Puenbann Developer

Core tools for formatting, validating, generating, and debugging code and data structures

JSON Formatter

Format, validate, and make your JSON readable with a tree view.

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Diff Checker

Compare two texts or files side by side and highlight the differences.

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Code Beautifier/Minifier

Format and minify code (JS, CSS, HTML) for readability or optimization.

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SQL Formatter

Format, beautify, and minify SQL queries with dialect-aware rules.

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Regex Tester

Tool for testing Regular Expressions with highlighting and explanations.

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CRON Job Editor

Create and validate CRON expressions with human-readable descriptions.

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JWT Encoder / Decoder

Decode and generate JSON Web Tokens. Inspect payloads or create new tokens.

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UUID Generator

Generate UUID v4, v7, and v1 in bulk — formatted the way your codebase expects.

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ULID & Nano ID Generator

Generate sortable ULIDs or compact, custom-alphabet Nano IDs in bulk.

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URL Parser

Split URLs into protocol, hostname, path, and query parameters.

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Soon

Hashing Tool

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes for your text.

API Tester

Test REST APIs with request/response management.

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Advanced Regex Tester

Test, explain, and generate regular expressions with AI-powered assistance.

JSON to TS / Go Struct Converter

Convert raw JSON into fully-typed TypeScript interfaces or Go structs in your browser.

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YAML ↔ JSON ↔ XML ↔ CSV Converter

Convert data structures between YAML, JSON, XML, and CSV formats instantly in your browser with syntax validation.

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Encoder / Decoder

Encode and decode Base64, URL, HTML entities, ROT13, and JS string escapes — plus file to Base64.

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Semver Calculator

Parse, compare, and bump semantic version numbers (major.minor.patch), entirely in your browser.

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Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal instantly, entirely in your browser.

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User-Agent Parser

Parse any User-Agent string into browser, operating system, and device type, entirely in your browser.

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.env Viewer & Validator

Parse a .env file, mask secret values by default, and flag duplicate or malformed keys, entirely in your browser.

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CSS Gradient Generator

Design a linear or radial CSS gradient visually and copy the generated code, entirely in your browser.

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Cubic Bezier Generator

Design a custom cubic-bezier() timing function visually, preview the motion, and copy the CSS, entirely in your browser.

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CSS Box-Shadow Generator

Design a CSS box-shadow visually with offset, blur, spread, color, and opacity controls, and copy the generated code, entirely in your browser.

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Base64 ⇄ Image/File Converter

Convert any file or image to a Base64 data URI, or decode Base64 back into a downloadable file, entirely in your browser.

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GZIP Compressor

Compress text to GZIP (base64-encoded) or decompress it back, entirely in your browser using the native Compression Streams API.

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JSONPath Tester

Test JSONPath expressions against your JSON data and see matching results instantly.

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JSON Schema Validator

Validate JSON data against a JSON Schema and see every error instantly.

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Code to Image Converter

Turn a code snippet into a beautiful, syntax-highlighted image you can share.

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Fake / Mock Data Generator

Generate realistic fake test data as JSON, CSV, or SQL, entirely in your browser.

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