Developer Toolbox

Fast, privacy-focused tools that run entirely in your browser. No data is ever sent to a server.

100% Client-Side - No Data Collection

/ focus • ↑↓ navigate • Enter open • Esc clear

JSON to YAML Converter

Convert JSON data to YAML format instantly. Free online JSON to YAML converter with syntax highlighting.

JSON to CSV Converter

Convert JSON arrays to CSV format. Free online JSON to CSV converter with download support.

JSON Schema Validator

Validate JSON data against JSON Schema rules instantly. See precise validation errors and paths directly in your browser.

JSONPath Playground

Query JSON documents with JSONPath expressions. Inspect matched values and paths instantly in your browser.

XPath Tester

Evaluate XPath expressions against XML documents. Inspect matching nodes and extracted values instantly in your browser.

Base64 Encoder / Decoder

Encode and decode Base64 strings online. Fast, free Base64 conversion tool running entirely in your browser.

URL Encoder / Decoder

Encode and decode URL components online. Free URL encoding tool for query parameters and URIs.

JWT Decoder

Decode JSON Web Tokens (JWT) instantly. View header, payload, and claims without sending data to any server.

Unicode Escape / Unescape

Convert plain text to Unicode escape sequences and decode escaped text back instantly in your browser.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds.

UUID Generator

Generate random UUIDs (v4) instantly. Bulk UUID generation with copy and download support.

Hash Generator

Generate MD5, SHA-256, and SHA-512 hashes. All hashing done locally using Web Crypto API.

SSL Certificate Inspector

Inspect PEM certificates to view issuer, subject, validity, SAN entries, and cryptographic fingerprints.

Regex Tester

Test regular expressions with live matching and highlighting. Supports JavaScript regex syntax.

Regex Replace Playground

Test regex-based search-and-replace rules with capture groups, flags, and detailed match output.

Text Formatter & Cleaner

Powerful text utility to remove specific characters, trim whitespace, remove blank lines, and normalize spacing locally.

Lorem Ipsum Generator

Generate lorem ipsum text by words, sentences, or paragraphs. Includes classic and developer-focused placeholder modes.

Markdown Editor & Preview

Write Markdown with live preview and export clean HTML instantly. Supports GitHub Flavored Markdown in your browser.

SQL Formatter

Format and beautify SQL queries online. Supports multiple SQL dialects with instant formatting.

Color Converter (HEX, RGB, HSL, Tailwind)

Convert HEX, RGB, and HSL color values instantly. Find the closest Tailwind CSS color class and copy formats with one click.

cURL to Fetch Converter

Convert cURL commands to JavaScript fetch() calls. Transform API requests instantly.

HTTP Request Builder

Convert raw HTTP requests into cURL, fetch, and axios snippets. Optionally send requests directly from your browser.

Password Generator

Generate secure, random passwords. Customize length and character types locally in your browser.

Cron Expression Parser

Parse cron expressions into human readable text. Instantly validate and translate cron schedules.

HTML Encoder / Decoder

Encode and decode HTML entities. Convert special characters to their corresponding HTML entities.

Text Diff Checker

Compare two text files to find differences. Fast, local text comparison and diff viewer.

Code Beautifier

Format and beautify HTML, CSS, JavaScript, and TypeScript code in your browser.

Fake JSON Generator

Generate massive schemas of fake JSON datatypes instantly using Faker.js logic.

YAML to JSON Converter

Convert YAML format into JSON structures. Browser-based, fast, and secure.

CSV to JSON Converter

Convert raw CSV data arrays into JSON objects.

Timezone Converter

Convert dates and times across global timezones. Fast local execution with instant visualization.

HTTP Header Parser

Parse raw HTTP headers into formatted JSON key-value pairs instantly.

OpenAPI Validator & Endpoint Extractor

Validate OpenAPI JSON/YAML documents and extract endpoints, methods, and operation details quickly.

URL Query Parameter Parser

Extract and parse URL query strings (?a=1&b=2) into structured JSON formats.

Password Strength & Entropy

Analyze password strength, entropy bits, and crack time estimations locally using zxcvbn.

Webhook Signature Checker

Compute and verify webhook HMAC signatures (SHA-1/SHA-256/SHA-512) using payload, secret, and received signature headers.

.env File Parser

Parse multiple lines of .env configuration files into JSON objects for quick integration.

.env Diff & Conflict Resolver

Compare two .env files, detect added/removed/changed keys, and generate merged output with precedence rules.

Chmod Calculator

Convert Unix file permissions between numeric and symbolic formats. Calculate chmod values like 755 and rwxr-xr-x instantly.

Code Minifier

Minify HTML, CSS, and JS by stripping whitespaces and comments to reduce file size.

Tool Pipeline Builder

Chain multiple transformations in one flow: JSON, YAML, Base64, URL, HTML, and Unicode operations in a single run.

TOML to JSON Converter

Convert TOML configuration arrays and tables into valid JSON instantly.

INI to JSON Converter

Parse legacy INI configuration files into nested JSON objects.