unix Time Converter
Convert between Unix timestamps and human-readable dates.
.env File Generator
Generate .env file templates for Node.js, Python, and other frameworks.
Base Converter
Convert numbers between any base from 2 to 36.
Binary to Decimal
Convert binary numbers to decimal format.
CSS Beautifier
Format and beautify compressed CSS code with proper indentation.
CSS Specificity Calculator
Calculate and compare the specificity of any CSS selectors.
Cron Expression Builder
Build and validate cron expressions with a visual interface.
Decimal to Binary
Convert decimal numbers to binary format.
Decimal to Hex
Convert decimal numbers to hexadecimal format.
Docker Compose Generator
Generate docker-compose.yml files for common service configurations.
HTML Minifier
Minify HTML by removing whitespace, comments, and unnecessary characters.
Hex to Binary
Convert hexadecimal numbers to binary format.
Hex to Decimal
Convert hexadecimal numbers to decimal format.
JS Beautifier
Format and beautify compressed JavaScript code.
JSON Minifier
Minify JSON by removing all whitespace and formatting.
JSON Prettifier
Pretty-print JSON with customizable indentation levels.
JSON to XML
Convert JSON data to well-formed XML format.
JSONPath Tester
Test and evaluate JSONPath expressions against JSON data.
Query String Parser
Parse and decode URL query strings into key-value pairs.
README Generator
Generate professional GitHub README.md files with sections, badges, and formatting.
Timestamp Converter
Convert timestamps between different formats and time zones.
URL Parser
Parse URLs into components: protocol, host, path, query parameters.
XML Formatter
Format and beautify XML documents with proper indentation.
XML Validator
Validate XML syntax and check for well-formedness.
Fake Data Generator
Generate realistic fake data for testing: names, emails, addresses.
HTTP Status Code Guide
Complete reference guide for all HTTP status codes with explanations.
Keyboard Event Tester
Test keyboard events and view key codes, keys, and modifiers.
MIME Type Lookup
Look up MIME types for file extensions and vice versa.
Mouse Event Tester
Test mouse events and view coordinates, buttons, and modifiers.
Code Quiz
Test your programming knowledge with trivia questions.
JWT Decoder (Local)
Decode JWT payload locally in your browser without sending data.
SQL Formatter
Format SQL queries locally in your browser.
Timestamp Converter
Convert Unix timestamps and dates locally in browser.
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