Developer Tools

Choose a tool below. All run in your browser or on our server with no data stored. Filter by category for quick access.

Encoding Tools

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 to text. URL-safe mode and copy output.

URL Encoder / Decoder

Encode or decode URL components and query strings. Handles special characters.

HTML Entity Encoder / Decoder

Encode or decode HTML entities. Auto-detect and copy result.

Number Base Converter

Convert between binary, octal, decimal, and hexadecimal.

Security Tools

JWT Decoder

Decode JWT header and payload, view expiry and validity.

Bcrypt Generator & Verifier

Generate hashes and verify passwords (server-side).

UUID Generator & Validator

Generate UUID v4 and validate. Bulk 1–1000, export TXT/CSV.

Random String Generator

Generate random strings. Length, uppercase, lowercase, numbers, symbols.

Password Generator

Generate strong passwords. Length, symbols, strength meter.

Hash Generator

MD5, SHA-1, SHA-256, SHA-512 hashes from text.

Unix Permission Calculator

Visual chmod checkboxes to octal and symbolic permissions.

JWT Encoder

Create HS256 JWTs with header, payload, and secret (Web Crypto).

HMAC Generator

Generate HMAC-SHA256 or HMAC-SHA1 with a secret key.

Data Transformation Tools

JSON Formatter & Validator

Format, minify, and validate JSON with error messages and line numbers.

SQL Formatter

Beautify SQL with indentation and uppercase keywords.

CSV Header Validator

Detect duplicate or empty headers and column count issues.

Regex Tester

Test regex patterns, highlight matches, and show capture groups.

Timestamp Converter

Unix timestamp to date, date to timestamp, timezone, current time.

Color Converter

Convert HEX, RGB, HSL. Color preview and copy.

JSON Diff Tool

Compare two JSON objects. See added, removed, changed.

Text Diff Checker

Compare two text blocks. Highlight additions and deletions.

JSON ↔ PHP Array Converter

Convert JSON to PHP array syntax and PHP array to JSON.

Lorem Ipsum Generator

Generate paragraphs, sentences, or words.

Case Converter

UPPERCASE, lowercase, camelCase, PascalCase, snake_case, kebab-case.

Text Statistics

Word count, character count, sentence count, reading time.

SQL Query Generator

Build SELECT with table, columns, WHERE, LIMIT.

Git Command Cheat Sheet

Quick reference for Git commands: setup, commit, branch, remote, stash, undo, and more.

YAML Formatter & Validator

Format and validate YAML in your browser.

Scheduling Tools

Cron Expression Builder

Cron to human-readable text. Interactive builder and presets.

API / Network Tools

HTTP Header Inspector

Inspect status, headers, redirects, and CORS for any URL.

IP Address Lookup

Look up country, ISP, and location for an IP.

IP Subnet Calculator

Subnet mask, network, broadcast, host range from IP/CIDR.

HTTP Status Code Lookup

Look up HTTP status codes with meanings and when to use them.

User-Agent Parser

Parse browser user-agent strings into browser, OS, and device info.

MIME Type Lookup

Search common MIME types by file extension or type string.

Markup Tools

CSS Minifier / Formatter

Format or minify CSS. Remove comments. Copy result.

JavaScript Minifier / Formatter

Beautify or minify JavaScript. Copy result.

HTML Formatter & Minifier

Pretty format or minify HTML. Indentation control and optional comment removal.

Markdown Preview

Write Markdown, see rendered preview side by side.

XML Formatter & Minifier

Pretty-print or minify XML with indentation control.

robots.txt Generator

Build a robots.txt from allow/disallow rules and sitemap URL.

Meta Tag Generator

Generate HTML meta and Open Graph tags from title and description.